]> nv-tegra.nvidia Code Review - linux-2.6.git/commitdiff
Merge branch 'linus' into perfcounters/core
authorIngo Molnar <mingo@elte.hu>
Sat, 19 Sep 2009 09:27:32 +0000 (11:27 +0200)
committerIngo Molnar <mingo@elte.hu>
Sat, 19 Sep 2009 09:28:41 +0000 (11:28 +0200)
Merge reason: Bring in tracing changes we depend on.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
22 files changed:
arch/x86/kernel/cpu/perf_counter.c
include/linux/perf_counter.h
include/trace/events/sched.h
kernel/perf_counter.c
kernel/sched_clock.c
kernel/sched_fair.c
tools/perf/Documentation/perf-sched.txt [new file with mode: 0644]
tools/perf/Documentation/perf-trace.txt [new file with mode: 0644]
tools/perf/Makefile
tools/perf/builtin-record.c
tools/perf/builtin-sched.c [new file with mode: 0644]
tools/perf/builtin.h
tools/perf/command-list.txt
tools/perf/perf.c
tools/perf/util/event.h
tools/perf/util/parse-events.c
tools/perf/util/thread.c
tools/perf/util/thread.h
tools/perf/util/trace-event-info.c
tools/perf/util/trace-event-parse.c
tools/perf/util/trace-event-read.c
tools/perf/util/trace-event.h

index 2732e2c1e4d340257e10a072fd7f4e2dbaa0a0a3..dbdf712fae9ec52f5a75c4a2b50fb6d272ca6f43 100644 (file)
@@ -36,10 +36,10 @@ static u64 perf_counter_mask __read_mostly;
 #define BTS_RECORD_SIZE                24
 
 /* The size of a per-cpu BTS buffer in bytes: */
-#define BTS_BUFFER_SIZE                (BTS_RECORD_SIZE * 1024)
+#define BTS_BUFFER_SIZE                (BTS_RECORD_SIZE * 2048)
 
 /* The BTS overflow threshold in bytes from the end of the buffer: */
-#define BTS_OVFL_TH            (BTS_RECORD_SIZE * 64)
+#define BTS_OVFL_TH            (BTS_RECORD_SIZE * 128)
 
 
 /*
@@ -1488,8 +1488,7 @@ void perf_counter_print_debug(void)
        local_irq_restore(flags);
 }
 
-static void intel_pmu_drain_bts_buffer(struct cpu_hw_counters *cpuc,
-                                      struct perf_sample_data *data)
+static void intel_pmu_drain_bts_buffer(struct cpu_hw_counters *cpuc)
 {
        struct debug_store *ds = cpuc->ds;
        struct bts_record {
@@ -1498,8 +1497,11 @@ static void intel_pmu_drain_bts_buffer(struct cpu_hw_counters *cpuc,
                u64     flags;
        };
        struct perf_counter *counter = cpuc->counters[X86_PMC_IDX_FIXED_BTS];
-       unsigned long orig_ip = data->regs->ip;
        struct bts_record *at, *top;
+       struct perf_output_handle handle;
+       struct perf_event_header header;
+       struct perf_sample_data data;
+       struct pt_regs regs;
 
        if (!counter)
                return;
@@ -1510,19 +1512,38 @@ static void intel_pmu_drain_bts_buffer(struct cpu_hw_counters *cpuc,
        at  = (struct bts_record *)(unsigned long)ds->bts_buffer_base;
        top = (struct bts_record *)(unsigned long)ds->bts_index;
 
+       if (top <= at)
+               return;
+
        ds->bts_index = ds->bts_buffer_base;
 
+
+       data.period     = counter->hw.last_period;
+       data.addr       = 0;
+       regs.ip         = 0;
+
+       /*
+        * Prepare a generic sample, i.e. fill in the invariant fields.
+        * We will overwrite the from and to address before we output
+        * the sample.
+        */
+       perf_prepare_sample(&header, &data, counter, &regs);
+
+       if (perf_output_begin(&handle, counter,
+                             header.size * (top - at), 1, 1))
+               return;
+
        for (; at < top; at++) {
-               data->regs->ip  = at->from;
-               data->addr      = at->to;
+               data.ip         = at->from;
+               data.addr       = at->to;
 
-               perf_counter_output(counter, 1, data);
+               perf_output_sample(&handle, &header, &data, counter);
        }
 
-       data->regs->ip  = orig_ip;
-       data->addr      = 0;
+       perf_output_end(&handle);
 
        /* There's new data available. */
+       counter->hw.interrupts++;
        counter->pending_kill = POLL_IN;
 }
 
@@ -1552,13 +1573,9 @@ static void x86_pmu_disable(struct perf_counter *counter)
        x86_perf_counter_update(counter, hwc, idx);
 
        /* Drain the remaining BTS records. */
-       if (unlikely(idx == X86_PMC_IDX_FIXED_BTS)) {
-               struct perf_sample_data data;
-               struct pt_regs regs;
+       if (unlikely(idx == X86_PMC_IDX_FIXED_BTS))
+               intel_pmu_drain_bts_buffer(cpuc);
 
-               data.regs = &regs;
-               intel_pmu_drain_bts_buffer(cpuc, &data);
-       }
        cpuc->counters[idx] = NULL;
        clear_bit(idx, cpuc->used_mask);
 
@@ -1619,7 +1636,6 @@ static int p6_pmu_handle_irq(struct pt_regs *regs)
        int idx, handled = 0;
        u64 val;
 
-       data.regs = regs;
        data.addr = 0;
 
        cpuc = &__get_cpu_var(cpu_hw_counters);
@@ -1644,7 +1660,7 @@ static int p6_pmu_handle_irq(struct pt_regs *regs)
                if (!x86_perf_counter_set_period(counter, hwc, idx))
                        continue;
 
-               if (perf_counter_overflow(counter, 1, &data))
+               if (perf_counter_overflow(counter, 1, &data, regs))
                        p6_pmu_disable_counter(hwc, idx);
        }
 
@@ -1665,13 +1681,12 @@ static int intel_pmu_handle_irq(struct pt_regs *regs)
        int bit, loops;
        u64 ack, status;
 
-       data.regs = regs;
        data.addr = 0;
 
        cpuc = &__get_cpu_var(cpu_hw_counters);
 
        perf_disable();
-       intel_pmu_drain_bts_buffer(cpuc, &data);
+       intel_pmu_drain_bts_buffer(cpuc);
        status = intel_pmu_get_status();
        if (!status) {
                perf_enable();
@@ -1702,7 +1717,7 @@ again:
 
                data.period = counter->hw.last_period;
 
-               if (perf_counter_overflow(counter, 1, &data))
+               if (perf_counter_overflow(counter, 1, &data, regs))
                        intel_pmu_disable_counter(&counter->hw, bit);
        }
 
@@ -1729,7 +1744,6 @@ static int amd_pmu_handle_irq(struct pt_regs *regs)
        int idx, handled = 0;
        u64 val;
 
-       data.regs = regs;
        data.addr = 0;
 
        cpuc = &__get_cpu_var(cpu_hw_counters);
@@ -1754,7 +1768,7 @@ static int amd_pmu_handle_irq(struct pt_regs *regs)
                if (!x86_perf_counter_set_period(counter, hwc, idx))
                        continue;
 
-               if (perf_counter_overflow(counter, 1, &data))
+               if (perf_counter_overflow(counter, 1, &data, regs))
                        amd_pmu_disable_counter(hwc, idx);
        }
 
index 972f90d7a32f7660fa1ef2362c4904c4b3651d28..c7375f97aa197d3347c5e41460c1f2661723d682 100644 (file)
@@ -199,10 +199,14 @@ struct perf_counter_attr {
                                inherit_stat   :  1, /* per task counts       */
                                enable_on_exec :  1, /* next exec enables     */
                                task           :  1, /* trace fork/exit       */
+                               watermark      :  1, /* wakeup_watermark      */
 
-                               __reserved_1   : 50;
+                               __reserved_1   : 49;
 
-       __u32                   wakeup_events;  /* wakeup every n events */
+       union {
+               __u32           wakeup_events;    /* wakeup every n events */
+               __u32           wakeup_watermark; /* bytes before wakeup   */
+       };
        __u32                   __reserved_2;
 
        __u64                   __reserved_3;
@@ -521,6 +525,8 @@ struct perf_mmap_data {
        atomic_t                        wakeup;         /* needs a wakeup    */
        atomic_t                        lost;           /* nr records lost   */
 
+       long                            watermark;      /* wakeup watermark  */
+
        struct perf_counter_mmap_page   *user_page;
        void                            *data_pages[0];
 };
@@ -685,6 +691,17 @@ struct perf_cpu_context {
        int                             recursion[4];
 };
 
+struct perf_output_handle {
+       struct perf_counter     *counter;
+       struct perf_mmap_data   *data;
+       unsigned long           head;
+       unsigned long           offset;
+       int                     nmi;
+       int                     sample;
+       int                     locked;
+       unsigned long           flags;
+};
+
 #ifdef CONFIG_PERF_COUNTERS
 
 /*
@@ -716,16 +733,38 @@ extern int hw_perf_group_sched_in(struct perf_counter *group_leader,
 extern void perf_counter_update_userpage(struct perf_counter *counter);
 
 struct perf_sample_data {
-       struct pt_regs                  *regs;
+       u64                             type;
+
+       u64                             ip;
+       struct {
+               u32     pid;
+               u32     tid;
+       }                               tid_entry;
+       u64                             time;
        u64                             addr;
+       u64                             id;
+       u64                             stream_id;
+       struct {
+               u32     cpu;
+               u32     reserved;
+       }                               cpu_entry;
        u64                             period;
+       struct perf_callchain_entry     *callchain;
        struct perf_raw_record          *raw;
 };
 
+extern void perf_output_sample(struct perf_output_handle *handle,
+                              struct perf_event_header *header,
+                              struct perf_sample_data *data,
+                              struct perf_counter *counter);
+extern void perf_prepare_sample(struct perf_event_header *header,
+                               struct perf_sample_data *data,
+                               struct perf_counter *counter,
+                               struct pt_regs *regs);
+
 extern int perf_counter_overflow(struct perf_counter *counter, int nmi,
-                                struct perf_sample_data *data);
-extern void perf_counter_output(struct perf_counter *counter, int nmi,
-                               struct perf_sample_data *data);
+                                struct perf_sample_data *data,
+                                struct pt_regs *regs);
 
 /*
  * Return 1 for a software counter, 0 for a hardware counter
@@ -775,6 +814,12 @@ extern void perf_tpcounter_event(int event_id, u64 addr, u64 count,
 #define perf_instruction_pointer(regs) instruction_pointer(regs)
 #endif
 
+extern int perf_output_begin(struct perf_output_handle *handle,
+                            struct perf_counter *counter, unsigned int size,
+                            int nmi, int sample);
+extern void perf_output_end(struct perf_output_handle *handle);
+extern void perf_output_copy(struct perf_output_handle *handle,
+                            const void *buf, unsigned int len);
 #else
 static inline void
 perf_counter_task_sched_in(struct task_struct *task, int cpu)          { }
@@ -801,7 +846,28 @@ static inline void perf_counter_mmap(struct vm_area_struct *vma)   { }
 static inline void perf_counter_comm(struct task_struct *tsk)          { }
 static inline void perf_counter_fork(struct task_struct *tsk)          { }
 static inline void perf_counter_init(void)                             { }
+
+static inline int
+perf_output_begin(struct perf_output_handle *handle, struct perf_counter *c,
+                 unsigned int size, int nmi, int sample)               { }
+static inline void perf_output_end(struct perf_output_handle *handle)  { }
+static inline void
+perf_output_copy(struct perf_output_handle *handle,
+                const void *buf, unsigned int len)                     { }
+static inline void
+perf_output_sample(struct perf_output_handle *handle,
+                  struct perf_event_header *header,
+                  struct perf_sample_data *data,
+                  struct perf_counter *counter)                        { }
+static inline void
+perf_prepare_sample(struct perf_event_header *header,
+                   struct perf_sample_data *data,
+                   struct perf_counter *counter,
+                   struct pt_regs *regs)                               { }
 #endif
 
+#define perf_output_put(handle, x) \
+       perf_output_copy((handle), &(x), sizeof(x))
+
 #endif /* __KERNEL__ */
 #endif /* _LINUX_PERF_COUNTER_H */
index b48f1ad7c946ceca285aaca7f57619f0c13a6319..4069c43f4187e522a65435a65f3888fff39a707e 100644 (file)
@@ -379,6 +379,39 @@ TRACE_EVENT(sched_stat_wait,
                        (unsigned long long)__entry->delay)
 );
 
+/*
+ * Tracepoint for accounting runtime (time the task is executing
+ * on a CPU).
+ */
+TRACE_EVENT(sched_stat_runtime,
+
+       TP_PROTO(struct task_struct *tsk, u64 runtime, u64 vruntime),
+
+       TP_ARGS(tsk, runtime, vruntime),
+
+       TP_STRUCT__entry(
+               __array( char,  comm,   TASK_COMM_LEN   )
+               __field( pid_t, pid                     )
+               __field( u64,   runtime                 )
+               __field( u64,   vruntime                        )
+       ),
+
+       TP_fast_assign(
+               memcpy(__entry->comm, tsk->comm, TASK_COMM_LEN);
+               __entry->pid            = tsk->pid;
+               __entry->runtime        = runtime;
+               __entry->vruntime       = vruntime;
+       )
+       TP_perf_assign(
+               __perf_count(runtime);
+       ),
+
+       TP_printk("task: %s:%d runtime: %Lu [ns], vruntime: %Lu [ns]",
+                       __entry->comm, __entry->pid,
+                       (unsigned long long)__entry->runtime,
+                       (unsigned long long)__entry->vruntime)
+);
+
 /*
  * Tracepoint for accounting sleep time (time the task is not runnable,
  * including iowait, see below).
index 8cb94a52d1bb3c21154e8dd028eecc93e1588866..d013f4e89e9cdee913b117cbbc83e4e326889113 100644 (file)
@@ -2176,6 +2176,13 @@ static int perf_mmap_data_alloc(struct perf_counter *counter, int nr_pages)
        data->nr_pages = nr_pages;
        atomic_set(&data->lock, -1);
 
+       if (counter->attr.watermark) {
+               data->watermark = min_t(long, PAGE_SIZE * nr_pages,
+                                     counter->attr.wakeup_watermark);
+       }
+       if (!data->watermark)
+               data->watermark = max(PAGE_SIZE, PAGE_SIZE * nr_pages / 4);
+
        rcu_assign_pointer(counter->data, data);
 
        return 0;
@@ -2315,7 +2322,8 @@ static int perf_mmap(struct file *file, struct vm_area_struct *vma)
        lock_limit >>= PAGE_SHIFT;
        locked = vma->vm_mm->locked_vm + extra;
 
-       if ((locked > lock_limit) && !capable(CAP_IPC_LOCK)) {
+       if ((locked > lock_limit) && perf_paranoid_tracepoint_raw() &&
+               !capable(CAP_IPC_LOCK)) {
                ret = -EPERM;
                goto unlock;
        }
@@ -2504,35 +2512,15 @@ __weak struct perf_callchain_entry *perf_callchain(struct pt_regs *regs)
 /*
  * Output
  */
-
-struct perf_output_handle {
-       struct perf_counter     *counter;
-       struct perf_mmap_data   *data;
-       unsigned long           head;
-       unsigned long           offset;
-       int                     nmi;
-       int                     sample;
-       int                     locked;
-       unsigned long           flags;
-};
-
-static bool perf_output_space(struct perf_mmap_data *data,
-                             unsigned int offset, unsigned int head)
+static bool perf_output_space(struct perf_mmap_data *data, unsigned long tail,
+                             unsigned long offset, unsigned long head)
 {
-       unsigned long tail;
        unsigned long mask;
 
        if (!data->writable)
                return true;
 
        mask = (data->nr_pages << PAGE_SHIFT) - 1;
-       /*
-        * Userspace could choose to issue a mb() before updating the tail
-        * pointer. So that all reads will be completed before the write is
-        * issued.
-        */
-       tail = ACCESS_ONCE(data->user_page->data_tail);
-       smp_rmb();
 
        offset = (offset - tail) & mask;
        head   = (head   - tail) & mask;
@@ -2633,8 +2621,8 @@ out:
        local_irq_restore(handle->flags);
 }
 
-static void perf_output_copy(struct perf_output_handle *handle,
-                            const void *buf, unsigned int len)
+void perf_output_copy(struct perf_output_handle *handle,
+                     const void *buf, unsigned int len)
 {
        unsigned int pages_mask;
        unsigned int offset;
@@ -2669,16 +2657,13 @@ static void perf_output_copy(struct perf_output_handle *handle,
        WARN_ON_ONCE(((long)(handle->head - handle->offset)) < 0);
 }
 
-#define perf_output_put(handle, x) \
-       perf_output_copy((handle), &(x), sizeof(x))
-
-static int perf_output_begin(struct perf_output_handle *handle,
-                            struct perf_counter *counter, unsigned int size,
-                            int nmi, int sample)
+int perf_output_begin(struct perf_output_handle *handle,
+                     struct perf_counter *counter, unsigned int size,
+                     int nmi, int sample)
 {
        struct perf_counter *output_counter;
        struct perf_mmap_data *data;
-       unsigned int offset, head;
+       unsigned long tail, offset, head;
        int have_lost;
        struct {
                struct perf_event_header header;
@@ -2716,16 +2701,23 @@ static int perf_output_begin(struct perf_output_handle *handle,
        perf_output_lock(handle);
 
        do {
+               /*
+                * Userspace could choose to issue a mb() before updating the
+                * tail pointer. So that all reads will be completed before the
+                * write is issued.
+                */
+               tail = ACCESS_ONCE(data->user_page->data_tail);
+               smp_rmb();
                offset = head = atomic_long_read(&data->head);
                head += size;
-               if (unlikely(!perf_output_space(data, offset, head)))
+               if (unlikely(!perf_output_space(data, tail, offset, head)))
                        goto fail;
        } while (atomic_long_cmpxchg(&data->head, offset, head) != offset);
 
        handle->offset  = offset;
        handle->head    = head;
 
-       if ((offset >> PAGE_SHIFT) != (head >> PAGE_SHIFT))
+       if (head - tail > data->watermark)
                atomic_set(&data->wakeup, 1);
 
        if (have_lost) {
@@ -2749,7 +2741,7 @@ out:
        return -ENOSPC;
 }
 
-static void perf_output_end(struct perf_output_handle *handle)
+void perf_output_end(struct perf_output_handle *handle)
 {
        struct perf_counter *counter = handle->counter;
        struct perf_mmap_data *data = handle->data;
@@ -2863,156 +2855,176 @@ static void perf_output_read(struct perf_output_handle *handle,
                perf_output_read_one(handle, counter);
 }
 
-void perf_counter_output(struct perf_counter *counter, int nmi,
-                               struct perf_sample_data *data)
+void perf_output_sample(struct perf_output_handle *handle,
+                       struct perf_event_header *header,
+                       struct perf_sample_data *data,
+                       struct perf_counter *counter)
 {
-       int ret;
-       u64 sample_type = counter->attr.sample_type;
-       struct perf_output_handle handle;
-       struct perf_event_header header;
-       u64 ip;
-       struct {
-               u32 pid, tid;
-       } tid_entry;
-       struct perf_callchain_entry *callchain = NULL;
-       int callchain_size = 0;
-       u64 time;
-       struct {
-               u32 cpu, reserved;
-       } cpu_entry;
-
-       header.type = PERF_EVENT_SAMPLE;
-       header.size = sizeof(header);
-
-       header.misc = 0;
-       header.misc |= perf_misc_flags(data->regs);
-
-       if (sample_type & PERF_SAMPLE_IP) {
-               ip = perf_instruction_pointer(data->regs);
-               header.size += sizeof(ip);
-       }
+       u64 sample_type = data->type;
 
-       if (sample_type & PERF_SAMPLE_TID) {
-               /* namespace issues */
-               tid_entry.pid = perf_counter_pid(counter, current);
-               tid_entry.tid = perf_counter_tid(counter, current);
+       perf_output_put(handle, *header);
 
-               header.size += sizeof(tid_entry);
-       }
+       if (sample_type & PERF_SAMPLE_IP)
+               perf_output_put(handle, data->ip);
 
-       if (sample_type & PERF_SAMPLE_TIME) {
-               /*
-                * Maybe do better on x86 and provide cpu_clock_nmi()
-                */
-               time = sched_clock();
+       if (sample_type & PERF_SAMPLE_TID)
+               perf_output_put(handle, data->tid_entry);
 
-               header.size += sizeof(u64);
-       }
+       if (sample_type & PERF_SAMPLE_TIME)
+               perf_output_put(handle, data->time);
 
        if (sample_type & PERF_SAMPLE_ADDR)
-               header.size += sizeof(u64);
+               perf_output_put(handle, data->addr);
 
        if (sample_type & PERF_SAMPLE_ID)
-               header.size += sizeof(u64);
+               perf_output_put(handle, data->id);
 
        if (sample_type & PERF_SAMPLE_STREAM_ID)
-               header.size += sizeof(u64);
+               perf_output_put(handle, data->stream_id);
 
-       if (sample_type & PERF_SAMPLE_CPU) {
-               header.size += sizeof(cpu_entry);
-
-               cpu_entry.cpu = raw_smp_processor_id();
-               cpu_entry.reserved = 0;
-       }
+       if (sample_type & PERF_SAMPLE_CPU)
+               perf_output_put(handle, data->cpu_entry);
 
        if (sample_type & PERF_SAMPLE_PERIOD)
-               header.size += sizeof(u64);
+               perf_output_put(handle, data->period);
 
        if (sample_type & PERF_SAMPLE_READ)
-               header.size += perf_counter_read_size(counter);
+               perf_output_read(handle, counter);
 
        if (sample_type & PERF_SAMPLE_CALLCHAIN) {
-               callchain = perf_callchain(data->regs);
+               if (data->callchain) {
+                       int size = 1;
 
-               if (callchain) {
-                       callchain_size = (1 + callchain->nr) * sizeof(u64);
-                       header.size += callchain_size;
-               } else
-                       header.size += sizeof(u64);
+                       if (data->callchain)
+                               size += data->callchain->nr;
+
+                       size *= sizeof(u64);
+
+                       perf_output_copy(handle, data->callchain, size);
+               } else {
+                       u64 nr = 0;
+                       perf_output_put(handle, nr);
+               }
        }
 
        if (sample_type & PERF_SAMPLE_RAW) {
-               int size = sizeof(u32);
+               if (data->raw) {
+                       perf_output_put(handle, data->raw->size);
+                       perf_output_copy(handle, data->raw->data,
+                                        data->raw->size);
+               } else {
+                       struct {
+                               u32     size;
+                               u32     data;
+                       } raw = {
+                               .size = sizeof(u32),
+                               .data = 0,
+                       };
+                       perf_output_put(handle, raw);
+               }
+       }
+}
 
-               if (data->raw)
-                       size += data->raw->size;
-               else
-                       size += sizeof(u32);
+void perf_prepare_sample(struct perf_event_header *header,
+                        struct perf_sample_data *data,
+                        struct perf_counter *counter,
+                        struct pt_regs *regs)
+{
+       u64 sample_type = counter->attr.sample_type;
 
-               WARN_ON_ONCE(size & (sizeof(u64)-1));
-               header.size += size;
-       }
+       data->type = sample_type;
 
-       ret = perf_output_begin(&handle, counter, header.size, nmi, 1);
-       if (ret)
-               return;
+       header->type = PERF_EVENT_SAMPLE;
+       header->size = sizeof(*header);
 
-       perf_output_put(&handle, header);
+       header->misc = 0;
+       header->misc |= perf_misc_flags(regs);
 
-       if (sample_type & PERF_SAMPLE_IP)
-               perf_output_put(&handle, ip);
+       if (sample_type & PERF_SAMPLE_IP) {
+               data->ip = perf_instruction_pointer(regs);
 
-       if (sample_type & PERF_SAMPLE_TID)
-               perf_output_put(&handle, tid_entry);
+               header->size += sizeof(data->ip);
+       }
 
-       if (sample_type & PERF_SAMPLE_TIME)
-               perf_output_put(&handle, time);
+       if (sample_type & PERF_SAMPLE_TID) {
+               /* namespace issues */
+               data->tid_entry.pid = perf_counter_pid(counter, current);
+               data->tid_entry.tid = perf_counter_tid(counter, current);
+
+               header->size += sizeof(data->tid_entry);
+       }
+
+       if (sample_type & PERF_SAMPLE_TIME) {
+               data->time = perf_clock();
+
+               header->size += sizeof(data->time);
+       }
 
        if (sample_type & PERF_SAMPLE_ADDR)
-               perf_output_put(&handle, data->addr);
+               header->size += sizeof(data->addr);
 
        if (sample_type & PERF_SAMPLE_ID) {
-               u64 id = primary_counter_id(counter);
+               data->id = primary_counter_id(counter);
 
-               perf_output_put(&handle, id);
+               header->size += sizeof(data->id);
        }
 
-       if (sample_type & PERF_SAMPLE_STREAM_ID)
-               perf_output_put(&handle, counter->id);
+       if (sample_type & PERF_SAMPLE_STREAM_ID) {
+               data->stream_id = counter->id;
 
-       if (sample_type & PERF_SAMPLE_CPU)
-               perf_output_put(&handle, cpu_entry);
+               header->size += sizeof(data->stream_id);
+       }
+
+       if (sample_type & PERF_SAMPLE_CPU) {
+               data->cpu_entry.cpu             = raw_smp_processor_id();
+               data->cpu_entry.reserved        = 0;
+
+               header->size += sizeof(data->cpu_entry);
+       }
 
        if (sample_type & PERF_SAMPLE_PERIOD)
-               perf_output_put(&handle, data->period);
+               header->size += sizeof(data->period);
 
        if (sample_type & PERF_SAMPLE_READ)
-               perf_output_read(&handle, counter);
+               header->size += perf_counter_read_size(counter);
 
        if (sample_type & PERF_SAMPLE_CALLCHAIN) {
-               if (callchain)
-                       perf_output_copy(&handle, callchain, callchain_size);
-               else {
-                       u64 nr = 0;
-                       perf_output_put(&handle, nr);
-               }
+               int size = 1;
+
+               data->callchain = perf_callchain(regs);
+
+               if (data->callchain)
+                       size += data->callchain->nr;
+
+               header->size += size * sizeof(u64);
        }
 
        if (sample_type & PERF_SAMPLE_RAW) {
-               if (data->raw) {
-                       perf_output_put(&handle, data->raw->size);
-                       perf_output_copy(&handle, data->raw->data, data->raw->size);
-               } else {
-                       struct {
-                               u32     size;
-                               u32     data;
-                       } raw = {
-                               .size = sizeof(u32),
-                               .data = 0,
-                       };
-                       perf_output_put(&handle, raw);
-               }
+               int size = sizeof(u32);
+
+               if (data->raw)
+                       size += data->raw->size;
+               else
+                       size += sizeof(u32);
+
+               WARN_ON_ONCE(size & (sizeof(u64)-1));
+               header->size += size;
        }
+}
+
+static void perf_counter_output(struct perf_counter *counter, int nmi,
+                               struct perf_sample_data *data,
+                               struct pt_regs *regs)
+{
+       struct perf_output_handle handle;
+       struct perf_event_header header;
+
+       perf_prepare_sample(&header, data, counter, regs);
+
+       if (perf_output_begin(&handle, counter, header.size, nmi, 1))
+               return;
+
+       perf_output_sample(&handle, &header, data, counter);
 
        perf_output_end(&handle);
 }
@@ -3473,7 +3485,7 @@ static void perf_log_throttle(struct perf_counter *counter, int enable)
                        .misc = 0,
                        .size = sizeof(throttle_event),
                },
-               .time           = sched_clock(),
+               .time           = perf_clock(),
                .id             = primary_counter_id(counter),
                .stream_id      = counter->id,
        };
@@ -3493,14 +3505,16 @@ static void perf_log_throttle(struct perf_counter *counter, int enable)
  * Generic counter overflow handling, sampling.
  */
 
-int perf_counter_overflow(struct perf_counter *counter, int nmi,
-                         struct perf_sample_data *data)
+static int __perf_counter_overflow(struct perf_counter *counter, int nmi,
+                                  int throttle, struct perf_sample_data *data,
+                                  struct pt_regs *regs)
 {
        int events = atomic_read(&counter->event_limit);
-       int throttle = counter->pmu->unthrottle != NULL;
        struct hw_perf_counter *hwc = &counter->hw;
        int ret = 0;
 
+       throttle = (throttle && counter->pmu->unthrottle != NULL);
+
        if (!throttle) {
                hwc->interrupts++;
        } else {
@@ -3523,7 +3537,7 @@ int perf_counter_overflow(struct perf_counter *counter, int nmi,
        }
 
        if (counter->attr.freq) {
-               u64 now = sched_clock();
+               u64 now = perf_clock();
                s64 delta = now - hwc->freq_stamp;
 
                hwc->freq_stamp = now;
@@ -3549,10 +3563,17 @@ int perf_counter_overflow(struct perf_counter *counter, int nmi,
                        perf_counter_disable(counter);
        }
 
-       perf_counter_output(counter, nmi, data);
+       perf_counter_output(counter, nmi, data, regs);
        return ret;
 }
 
+int perf_counter_overflow(struct perf_counter *counter, int nmi,
+                         struct perf_sample_data *data,
+                         struct pt_regs *regs)
+{
+       return __perf_counter_overflow(counter, nmi, 1, data, regs);
+}
+
 /*
  * Generic software counter infrastructure
  */
@@ -3588,9 +3609,11 @@ again:
 }
 
 static void perf_swcounter_overflow(struct perf_counter *counter,
-                                   int nmi, struct perf_sample_data *data)
+                                   int nmi, struct perf_sample_data *data,
+                                   struct pt_regs *regs)
 {
        struct hw_perf_counter *hwc = &counter->hw;
+       int throttle = 0;
        u64 overflow;
 
        data->period = counter->hw.last_period;
@@ -3600,13 +3623,15 @@ static void perf_swcounter_overflow(struct perf_counter *counter,
                return;
 
        for (; overflow; overflow--) {
-               if (perf_counter_overflow(counter, nmi, data)) {
+               if (__perf_counter_overflow(counter, nmi, throttle,
+                                           data, regs)) {
                        /*
                         * We inhibit the overflow from happening when
                         * hwc->interrupts == MAX_INTERRUPTS.
                         */
                        break;
                }
+               throttle = 1;
        }
 }
 
@@ -3618,7 +3643,8 @@ static void perf_swcounter_unthrottle(struct perf_counter *counter)
 }
 
 static void perf_swcounter_add(struct perf_counter *counter, u64 nr,
-                              int nmi, struct perf_sample_data *data)
+                              int nmi, struct perf_sample_data *data,
+                              struct pt_regs *regs)
 {
        struct hw_perf_counter *hwc = &counter->hw;
 
@@ -3627,11 +3653,11 @@ static void perf_swcounter_add(struct perf_counter *counter, u64 nr,
        if (!hwc->sample_period)
                return;
 
-       if (!data->regs)
+       if (!regs)
                return;
 
        if (!atomic64_add_negative(nr, &hwc->period_left))
-               perf_swcounter_overflow(counter, nmi, data);
+               perf_swcounter_overflow(counter, nmi, data, regs);
 }
 
 static int perf_swcounter_is_counting(struct perf_counter *counter)
@@ -3690,7 +3716,8 @@ static int perf_swcounter_match(struct perf_counter *counter,
 static void perf_swcounter_ctx_event(struct perf_counter_context *ctx,
                                     enum perf_type_id type,
                                     u32 event, u64 nr, int nmi,
-                                    struct perf_sample_data *data)
+                                    struct perf_sample_data *data,
+                                    struct pt_regs *regs)
 {
        struct perf_counter *counter;
 
@@ -3699,8 +3726,8 @@ static void perf_swcounter_ctx_event(struct perf_counter_context *ctx,
 
        rcu_read_lock();
        list_for_each_entry_rcu(counter, &ctx->event_list, event_entry) {
-               if (perf_swcounter_match(counter, type, event, data->regs))
-                       perf_swcounter_add(counter, nr, nmi, data);
+               if (perf_swcounter_match(counter, type, event, regs))
+                       perf_swcounter_add(counter, nr, nmi, data, regs);
        }
        rcu_read_unlock();
 }
@@ -3721,7 +3748,8 @@ static int *perf_swcounter_recursion_context(struct perf_cpu_context *cpuctx)
 
 static void do_perf_swcounter_event(enum perf_type_id type, u32 event,
                                    u64 nr, int nmi,
-                                   struct perf_sample_data *data)
+                                   struct perf_sample_data *data,
+                                   struct pt_regs *regs)
 {
        struct perf_cpu_context *cpuctx = &get_cpu_var(perf_cpu_context);
        int *recursion = perf_swcounter_recursion_context(cpuctx);
@@ -3734,7 +3762,7 @@ static void do_perf_swcounter_event(enum perf_type_id type, u32 event,
        barrier();
 
        perf_swcounter_ctx_event(&cpuctx->ctx, type, event,
-                                nr, nmi, data);
+                                nr, nmi, data, regs);
        rcu_read_lock();
        /*
         * doesn't really matter which of the child contexts the
@@ -3742,7 +3770,7 @@ static void do_perf_swcounter_event(enum perf_type_id type, u32 event,
         */
        ctx = rcu_dereference(current->perf_counter_ctxp);
        if (ctx)
-               perf_swcounter_ctx_event(ctx, type, event, nr, nmi, data);
+               perf_swcounter_ctx_event(ctx, type, event, nr, nmi, data, regs);
        rcu_read_unlock();
 
        barrier();
@@ -3756,11 +3784,11 @@ void __perf_swcounter_event(u32 event, u64 nr, int nmi,
                            struct pt_regs *regs, u64 addr)
 {
        struct perf_sample_data data = {
-               .regs = regs,
                .addr = addr,
        };
 
-       do_perf_swcounter_event(PERF_TYPE_SOFTWARE, event, nr, nmi, &data);
+       do_perf_swcounter_event(PERF_TYPE_SOFTWARE, event, nr, nmi,
+                               &data, regs);
 }
 
 static void perf_swcounter_read(struct perf_counter *counter)
@@ -3797,6 +3825,7 @@ static enum hrtimer_restart perf_swcounter_hrtimer(struct hrtimer *hrtimer)
 {
        enum hrtimer_restart ret = HRTIMER_RESTART;
        struct perf_sample_data data;
+       struct pt_regs *regs;
        struct perf_counter *counter;
        u64 period;
 
@@ -3804,17 +3833,17 @@ static enum hrtimer_restart perf_swcounter_hrtimer(struct hrtimer *hrtimer)
        counter->pmu->read(counter);
 
        data.addr = 0;
-       data.regs = get_irq_regs();
+       regs = get_irq_regs();
        /*
         * In case we exclude kernel IPs or are somehow not in interrupt
         * context, provide the next best thing, the user IP.
         */
-       if ((counter->attr.exclude_kernel || !data.regs) &&
+       if ((counter->attr.exclude_kernel || !regs) &&
                        !counter->attr.exclude_user)
-               data.regs = task_pt_regs(current);
+               regs = task_pt_regs(current);
 
-       if (data.regs) {
-               if (perf_counter_overflow(counter, 0, &data))
+       if (regs) {
+               if (perf_counter_overflow(counter, 0, &data, regs))
                        ret = HRTIMER_NORESTART;
        }
 
@@ -3950,15 +3979,17 @@ void perf_tpcounter_event(int event_id, u64 addr, u64 count, void *record,
        };
 
        struct perf_sample_data data = {
-               .regs = get_irq_regs(),
                .addr = addr,
                .raw = &raw,
        };
 
-       if (!data.regs)
-               data.regs = task_pt_regs(current);
+       struct pt_regs *regs = get_irq_regs();
+
+       if (!regs)
+               regs = task_pt_regs(current);
 
-       do_perf_swcounter_event(PERF_TYPE_TRACEPOINT, event_id, count, 1, &data);
+       do_perf_swcounter_event(PERF_TYPE_TRACEPOINT, event_id, count, 1,
+                               &data, regs);
 }
 EXPORT_SYMBOL_GPL(perf_tpcounter_event);
 
index e1d16c9a76806ef945e4271a9cfcef9ac1a0a0d9..ac2e1dc708bdfb4f090aa1b6a743861bc5941c21 100644 (file)
@@ -48,13 +48,6 @@ static __read_mostly int sched_clock_running;
 __read_mostly int sched_clock_stable;
 
 struct sched_clock_data {
-       /*
-        * Raw spinlock - this is a special case: this might be called
-        * from within instrumentation code so we dont want to do any
-        * instrumentation ourselves.
-        */
-       raw_spinlock_t          lock;
-
        u64                     tick_raw;
        u64                     tick_gtod;
        u64                     clock;
@@ -80,7 +73,6 @@ void sched_clock_init(void)
        for_each_possible_cpu(cpu) {
                struct sched_clock_data *scd = cpu_sdc(cpu);
 
-               scd->lock = (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED;
                scd->tick_raw = 0;
                scd->tick_gtod = ktime_now;
                scd->clock = ktime_now;
@@ -109,14 +101,19 @@ static inline u64 wrap_max(u64 x, u64 y)
  *  - filter out backward motion
  *  - use the GTOD tick value to create a window to filter crazy TSC values
  */
-static u64 __update_sched_clock(struct sched_clock_data *scd, u64 now)
+static u64 sched_clock_local(struct sched_clock_data *scd)
 {
-       s64 delta = now - scd->tick_raw;
-       u64 clock, min_clock, max_clock;
+       u64 now, clock, old_clock, min_clock, max_clock;
+       s64 delta;
 
+again:
+       now = sched_clock();
+       delta = now - scd->tick_raw;
        if (unlikely(delta < 0))
                delta = 0;
 
+       old_clock = scd->clock;
+
        /*
         * scd->clock = clamp(scd->tick_gtod + delta,
         *                    max(scd->tick_gtod, scd->clock),
@@ -124,84 +121,73 @@ static u64 __update_sched_clock(struct sched_clock_data *scd, u64 now)
         */
 
        clock = scd->tick_gtod + delta;
-       min_clock = wrap_max(scd->tick_gtod, scd->clock);
-       max_clock = wrap_max(scd->clock, scd->tick_gtod + TICK_NSEC);
+       min_clock = wrap_max(scd->tick_gtod, old_clock);
+       max_clock = wrap_max(old_clock, scd->tick_gtod + TICK_NSEC);
 
        clock = wrap_max(clock, min_clock);
        clock = wrap_min(clock, max_clock);
 
-       scd->clock = clock;
+       if (cmpxchg(&scd->clock, old_clock, clock) != old_clock)
+               goto again;
 
-       return scd->clock;
+       return clock;
 }
 
-static void lock_double_clock(struct sched_clock_data *data1,
-                               struct sched_clock_data *data2)
+static u64 sched_clock_remote(struct sched_clock_data *scd)
 {
-       if (data1 < data2) {
-               __raw_spin_lock(&data1->lock);
-               __raw_spin_lock(&data2->lock);
+       struct sched_clock_data *my_scd = this_scd();
+       u64 this_clock, remote_clock;
+       u64 *ptr, old_val, val;
+
+       sched_clock_local(my_scd);
+again:
+       this_clock = my_scd->clock;
+       remote_clock = scd->clock;
+
+       /*
+        * Use the opportunity that we have both locks
+        * taken to couple the two clocks: we take the
+        * larger time as the latest time for both
+        * runqueues. (this creates monotonic movement)
+        */
+       if (likely((s64)(remote_clock - this_clock) < 0)) {
+               ptr = &scd->clock;
+               old_val = remote_clock;
+               val = this_clock;
        } else {
-               __raw_spin_lock(&data2->lock);
-               __raw_spin_lock(&data1->lock);
+               /*
+                * Should be rare, but possible:
+                */
+               ptr = &my_scd->clock;
+               old_val = this_clock;
+               val = remote_clock;
        }
+
+       if (cmpxchg(ptr, old_val, val) != old_val)
+               goto again;
+
+       return val;
 }
 
 u64 sched_clock_cpu(int cpu)
 {
-       u64 now, clock, this_clock, remote_clock;
        struct sched_clock_data *scd;
+       u64 clock;
+
+       WARN_ON_ONCE(!irqs_disabled());
 
        if (sched_clock_stable)
                return sched_clock();
 
-       scd = cpu_sdc(cpu);
-
-       /*
-        * Normally this is not called in NMI context - but if it is,
-        * trying to do any locking here is totally lethal.
-        */
-       if (unlikely(in_nmi()))
-               return scd->clock;
-
        if (unlikely(!sched_clock_running))
                return 0ull;
 
-       WARN_ON_ONCE(!irqs_disabled());
-       now = sched_clock();
-
-       if (cpu != raw_smp_processor_id()) {
-               struct sched_clock_data *my_scd = this_scd();
-
-               lock_double_clock(scd, my_scd);
-
-               this_clock = __update_sched_clock(my_scd, now);
-               remote_clock = scd->clock;
-
-               /*
-                * Use the opportunity that we have both locks
-                * taken to couple the two clocks: we take the
-                * larger time as the latest time for both
-                * runqueues. (this creates monotonic movement)
-                */
-               if (likely((s64)(remote_clock - this_clock) < 0)) {
-                       clock = this_clock;
-                       scd->clock = clock;
-               } else {
-                       /*
-                        * Should be rare, but possible:
-                        */
-                       clock = remote_clock;
-                       my_scd->clock = remote_clock;
-               }
-
-               __raw_spin_unlock(&my_scd->lock);
-       } else {
-               __raw_spin_lock(&scd->lock);
-               clock = __update_sched_clock(scd, now);
-       }
+       scd = cpu_sdc(cpu);
 
-       __raw_spin_unlock(&scd->lock);
+       if (cpu != smp_processor_id())
+               clock = sched_clock_remote(scd);
+       else
+               clock = sched_clock_local(scd);
 
        return clock;
 }
@@ -223,11 +209,9 @@ void sched_clock_tick(void)
        now_gtod = ktime_to_ns(ktime_get());
        now = sched_clock();
 
-       __raw_spin_lock(&scd->lock);
        scd->tick_raw = now;
        scd->tick_gtod = now_gtod;
-       __update_sched_clock(scd, now);
-       __raw_spin_unlock(&scd->lock);
+       sched_clock_local(scd);
 }
 
 /*
index 10d218ab69f2ba4eac39a2d07461c0b2b256de34..990b188803ced00f8b3554bb1fe570b14b716c69 100644 (file)
@@ -513,6 +513,7 @@ static void update_curr(struct cfs_rq *cfs_rq)
        if (entity_is_task(curr)) {
                struct task_struct *curtask = task_of(curr);
 
+               trace_sched_stat_runtime(curtask, delta_exec, curr->vruntime);
                cpuacct_charge(curtask, delta_exec);
                account_group_exec_runtime(curtask, delta_exec);
        }
diff --git a/tools/perf/Documentation/perf-sched.txt b/tools/perf/Documentation/perf-sched.txt
new file mode 100644 (file)
index 0000000..1ce7919
--- /dev/null
@@ -0,0 +1,41 @@
+perf-sched(1)
+==============
+
+NAME
+----
+perf-sched - Tool to trace/measure scheduler properties (latencies)
+
+SYNOPSIS
+--------
+[verse]
+'perf sched' {record|latency|replay|trace}
+
+DESCRIPTION
+-----------
+There's four variants of perf sched:
+
+  'perf sched record <command>' to record the scheduling events
+  of an arbitrary workload.
+
+  'perf sched latency' to report the per task scheduling latencies
+  and other scheduling properties of the workload.
+
+  'perf sched trace' to see a detailed trace of the workload that
+  was recorded.
+
+  'perf sched replay' to simulate the workload that was recorded
+  via perf sched record. (this is done by starting up mockup threads
+  that mimic the workload based on the events in the trace. These
+  threads can then replay the timings (CPU runtime and sleep patterns)
+  of the workload as it occured when it was recorded - and can repeat
+  it a number of times, measuring its performance.)
+
+OPTIONS
+-------
+-D::
+--dump-raw-trace=::
+        Display verbose dump of the sched data.
+
+SEE ALSO
+--------
+linkperf:perf-record[1]
diff --git a/tools/perf/Documentation/perf-trace.txt b/tools/perf/Documentation/perf-trace.txt
new file mode 100644 (file)
index 0000000..41ed753
--- /dev/null
@@ -0,0 +1,25 @@
+perf-trace(1)
+==============
+
+NAME
+----
+perf-trace - Read perf.data (created by perf record) and display trace output
+
+SYNOPSIS
+--------
+[verse]
+'perf trace' [-i <file> | --input=file] symbol_name
+
+DESCRIPTION
+-----------
+This command reads the input file and displays the trace recorded.
+
+OPTIONS
+-------
+-D::
+--dump-raw-trace=::
+        Display verbose dump of the trace data.
+
+SEE ALSO
+--------
+linkperf:perf-record[1]
index 9f8d207a91bffa2436fcbe102c2edd1b9f64105c..2cb8cc3f67722cba408559e13f2052f91e1586ab 100644 (file)
@@ -376,6 +376,7 @@ LIB_OBJS += util/trace-event-info.o
 
 BUILTIN_OBJS += builtin-annotate.o
 BUILTIN_OBJS += builtin-help.o
+BUILTIN_OBJS += builtin-sched.o
 BUILTIN_OBJS += builtin-list.o
 BUILTIN_OBJS += builtin-record.o
 BUILTIN_OBJS += builtin-report.o
index 99a12fe86e9fe4010f49439a4c154ac7ac5f6de5..2459e5a22ed88125655496c141ff396b6970b57e 100644 (file)
@@ -48,6 +48,8 @@ static int                    call_graph                      = 0;
 static int                     inherit_stat                    = 0;
 static int                     no_samples                      = 0;
 static int                     sample_address                  = 0;
+static int                     multiplex                       = 0;
+static int                     multiplex_fd                    = -1;
 
 static long                    samples;
 static struct timeval          last_read;
@@ -470,19 +472,28 @@ try_again:
         */
        if (group && group_fd == -1)
                group_fd = fd[nr_cpu][counter];
+       if (multiplex && multiplex_fd == -1)
+               multiplex_fd = fd[nr_cpu][counter];
 
-       event_array[nr_poll].fd = fd[nr_cpu][counter];
-       event_array[nr_poll].events = POLLIN;
-       nr_poll++;
-
-       mmap_array[nr_cpu][counter].counter = counter;
-       mmap_array[nr_cpu][counter].prev = 0;
-       mmap_array[nr_cpu][counter].mask = mmap_pages*page_size - 1;
-       mmap_array[nr_cpu][counter].base = mmap(NULL, (mmap_pages+1)*page_size,
-                       PROT_READ|PROT_WRITE, MAP_SHARED, fd[nr_cpu][counter], 0);
-       if (mmap_array[nr_cpu][counter].base == MAP_FAILED) {
-               error("failed to mmap with %d (%s)\n", errno, strerror(errno));
-               exit(-1);
+       if (multiplex && fd[nr_cpu][counter] != multiplex_fd) {
+               int ret;
+
+               ret = ioctl(fd[nr_cpu][counter], PERF_COUNTER_IOC_SET_OUTPUT, multiplex_fd);
+               assert(ret != -1);
+       } else {
+               event_array[nr_poll].fd = fd[nr_cpu][counter];
+               event_array[nr_poll].events = POLLIN;
+               nr_poll++;
+
+               mmap_array[nr_cpu][counter].counter = counter;
+               mmap_array[nr_cpu][counter].prev = 0;
+               mmap_array[nr_cpu][counter].mask = mmap_pages*page_size - 1;
+               mmap_array[nr_cpu][counter].base = mmap(NULL, (mmap_pages+1)*page_size,
+                               PROT_READ|PROT_WRITE, MAP_SHARED, fd[nr_cpu][counter], 0);
+               if (mmap_array[nr_cpu][counter].base == MAP_FAILED) {
+                       error("failed to mmap with %d (%s)\n", errno, strerror(errno));
+                       exit(-1);
+               }
        }
 
        ioctl(fd[nr_cpu][counter], PERF_COUNTER_IOC_ENABLE);
@@ -513,6 +524,7 @@ static int __cmd_record(int argc, const char **argv)
        pid_t pid = 0;
        int flags;
        int ret;
+       unsigned long waking = 0;
 
        page_size = sysconf(_SC_PAGE_SIZE);
        nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
@@ -614,17 +626,29 @@ static int __cmd_record(int argc, const char **argv)
                int hits = samples;
 
                for (i = 0; i < nr_cpu; i++) {
-                       for (counter = 0; counter < nr_counters; counter++)
-                               mmap_read(&mmap_array[i][counter]);
+                       for (counter = 0; counter < nr_counters; counter++) {
+                               if (mmap_array[i][counter].base)
+                                       mmap_read(&mmap_array[i][counter]);
+                       }
                }
 
                if (hits == samples) {
                        if (done)
                                break;
-                       ret = poll(event_array, nr_poll, 100);
+                       ret = poll(event_array, nr_poll, -1);
+                       waking++;
+               }
+
+               if (done) {
+                       for (i = 0; i < nr_cpu; i++) {
+                               for (counter = 0; counter < nr_counters; counter++)
+                                       ioctl(fd[i][counter], PERF_COUNTER_IOC_DISABLE);
+                       }
                }
        }
 
+       fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking);
+
        /*
         * Approximate RIP event size: 24 bytes.
         */
@@ -681,6 +705,8 @@ static const struct option options[] = {
                    "Sample addresses"),
        OPT_BOOLEAN('n', "no-samples", &no_samples,
                    "don't sample"),
+       OPT_BOOLEAN('M', "multiplex", &multiplex,
+                   "multiplex counter output in a single channel"),
        OPT_END()
 };
 
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
new file mode 100644 (file)
index 0000000..275d79c
--- /dev/null
@@ -0,0 +1,2004 @@
+#include "builtin.h"
+#include "perf.h"
+
+#include "util/util.h"
+#include "util/cache.h"
+#include "util/symbol.h"
+#include "util/thread.h"
+#include "util/header.h"
+
+#include "util/parse-options.h"
+#include "util/trace-event.h"
+
+#include "util/debug.h"
+
+#include <sys/types.h>
+#include <sys/prctl.h>
+
+#include <semaphore.h>
+#include <pthread.h>
+#include <math.h>
+
+static char                    const *input_name = "perf.data";
+static int                     input;
+static unsigned long           page_size;
+static unsigned long           mmap_window = 32;
+
+static unsigned long           total_comm = 0;
+
+static struct rb_root          threads;
+static struct thread           *last_match;
+
+static struct perf_header      *header;
+static u64                     sample_type;
+
+static char                    default_sort_order[] = "avg, max, switch, runtime";
+static char                    *sort_order = default_sort_order;
+
+#define PR_SET_NAME            15               /* Set process name */
+#define MAX_CPUS               4096
+
+#define BUG_ON(x)              assert(!(x))
+
+static u64                     run_measurement_overhead;
+static u64                     sleep_measurement_overhead;
+
+#define COMM_LEN               20
+#define SYM_LEN                        129
+
+#define MAX_PID                        65536
+
+static unsigned long           nr_tasks;
+
+struct sched_atom;
+
+struct task_desc {
+       unsigned long           nr;
+       unsigned long           pid;
+       char                    comm[COMM_LEN];
+
+       unsigned long           nr_events;
+       unsigned long           curr_event;
+       struct sched_atom       **atoms;
+
+       pthread_t               thread;
+       sem_t                   sleep_sem;
+
+       sem_t                   ready_for_work;
+       sem_t                   work_done_sem;
+
+       u64                     cpu_usage;
+};
+
+enum sched_event_type {
+       SCHED_EVENT_RUN,
+       SCHED_EVENT_SLEEP,
+       SCHED_EVENT_WAKEUP,
+};
+
+struct sched_atom {
+       enum sched_event_type   type;
+       u64                     timestamp;
+       u64                     duration;
+       unsigned long           nr;
+       int                     specific_wait;
+       sem_t                   *wait_sem;
+       struct task_desc        *wakee;
+};
+
+static struct task_desc                *pid_to_task[MAX_PID];
+
+static struct task_desc                **tasks;
+
+static pthread_mutex_t         start_work_mutex = PTHREAD_MUTEX_INITIALIZER;
+static u64                     start_time;
+
+static pthread_mutex_t         work_done_wait_mutex = PTHREAD_MUTEX_INITIALIZER;
+
+static unsigned long           nr_run_events;
+static unsigned long           nr_sleep_events;
+static unsigned long           nr_wakeup_events;
+
+static unsigned long           nr_sleep_corrections;
+static unsigned long           nr_run_events_optimized;
+
+static unsigned long           targetless_wakeups;
+static unsigned long           multitarget_wakeups;
+
+static u64                     cpu_usage;
+static u64                     runavg_cpu_usage;
+static u64                     parent_cpu_usage;
+static u64                     runavg_parent_cpu_usage;
+
+static unsigned long           nr_runs;
+static u64                     sum_runtime;
+static u64                     sum_fluct;
+static u64                     run_avg;
+
+static unsigned long           replay_repeat = 10;
+static unsigned long           nr_timestamps;
+static unsigned long           nr_unordered_timestamps;
+static unsigned long           nr_state_machine_bugs;
+static unsigned long           nr_context_switch_bugs;
+static unsigned long           nr_events;
+static unsigned long           nr_lost_chunks;
+static unsigned long           nr_lost_events;
+
+#define TASK_STATE_TO_CHAR_STR "RSDTtZX"
+
+enum thread_state {
+       THREAD_SLEEPING = 0,
+       THREAD_WAIT_CPU,
+       THREAD_SCHED_IN,
+       THREAD_IGNORE
+};
+
+struct work_atom {
+       struct list_head        list;
+       enum thread_state       state;
+       u64                     sched_out_time;
+       u64                     wake_up_time;
+       u64                     sched_in_time;
+       u64                     runtime;
+};
+
+struct work_atoms {
+       struct list_head        work_list;
+       struct thread           *thread;
+       struct rb_node          node;
+       u64                     max_lat;
+       u64                     total_lat;
+       u64                     nb_atoms;
+       u64                     total_runtime;
+};
+
+typedef int (*sort_fn_t)(struct work_atoms *, struct work_atoms *);
+
+static struct rb_root          atom_root, sorted_atom_root;
+
+static u64                     all_runtime;
+static u64                     all_count;
+
+
+static u64 get_nsecs(void)
+{
+       struct timespec ts;
+
+       clock_gettime(CLOCK_MONOTONIC, &ts);
+
+       return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
+}
+
+static void burn_nsecs(u64 nsecs)
+{
+       u64 T0 = get_nsecs(), T1;
+
+       do {
+               T1 = get_nsecs();
+       } while (T1 + run_measurement_overhead < T0 + nsecs);
+}
+
+static void sleep_nsecs(u64 nsecs)
+{
+       struct timespec ts;
+
+       ts.tv_nsec = nsecs % 999999999;
+       ts.tv_sec = nsecs / 999999999;
+
+       nanosleep(&ts, NULL);
+}
+
+static void calibrate_run_measurement_overhead(void)
+{
+       u64 T0, T1, delta, min_delta = 1000000000ULL;
+       int i;
+
+       for (i = 0; i < 10; i++) {
+               T0 = get_nsecs();
+               burn_nsecs(0);
+               T1 = get_nsecs();
+               delta = T1-T0;
+               min_delta = min(min_delta, delta);
+       }
+       run_measurement_overhead = min_delta;
+
+       printf("run measurement overhead: %Ld nsecs\n", min_delta);
+}
+
+static void calibrate_sleep_measurement_overhead(void)
+{
+       u64 T0, T1, delta, min_delta = 1000000000ULL;
+       int i;
+
+       for (i = 0; i < 10; i++) {
+               T0 = get_nsecs();
+               sleep_nsecs(10000);
+               T1 = get_nsecs();
+               delta = T1-T0;
+               min_delta = min(min_delta, delta);
+       }
+       min_delta -= 10000;
+       sleep_measurement_overhead = min_delta;
+
+       printf("sleep measurement overhead: %Ld nsecs\n", min_delta);
+}
+
+static struct sched_atom *
+get_new_event(struct task_desc *task, u64 timestamp)
+{
+       struct sched_atom *event = calloc(1, sizeof(*event));
+       unsigned long idx = task->nr_events;
+       size_t size;
+
+       event->timestamp = timestamp;
+       event->nr = idx;
+
+       task->nr_events++;
+       size = sizeof(struct sched_atom *) * task->nr_events;
+       task->atoms = realloc(task->atoms, size);
+       BUG_ON(!task->atoms);
+
+       task->atoms[idx] = event;
+
+       return event;
+}
+
+static struct sched_atom *last_event(struct task_desc *task)
+{
+       if (!task->nr_events)
+               return NULL;
+
+       return task->atoms[task->nr_events - 1];
+}
+
+static void
+add_sched_event_run(struct task_desc *task, u64 timestamp, u64 duration)
+{
+       struct sched_atom *event, *curr_event = last_event(task);
+
+       /*
+        * optimize an existing RUN event by merging this one
+        * to it:
+        */
+       if (curr_event && curr_event->type == SCHED_EVENT_RUN) {
+               nr_run_events_optimized++;
+               curr_event->duration += duration;
+               return;
+       }
+
+       event = get_new_event(task, timestamp);
+
+       event->type = SCHED_EVENT_RUN;
+       event->duration = duration;
+
+       nr_run_events++;
+}
+
+static void
+add_sched_event_wakeup(struct task_desc *task, u64 timestamp,
+                      struct task_desc *wakee)
+{
+       struct sched_atom *event, *wakee_event;
+
+       event = get_new_event(task, timestamp);
+       event->type = SCHED_EVENT_WAKEUP;
+       event->wakee = wakee;
+
+       wakee_event = last_event(wakee);
+       if (!wakee_event || wakee_event->type != SCHED_EVENT_SLEEP) {
+               targetless_wakeups++;
+               return;
+       }
+       if (wakee_event->wait_sem) {
+               multitarget_wakeups++;
+               return;
+       }
+
+       wakee_event->wait_sem = calloc(1, sizeof(*wakee_event->wait_sem));
+       sem_init(wakee_event->wait_sem, 0, 0);
+       wakee_event->specific_wait = 1;
+       event->wait_sem = wakee_event->wait_sem;
+
+       nr_wakeup_events++;
+}
+
+static void
+add_sched_event_sleep(struct task_desc *task, u64 timestamp,
+                     u64 task_state __used)
+{
+       struct sched_atom *event = get_new_event(task, timestamp);
+
+       event->type = SCHED_EVENT_SLEEP;
+
+       nr_sleep_events++;
+}
+
+static struct task_desc *register_pid(unsigned long pid, const char *comm)
+{
+       struct task_desc *task;
+
+       BUG_ON(pid >= MAX_PID);
+
+       task = pid_to_task[pid];
+
+       if (task)
+               return task;
+
+       task = calloc(1, sizeof(*task));
+       task->pid = pid;
+       task->nr = nr_tasks;
+       strcpy(task->comm, comm);
+       /*
+        * every task starts in sleeping state - this gets ignored
+        * if there's no wakeup pointing to this sleep state:
+        */
+       add_sched_event_sleep(task, 0, 0);
+
+       pid_to_task[pid] = task;
+       nr_tasks++;
+       tasks = realloc(tasks, nr_tasks*sizeof(struct task_task *));
+       BUG_ON(!tasks);
+       tasks[task->nr] = task;
+
+       if (verbose)
+               printf("registered task #%ld, PID %ld (%s)\n", nr_tasks, pid, comm);
+
+       return task;
+}
+
+
+static void print_task_traces(void)
+{
+       struct task_desc *task;
+       unsigned long i;
+
+       for (i = 0; i < nr_tasks; i++) {
+               task = tasks[i];
+               printf("task %6ld (%20s:%10ld), nr_events: %ld\n",
+                       task->nr, task->comm, task->pid, task->nr_events);
+       }
+}
+
+static void add_cross_task_wakeups(void)
+{
+       struct task_desc *task1, *task2;
+       unsigned long i, j;
+
+       for (i = 0; i < nr_tasks; i++) {
+               task1 = tasks[i];
+               j = i + 1;
+               if (j == nr_tasks)
+                       j = 0;
+               task2 = tasks[j];
+               add_sched_event_wakeup(task1, 0, task2);
+       }
+}
+
+static void
+process_sched_event(struct task_desc *this_task __used, struct sched_atom *atom)
+{
+       int ret = 0;
+       u64 now;
+       long long delta;
+
+       now = get_nsecs();
+       delta = start_time + atom->timestamp - now;
+
+       switch (atom->type) {
+               case SCHED_EVENT_RUN:
+                       burn_nsecs(atom->duration);
+                       break;
+               case SCHED_EVENT_SLEEP:
+                       if (atom->wait_sem)
+                               ret = sem_wait(atom->wait_sem);
+                       BUG_ON(ret);
+                       break;
+               case SCHED_EVENT_WAKEUP:
+                       if (atom->wait_sem)
+                               ret = sem_post(atom->wait_sem);
+                       BUG_ON(ret);
+                       break;
+               default:
+                       BUG_ON(1);
+       }
+}
+
+static u64 get_cpu_usage_nsec_parent(void)
+{
+       struct rusage ru;
+       u64 sum;
+       int err;
+
+       err = getrusage(RUSAGE_SELF, &ru);
+       BUG_ON(err);
+
+       sum =  ru.ru_utime.tv_sec*1e9 + ru.ru_utime.tv_usec*1e3;
+       sum += ru.ru_stime.tv_sec*1e9 + ru.ru_stime.tv_usec*1e3;
+
+       return sum;
+}
+
+static u64 get_cpu_usage_nsec_self(void)
+{
+       char filename [] = "/proc/1234567890/sched";
+       unsigned long msecs, nsecs;
+       char *line = NULL;
+       u64 total = 0;
+       size_t len = 0;
+       ssize_t chars;
+       FILE *file;
+       int ret;
+
+       sprintf(filename, "/proc/%d/sched", getpid());
+       file = fopen(filename, "r");
+       BUG_ON(!file);
+
+       while ((chars = getline(&line, &len, file)) != -1) {
+               ret = sscanf(line, "se.sum_exec_runtime : %ld.%06ld\n",
+                       &msecs, &nsecs);
+               if (ret == 2) {
+                       total = msecs*1e6 + nsecs;
+                       break;
+               }
+       }
+       if (line)
+               free(line);
+       fclose(file);
+
+       return total;
+}
+
+static void *thread_func(void *ctx)
+{
+       struct task_desc *this_task = ctx;
+       u64 cpu_usage_0, cpu_usage_1;
+       unsigned long i, ret;
+       char comm2[22];
+
+       sprintf(comm2, ":%s", this_task->comm);
+       prctl(PR_SET_NAME, comm2);
+
+again:
+       ret = sem_post(&this_task->ready_for_work);
+       BUG_ON(ret);
+       ret = pthread_mutex_lock(&start_work_mutex);
+       BUG_ON(ret);
+       ret = pthread_mutex_unlock(&start_work_mutex);
+       BUG_ON(ret);
+
+       cpu_usage_0 = get_cpu_usage_nsec_self();
+
+       for (i = 0; i < this_task->nr_events; i++) {
+               this_task->curr_event = i;
+               process_sched_event(this_task, this_task->atoms[i]);
+       }
+
+       cpu_usage_1 = get_cpu_usage_nsec_self();
+       this_task->cpu_usage = cpu_usage_1 - cpu_usage_0;
+
+       ret = sem_post(&this_task->work_done_sem);
+       BUG_ON(ret);
+
+       ret = pthread_mutex_lock(&work_done_wait_mutex);
+       BUG_ON(ret);
+       ret = pthread_mutex_unlock(&work_done_wait_mutex);
+       BUG_ON(ret);
+
+       goto again;
+}
+
+static void create_tasks(void)
+{
+       struct task_desc *task;
+       pthread_attr_t attr;
+       unsigned long i;
+       int err;
+
+       err = pthread_attr_init(&attr);
+       BUG_ON(err);
+       err = pthread_attr_setstacksize(&attr, (size_t)(16*1024));
+       BUG_ON(err);
+       err = pthread_mutex_lock(&start_work_mutex);
+       BUG_ON(err);
+       err = pthread_mutex_lock(&work_done_wait_mutex);
+       BUG_ON(err);
+       for (i = 0; i < nr_tasks; i++) {
+               task = tasks[i];
+               sem_init(&task->sleep_sem, 0, 0);
+               sem_init(&task->ready_for_work, 0, 0);
+               sem_init(&task->work_done_sem, 0, 0);
+               task->curr_event = 0;
+               err = pthread_create(&task->thread, &attr, thread_func, task);
+               BUG_ON(err);
+       }
+}
+
+static void wait_for_tasks(void)
+{
+       u64 cpu_usage_0, cpu_usage_1;
+       struct task_desc *task;
+       unsigned long i, ret;
+
+       start_time = get_nsecs();
+       cpu_usage = 0;
+       pthread_mutex_unlock(&work_done_wait_mutex);
+
+       for (i = 0; i < nr_tasks; i++) {
+               task = tasks[i];
+               ret = sem_wait(&task->ready_for_work);
+               BUG_ON(ret);
+               sem_init(&task->ready_for_work, 0, 0);
+       }
+       ret = pthread_mutex_lock(&work_done_wait_mutex);
+       BUG_ON(ret);
+
+       cpu_usage_0 = get_cpu_usage_nsec_parent();
+
+       pthread_mutex_unlock(&start_work_mutex);
+
+       for (i = 0; i < nr_tasks; i++) {
+               task = tasks[i];
+               ret = sem_wait(&task->work_done_sem);
+               BUG_ON(ret);
+               sem_init(&task->work_done_sem, 0, 0);
+               cpu_usage += task->cpu_usage;
+               task->cpu_usage = 0;
+       }
+
+       cpu_usage_1 = get_cpu_usage_nsec_parent();
+       if (!runavg_cpu_usage)
+               runavg_cpu_usage = cpu_usage;
+       runavg_cpu_usage = (runavg_cpu_usage*9 + cpu_usage)/10;
+
+       parent_cpu_usage = cpu_usage_1 - cpu_usage_0;
+       if (!runavg_parent_cpu_usage)
+               runavg_parent_cpu_usage = parent_cpu_usage;
+       runavg_parent_cpu_usage = (runavg_parent_cpu_usage*9 +
+                                  parent_cpu_usage)/10;
+
+       ret = pthread_mutex_lock(&start_work_mutex);
+       BUG_ON(ret);
+
+       for (i = 0; i < nr_tasks; i++) {
+               task = tasks[i];
+               sem_init(&task->sleep_sem, 0, 0);
+               task->curr_event = 0;
+       }
+}
+
+static void run_one_test(void)
+{
+       u64 T0, T1, delta, avg_delta, fluct, std_dev;
+
+       T0 = get_nsecs();
+       wait_for_tasks();
+       T1 = get_nsecs();
+
+       delta = T1 - T0;
+       sum_runtime += delta;
+       nr_runs++;
+
+       avg_delta = sum_runtime / nr_runs;
+       if (delta < avg_delta)
+               fluct = avg_delta - delta;
+       else
+               fluct = delta - avg_delta;
+       sum_fluct += fluct;
+       std_dev = sum_fluct / nr_runs / sqrt(nr_runs);
+       if (!run_avg)
+               run_avg = delta;
+       run_avg = (run_avg*9 + delta)/10;
+
+       printf("#%-3ld: %0.3f, ",
+               nr_runs, (double)delta/1000000.0);
+
+       printf("ravg: %0.2f, ",
+               (double)run_avg/1e6);
+
+       printf("cpu: %0.2f / %0.2f",
+               (double)cpu_usage/1e6, (double)runavg_cpu_usage/1e6);
+
+#if 0
+       /*
+        * rusage statistics done by the parent, these are less
+        * accurate than the sum_exec_runtime based statistics:
+        */
+       printf(" [%0.2f / %0.2f]",
+               (double)parent_cpu_usage/1e6,
+               (double)runavg_parent_cpu_usage/1e6);
+#endif
+
+       printf("\n");
+
+       if (nr_sleep_corrections)
+               printf(" (%ld sleep corrections)\n", nr_sleep_corrections);
+       nr_sleep_corrections = 0;
+}
+
+static void test_calibrations(void)
+{
+       u64 T0, T1;
+
+       T0 = get_nsecs();
+       burn_nsecs(1e6);
+       T1 = get_nsecs();
+
+       printf("the run test took %Ld nsecs\n", T1-T0);
+
+       T0 = get_nsecs();
+       sleep_nsecs(1e6);
+       T1 = get_nsecs();
+
+       printf("the sleep test took %Ld nsecs\n", T1-T0);
+}
+
+static int
+process_comm_event(event_t *event, unsigned long offset, unsigned long head)
+{
+       struct thread *thread;
+
+       thread = threads__findnew(event->comm.pid, &threads, &last_match);
+
+       dump_printf("%p [%p]: perf_event_comm: %s:%d\n",
+               (void *)(offset + head),
+               (void *)(long)(event->header.size),
+               event->comm.comm, event->comm.pid);
+
+       if (thread == NULL ||
+           thread__set_comm(thread, event->comm.comm)) {
+               dump_printf("problem processing perf_event_comm, skipping event.\n");
+               return -1;
+       }
+       total_comm++;
+
+       return 0;
+}
+
+
+struct raw_event_sample {
+       u32 size;
+       char data[0];
+};
+
+#define FILL_FIELD(ptr, field, event, data)    \
+       ptr.field = (typeof(ptr.field)) raw_field_value(event, #field, data)
+
+#define FILL_ARRAY(ptr, array, event, data)                    \
+do {                                                           \
+       void *__array = raw_field_ptr(event, #array, data);     \
+       memcpy(ptr.array, __array, sizeof(ptr.array));  \
+} while(0)
+
+#define FILL_COMMON_FIELDS(ptr, event, data)                   \
+do {                                                           \
+       FILL_FIELD(ptr, common_type, event, data);              \
+       FILL_FIELD(ptr, common_flags, event, data);             \
+       FILL_FIELD(ptr, common_preempt_count, event, data);     \
+       FILL_FIELD(ptr, common_pid, event, data);               \
+       FILL_FIELD(ptr, common_tgid, event, data);              \
+} while (0)
+
+
+
+struct trace_switch_event {
+       u32 size;
+
+       u16 common_type;
+       u8 common_flags;
+       u8 common_preempt_count;
+       u32 common_pid;
+       u32 common_tgid;
+
+       char prev_comm[16];
+       u32 prev_pid;
+       u32 prev_prio;
+       u64 prev_state;
+       char next_comm[16];
+       u32 next_pid;
+       u32 next_prio;
+};
+
+struct trace_runtime_event {
+       u32 size;
+
+       u16 common_type;
+       u8 common_flags;
+       u8 common_preempt_count;
+       u32 common_pid;
+       u32 common_tgid;
+
+       char comm[16];
+       u32 pid;
+       u64 runtime;
+       u64 vruntime;
+};
+
+struct trace_wakeup_event {
+       u32 size;
+
+       u16 common_type;
+       u8 common_flags;
+       u8 common_preempt_count;
+       u32 common_pid;
+       u32 common_tgid;
+
+       char comm[16];
+       u32 pid;
+
+       u32 prio;
+       u32 success;
+       u32 cpu;
+};
+
+struct trace_fork_event {
+       u32 size;
+
+       u16 common_type;
+       u8 common_flags;
+       u8 common_preempt_count;
+       u32 common_pid;
+       u32 common_tgid;
+
+       char parent_comm[16];
+       u32 parent_pid;
+       char child_comm[16];
+       u32 child_pid;
+};
+
+struct trace_sched_handler {
+       void (*switch_event)(struct trace_switch_event *,
+                            struct event *,
+                            int cpu,
+                            u64 timestamp,
+                            struct thread *thread);
+
+       void (*runtime_event)(struct trace_runtime_event *,
+                             struct event *,
+                             int cpu,
+                             u64 timestamp,
+                             struct thread *thread);
+
+       void (*wakeup_event)(struct trace_wakeup_event *,
+                            struct event *,
+                            int cpu,
+                            u64 timestamp,
+                            struct thread *thread);
+
+       void (*fork_event)(struct trace_fork_event *,
+                          struct event *,
+                          int cpu,
+                          u64 timestamp,
+                          struct thread *thread);
+};
+
+
+static void
+replay_wakeup_event(struct trace_wakeup_event *wakeup_event,
+                   struct event *event,
+                   int cpu __used,
+                   u64 timestamp __used,
+                   struct thread *thread __used)
+{
+       struct task_desc *waker, *wakee;
+
+       if (verbose) {
+               printf("sched_wakeup event %p\n", event);
+
+               printf(" ... pid %d woke up %s/%d\n",
+                       wakeup_event->common_pid,
+                       wakeup_event->comm,
+                       wakeup_event->pid);
+       }
+
+       waker = register_pid(wakeup_event->common_pid, "<unknown>");
+       wakee = register_pid(wakeup_event->pid, wakeup_event->comm);
+
+       add_sched_event_wakeup(waker, timestamp, wakee);
+}
+
+static u64 cpu_last_switched[MAX_CPUS];
+
+static void
+replay_switch_event(struct trace_switch_event *switch_event,
+                   struct event *event,
+                   int cpu,
+                   u64 timestamp,
+                   struct thread *thread __used)
+{
+       struct task_desc *prev, *next;
+       u64 timestamp0;
+       s64 delta;
+
+       if (verbose)
+               printf("sched_switch event %p\n", event);
+
+       if (cpu >= MAX_CPUS || cpu < 0)
+               return;
+
+       timestamp0 = cpu_last_switched[cpu];
+       if (timestamp0)
+               delta = timestamp - timestamp0;
+       else
+               delta = 0;
+
+       if (delta < 0)
+               die("hm, delta: %Ld < 0 ?\n", delta);
+
+       if (verbose) {
+               printf(" ... switch from %s/%d to %s/%d [ran %Ld nsecs]\n",
+                       switch_event->prev_comm, switch_event->prev_pid,
+                       switch_event->next_comm, switch_event->next_pid,
+                       delta);
+       }
+
+       prev = register_pid(switch_event->prev_pid, switch_event->prev_comm);
+       next = register_pid(switch_event->next_pid, switch_event->next_comm);
+
+       cpu_last_switched[cpu] = timestamp;
+
+       add_sched_event_run(prev, timestamp, delta);
+       add_sched_event_sleep(prev, timestamp, switch_event->prev_state);
+}
+
+
+static void
+replay_fork_event(struct trace_fork_event *fork_event,
+                 struct event *event,
+                 int cpu __used,
+                 u64 timestamp __used,
+                 struct thread *thread __used)
+{
+       if (verbose) {
+               printf("sched_fork event %p\n", event);
+               printf("... parent: %s/%d\n", fork_event->parent_comm, fork_event->parent_pid);
+               printf("...  child: %s/%d\n", fork_event->child_comm, fork_event->child_pid);
+       }
+       register_pid(fork_event->parent_pid, fork_event->parent_comm);
+       register_pid(fork_event->child_pid, fork_event->child_comm);
+}
+
+static struct trace_sched_handler replay_ops  = {
+       .wakeup_event           = replay_wakeup_event,
+       .switch_event           = replay_switch_event,
+       .fork_event             = replay_fork_event,
+};
+
+struct sort_dimension {
+       const char              *name;
+       sort_fn_t               cmp;
+       struct list_head        list;
+};
+
+static LIST_HEAD(cmp_pid);
+
+static int
+thread_lat_cmp(struct list_head *list, struct work_atoms *l, struct work_atoms *r)
+{
+       struct sort_dimension *sort;
+       int ret = 0;
+
+       BUG_ON(list_empty(list));
+
+       list_for_each_entry(sort, list, list) {
+               ret = sort->cmp(l, r);
+               if (ret)
+                       return ret;
+       }
+
+       return ret;
+}
+
+static struct work_atoms *
+thread_atoms_search(struct rb_root *root, struct thread *thread,
+                        struct list_head *sort_list)
+{
+       struct rb_node *node = root->rb_node;
+       struct work_atoms key = { .thread = thread };
+
+       while (node) {
+               struct work_atoms *atoms;
+               int cmp;
+
+               atoms = container_of(node, struct work_atoms, node);
+
+               cmp = thread_lat_cmp(sort_list, &key, atoms);
+               if (cmp > 0)
+                       node = node->rb_left;
+               else if (cmp < 0)
+                       node = node->rb_right;
+               else {
+                       BUG_ON(thread != atoms->thread);
+                       return atoms;
+               }
+       }
+       return NULL;
+}
+
+static void
+__thread_latency_insert(struct rb_root *root, struct work_atoms *data,
+                        struct list_head *sort_list)
+{
+       struct rb_node **new = &(root->rb_node), *parent = NULL;
+
+       while (*new) {
+               struct work_atoms *this;
+               int cmp;
+
+               this = container_of(*new, struct work_atoms, node);
+               parent = *new;
+
+               cmp = thread_lat_cmp(sort_list, data, this);
+
+               if (cmp > 0)
+                       new = &((*new)->rb_left);
+               else
+                       new = &((*new)->rb_right);
+       }
+
+       rb_link_node(&data->node, parent, new);
+       rb_insert_color(&data->node, root);
+}
+
+static void thread_atoms_insert(struct thread *thread)
+{
+       struct work_atoms *atoms;
+
+       atoms = calloc(sizeof(*atoms), 1);
+       if (!atoms)
+               die("No memory");
+
+       atoms->thread = thread;
+       INIT_LIST_HEAD(&atoms->work_list);
+       __thread_latency_insert(&atom_root, atoms, &cmp_pid);
+}
+
+static void
+latency_fork_event(struct trace_fork_event *fork_event __used,
+                  struct event *event __used,
+                  int cpu __used,
+                  u64 timestamp __used,
+                  struct thread *thread __used)
+{
+       /* should insert the newcomer */
+}
+
+__used
+static char sched_out_state(struct trace_switch_event *switch_event)
+{
+       const char *str = TASK_STATE_TO_CHAR_STR;
+
+       return str[switch_event->prev_state];
+}
+
+static void
+add_sched_out_event(struct work_atoms *atoms,
+                   char run_state,
+                   u64 timestamp)
+{
+       struct work_atom *atom;
+
+       atom = calloc(sizeof(*atom), 1);
+       if (!atom)
+               die("Non memory");
+
+       atom->sched_out_time = timestamp;
+
+       if (run_state == 'R') {
+               atom->state = THREAD_WAIT_CPU;
+               atom->wake_up_time = atom->sched_out_time;
+       }
+
+       list_add_tail(&atom->list, &atoms->work_list);
+}
+
+static void
+add_runtime_event(struct work_atoms *atoms, u64 delta, u64 timestamp __used)
+{
+       struct work_atom *atom;
+
+       BUG_ON(list_empty(&atoms->work_list));
+
+       atom = list_entry(atoms->work_list.prev, struct work_atom, list);
+
+       atom->runtime += delta;
+       atoms->total_runtime += delta;
+}
+
+static void
+add_sched_in_event(struct work_atoms *atoms, u64 timestamp)
+{
+       struct work_atom *atom;
+       u64 delta;
+
+       if (list_empty(&atoms->work_list))
+               return;
+
+       atom = list_entry(atoms->work_list.prev, struct work_atom, list);
+
+       if (atom->state != THREAD_WAIT_CPU)
+               return;
+
+       if (timestamp < atom->wake_up_time) {
+               atom->state = THREAD_IGNORE;
+               return;
+       }
+
+       atom->state = THREAD_SCHED_IN;
+       atom->sched_in_time = timestamp;
+
+       delta = atom->sched_in_time - atom->wake_up_time;
+       atoms->total_lat += delta;
+       if (delta > atoms->max_lat)
+               atoms->max_lat = delta;
+       atoms->nb_atoms++;
+}
+
+static void
+latency_switch_event(struct trace_switch_event *switch_event,
+                    struct event *event __used,
+                    int cpu,
+                    u64 timestamp,
+                    struct thread *thread __used)
+{
+       struct work_atoms *out_events, *in_events;
+       struct thread *sched_out, *sched_in;
+       u64 timestamp0;
+       s64 delta;
+
+       BUG_ON(cpu >= MAX_CPUS || cpu < 0);
+
+       timestamp0 = cpu_last_switched[cpu];
+       cpu_last_switched[cpu] = timestamp;
+       if (timestamp0)
+               delta = timestamp - timestamp0;
+       else
+               delta = 0;
+
+       if (delta < 0)
+               die("hm, delta: %Ld < 0 ?\n", delta);
+
+
+       sched_out = threads__findnew(switch_event->prev_pid, &threads, &last_match);
+       sched_in = threads__findnew(switch_event->next_pid, &threads, &last_match);
+
+       out_events = thread_atoms_search(&atom_root, sched_out, &cmp_pid);
+       if (!out_events) {
+               thread_atoms_insert(sched_out);
+               out_events = thread_atoms_search(&atom_root, sched_out, &cmp_pid);
+               if (!out_events)
+                       die("out-event: Internal tree error");
+       }
+       add_sched_out_event(out_events, sched_out_state(switch_event), timestamp);
+
+       in_events = thread_atoms_search(&atom_root, sched_in, &cmp_pid);
+       if (!in_events) {
+               thread_atoms_insert(sched_in);
+               in_events = thread_atoms_search(&atom_root, sched_in, &cmp_pid);
+               if (!in_events)
+                       die("in-event: Internal tree error");
+               /*
+                * Take came in we have not heard about yet,
+                * add in an initial atom in runnable state:
+                */
+               add_sched_out_event(in_events, 'R', timestamp);
+       }
+       add_sched_in_event(in_events, timestamp);
+}
+
+static void
+latency_runtime_event(struct trace_runtime_event *runtime_event,
+                    struct event *event __used,
+                    int cpu,
+                    u64 timestamp,
+                    struct thread *this_thread __used)
+{
+       struct work_atoms *atoms;
+       struct thread *thread;
+
+       BUG_ON(cpu >= MAX_CPUS || cpu < 0);
+
+       thread = threads__findnew(runtime_event->pid, &threads, &last_match);
+       atoms = thread_atoms_search(&atom_root, thread, &cmp_pid);
+       if (!atoms) {
+               thread_atoms_insert(thread);
+               atoms = thread_atoms_search(&atom_root, thread, &cmp_pid);
+               if (!atoms)
+                       die("in-event: Internal tree error");
+               add_sched_out_event(atoms, 'R', timestamp);
+       }
+
+       add_runtime_event(atoms, runtime_event->runtime, timestamp);
+}
+
+static void
+latency_wakeup_event(struct trace_wakeup_event *wakeup_event,
+                    struct event *__event __used,
+                    int cpu __used,
+                    u64 timestamp,
+                    struct thread *thread __used)
+{
+       struct work_atoms *atoms;
+       struct work_atom *atom;
+       struct thread *wakee;
+
+       /* Note for later, it may be interesting to observe the failing cases */
+       if (!wakeup_event->success)
+               return;
+
+       wakee = threads__findnew(wakeup_event->pid, &threads, &last_match);
+       atoms = thread_atoms_search(&atom_root, wakee, &cmp_pid);
+       if (!atoms) {
+               thread_atoms_insert(wakee);
+               atoms = thread_atoms_search(&atom_root, wakee, &cmp_pid);
+               if (!atoms)
+                       die("wakeup-event: Internal tree error");
+               add_sched_out_event(atoms, 'S', timestamp);
+       }
+
+       BUG_ON(list_empty(&atoms->work_list));
+
+       atom = list_entry(atoms->work_list.prev, struct work_atom, list);
+
+       if (atom->state != THREAD_SLEEPING)
+               nr_state_machine_bugs++;
+
+       nr_timestamps++;
+       if (atom->sched_out_time > timestamp) {
+               nr_unordered_timestamps++;
+               return;
+       }
+
+       atom->state = THREAD_WAIT_CPU;
+       atom->wake_up_time = timestamp;
+}
+
+static struct trace_sched_handler lat_ops  = {
+       .wakeup_event           = latency_wakeup_event,
+       .switch_event           = latency_switch_event,
+       .runtime_event          = latency_runtime_event,
+       .fork_event             = latency_fork_event,
+};
+
+static void output_lat_thread(struct work_atoms *work_list)
+{
+       int i;
+       int ret;
+       u64 avg;
+
+       if (!work_list->nb_atoms)
+               return;
+       /*
+        * Ignore idle threads:
+        */
+       if (!strcmp(work_list->thread->comm, "swapper"))
+               return;
+
+       all_runtime += work_list->total_runtime;
+       all_count += work_list->nb_atoms;
+
+       ret = printf("  %s:%d ", work_list->thread->comm, work_list->thread->pid);
+
+       for (i = 0; i < 24 - ret; i++)
+               printf(" ");
+
+       avg = work_list->total_lat / work_list->nb_atoms;
+
+       printf("|%11.3f ms |%9llu | avg:%9.3f ms | max:%9.3f ms |\n",
+             (double)work_list->total_runtime / 1e6,
+                work_list->nb_atoms, (double)avg / 1e6,
+                (double)work_list->max_lat / 1e6);
+}
+
+static int pid_cmp(struct work_atoms *l, struct work_atoms *r)
+{
+       if (l->thread->pid < r->thread->pid)
+               return -1;
+       if (l->thread->pid > r->thread->pid)
+               return 1;
+
+       return 0;
+}
+
+static struct sort_dimension pid_sort_dimension = {
+       .name                   = "pid",
+       .cmp                    = pid_cmp,
+};
+
+static int avg_cmp(struct work_atoms *l, struct work_atoms *r)
+{
+       u64 avgl, avgr;
+
+       if (!l->nb_atoms)
+               return -1;
+
+       if (!r->nb_atoms)
+               return 1;
+
+       avgl = l->total_lat / l->nb_atoms;
+       avgr = r->total_lat / r->nb_atoms;
+
+       if (avgl < avgr)
+               return -1;
+       if (avgl > avgr)
+               return 1;
+
+       return 0;
+}
+
+static struct sort_dimension avg_sort_dimension = {
+       .name                   = "avg",
+       .cmp                    = avg_cmp,
+};
+
+static int max_cmp(struct work_atoms *l, struct work_atoms *r)
+{
+       if (l->max_lat < r->max_lat)
+               return -1;
+       if (l->max_lat > r->max_lat)
+               return 1;
+
+       return 0;
+}
+
+static struct sort_dimension max_sort_dimension = {
+       .name                   = "max",
+       .cmp                    = max_cmp,
+};
+
+static int switch_cmp(struct work_atoms *l, struct work_atoms *r)
+{
+       if (l->nb_atoms < r->nb_atoms)
+               return -1;
+       if (l->nb_atoms > r->nb_atoms)
+               return 1;
+
+       return 0;
+}
+
+static struct sort_dimension switch_sort_dimension = {
+       .name                   = "switch",
+       .cmp                    = switch_cmp,
+};
+
+static int runtime_cmp(struct work_atoms *l, struct work_atoms *r)
+{
+       if (l->total_runtime < r->total_runtime)
+               return -1;
+       if (l->total_runtime > r->total_runtime)
+               return 1;
+
+       return 0;
+}
+
+static struct sort_dimension runtime_sort_dimension = {
+       .name                   = "runtime",
+       .cmp                    = runtime_cmp,
+};
+
+static struct sort_dimension *available_sorts[] = {
+       &pid_sort_dimension,
+       &avg_sort_dimension,
+       &max_sort_dimension,
+       &switch_sort_dimension,
+       &runtime_sort_dimension,
+};
+
+#define NB_AVAILABLE_SORTS     (int)(sizeof(available_sorts) / sizeof(struct sort_dimension *))
+
+static LIST_HEAD(sort_list);
+
+static int sort_dimension__add(char *tok, struct list_head *list)
+{
+       int i;
+
+       for (i = 0; i < NB_AVAILABLE_SORTS; i++) {
+               if (!strcmp(available_sorts[i]->name, tok)) {
+                       list_add_tail(&available_sorts[i]->list, list);
+
+                       return 0;
+               }
+       }
+
+       return -1;
+}
+
+static void setup_sorting(void);
+
+static void sort_lat(void)
+{
+       struct rb_node *node;
+
+       for (;;) {
+               struct work_atoms *data;
+               node = rb_first(&atom_root);
+               if (!node)
+                       break;
+
+               rb_erase(node, &atom_root);
+               data = rb_entry(node, struct work_atoms, node);
+               __thread_latency_insert(&sorted_atom_root, data, &sort_list);
+       }
+}
+
+static struct trace_sched_handler *trace_handler;
+
+static void
+process_sched_wakeup_event(struct raw_event_sample *raw,
+                          struct event *event,
+                          int cpu __used,
+                          u64 timestamp __used,
+                          struct thread *thread __used)
+{
+       struct trace_wakeup_event wakeup_event;
+
+       FILL_COMMON_FIELDS(wakeup_event, event, raw->data);
+
+       FILL_ARRAY(wakeup_event, comm, event, raw->data);
+       FILL_FIELD(wakeup_event, pid, event, raw->data);
+       FILL_FIELD(wakeup_event, prio, event, raw->data);
+       FILL_FIELD(wakeup_event, success, event, raw->data);
+       FILL_FIELD(wakeup_event, cpu, event, raw->data);
+
+       if (trace_handler->wakeup_event)
+               trace_handler->wakeup_event(&wakeup_event, event, cpu, timestamp, thread);
+}
+
+/*
+ * Track the current task - that way we can know whether there's any
+ * weird events, such as a task being switched away that is not current.
+ */
+static int max_cpu;
+
+static u32 curr_pid[MAX_CPUS] = { [0 ... MAX_CPUS-1] = -1 };
+
+static struct thread *curr_thread[MAX_CPUS];
+
+static char next_shortname1 = 'A';
+static char next_shortname2 = '0';
+
+static void
+map_switch_event(struct trace_switch_event *switch_event,
+                struct event *event __used,
+                int this_cpu,
+                u64 timestamp,
+                struct thread *thread __used)
+{
+       struct thread *sched_out, *sched_in;
+       int new_shortname;
+       u64 timestamp0;
+       s64 delta;
+       int cpu;
+
+       BUG_ON(this_cpu >= MAX_CPUS || this_cpu < 0);
+
+       if (this_cpu > max_cpu)
+               max_cpu = this_cpu;
+
+       timestamp0 = cpu_last_switched[this_cpu];
+       cpu_last_switched[this_cpu] = timestamp;
+       if (timestamp0)
+               delta = timestamp - timestamp0;
+       else
+               delta = 0;
+
+       if (delta < 0)
+               die("hm, delta: %Ld < 0 ?\n", delta);
+
+
+       sched_out = threads__findnew(switch_event->prev_pid, &threads, &last_match);
+       sched_in = threads__findnew(switch_event->next_pid, &threads, &last_match);
+
+       curr_thread[this_cpu] = sched_in;
+
+       printf("  ");
+
+       new_shortname = 0;
+       if (!sched_in->shortname[0]) {
+               sched_in->shortname[0] = next_shortname1;
+               sched_in->shortname[1] = next_shortname2;
+
+               if (next_shortname1 < 'Z') {
+                       next_shortname1++;
+               } else {
+                       next_shortname1='A';
+                       if (next_shortname2 < '9') {
+                               next_shortname2++;
+                       } else {
+                               next_shortname2='0';
+                       }
+               }
+               new_shortname = 1;
+       }
+
+       for (cpu = 0; cpu <= max_cpu; cpu++) {
+               if (cpu != this_cpu)
+                       printf(" ");
+               else
+                       printf("*");
+
+               if (curr_thread[cpu]) {
+                       if (curr_thread[cpu]->pid)
+                               printf("%2s ", curr_thread[cpu]->shortname);
+                       else
+                               printf(".  ");
+               } else
+                       printf("   ");
+       }
+
+       printf("  %12.6f secs ", (double)timestamp/1e9);
+       if (new_shortname) {
+               printf("%s => %s:%d\n",
+                       sched_in->shortname, sched_in->comm, sched_in->pid);
+       } else {
+               printf("\n");
+       }
+}
+
+
+static void
+process_sched_switch_event(struct raw_event_sample *raw,
+                          struct event *event,
+                          int this_cpu,
+                          u64 timestamp __used,
+                          struct thread *thread __used)
+{
+       struct trace_switch_event switch_event;
+
+       FILL_COMMON_FIELDS(switch_event, event, raw->data);
+
+       FILL_ARRAY(switch_event, prev_comm, event, raw->data);
+       FILL_FIELD(switch_event, prev_pid, event, raw->data);
+       FILL_FIELD(switch_event, prev_prio, event, raw->data);
+       FILL_FIELD(switch_event, prev_state, event, raw->data);
+       FILL_ARRAY(switch_event, next_comm, event, raw->data);
+       FILL_FIELD(switch_event, next_pid, event, raw->data);
+       FILL_FIELD(switch_event, next_prio, event, raw->data);
+
+       if (curr_pid[this_cpu] != (u32)-1) {
+               /*
+                * Are we trying to switch away a PID that is
+                * not current?
+                */
+               if (curr_pid[this_cpu] != switch_event.prev_pid)
+                       nr_context_switch_bugs++;
+       }
+       if (trace_handler->switch_event)
+               trace_handler->switch_event(&switch_event, event, this_cpu, timestamp, thread);
+
+       curr_pid[this_cpu] = switch_event.next_pid;
+}
+
+static void
+process_sched_runtime_event(struct raw_event_sample *raw,
+                          struct event *event,
+                          int cpu __used,
+                          u64 timestamp __used,
+                          struct thread *thread __used)
+{
+       struct trace_runtime_event runtime_event;
+
+       FILL_ARRAY(runtime_event, comm, event, raw->data);
+       FILL_FIELD(runtime_event, pid, event, raw->data);
+       FILL_FIELD(runtime_event, runtime, event, raw->data);
+       FILL_FIELD(runtime_event, vruntime, event, raw->data);
+
+       if (trace_handler->runtime_event)
+               trace_handler->runtime_event(&runtime_event, event, cpu, timestamp, thread);
+}
+
+static void
+process_sched_fork_event(struct raw_event_sample *raw,
+                        struct event *event,
+                        int cpu __used,
+                        u64 timestamp __used,
+                        struct thread *thread __used)
+{
+       struct trace_fork_event fork_event;
+
+       FILL_COMMON_FIELDS(fork_event, event, raw->data);
+
+       FILL_ARRAY(fork_event, parent_comm, event, raw->data);
+       FILL_FIELD(fork_event, parent_pid, event, raw->data);
+       FILL_ARRAY(fork_event, child_comm, event, raw->data);
+       FILL_FIELD(fork_event, child_pid, event, raw->data);
+
+       if (trace_handler->fork_event)
+               trace_handler->fork_event(&fork_event, event, cpu, timestamp, thread);
+}
+
+static void
+process_sched_exit_event(struct event *event,
+                        int cpu __used,
+                        u64 timestamp __used,
+                        struct thread *thread __used)
+{
+       if (verbose)
+               printf("sched_exit event %p\n", event);
+}
+
+static void
+process_raw_event(event_t *raw_event __used, void *more_data,
+                 int cpu, u64 timestamp, struct thread *thread)
+{
+       struct raw_event_sample *raw = more_data;
+       struct event *event;
+       int type;
+
+       type = trace_parse_common_type(raw->data);
+       event = trace_find_event(type);
+
+       if (!strcmp(event->name, "sched_switch"))
+               process_sched_switch_event(raw, event, cpu, timestamp, thread);
+       if (!strcmp(event->name, "sched_stat_runtime"))
+               process_sched_runtime_event(raw, event, cpu, timestamp, thread);
+       if (!strcmp(event->name, "sched_wakeup"))
+               process_sched_wakeup_event(raw, event, cpu, timestamp, thread);
+       if (!strcmp(event->name, "sched_wakeup_new"))
+               process_sched_wakeup_event(raw, event, cpu, timestamp, thread);
+       if (!strcmp(event->name, "sched_process_fork"))
+               process_sched_fork_event(raw, event, cpu, timestamp, thread);
+       if (!strcmp(event->name, "sched_process_exit"))
+               process_sched_exit_event(event, cpu, timestamp, thread);
+}
+
+static int
+process_sample_event(event_t *event, unsigned long offset, unsigned long head)
+{
+       char level;
+       int show = 0;
+       struct dso *dso = NULL;
+       struct thread *thread;
+       u64 ip = event->ip.ip;
+       u64 timestamp = -1;
+       u32 cpu = -1;
+       u64 period = 1;
+       void *more_data = event->ip.__more_data;
+       int cpumode;
+
+       thread = threads__findnew(event->ip.pid, &threads, &last_match);
+
+       if (sample_type & PERF_SAMPLE_TIME) {
+               timestamp = *(u64 *)more_data;
+               more_data += sizeof(u64);
+       }
+
+       if (sample_type & PERF_SAMPLE_CPU) {
+               cpu = *(u32 *)more_data;
+               more_data += sizeof(u32);
+               more_data += sizeof(u32); /* reserved */
+       }
+
+       if (sample_type & PERF_SAMPLE_PERIOD) {
+               period = *(u64 *)more_data;
+               more_data += sizeof(u64);
+       }
+
+       dump_printf("%p [%p]: PERF_EVENT_SAMPLE (IP, %d): %d/%d: %p period: %Ld\n",
+               (void *)(offset + head),
+               (void *)(long)(event->header.size),
+               event->header.misc,
+               event->ip.pid, event->ip.tid,
+               (void *)(long)ip,
+               (long long)period);
+
+       dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
+
+       if (thread == NULL) {
+               eprintf("problem processing %d event, skipping it.\n",
+                       event->header.type);
+               return -1;
+       }
+
+       cpumode = event->header.misc & PERF_EVENT_MISC_CPUMODE_MASK;
+
+       if (cpumode == PERF_EVENT_MISC_KERNEL) {
+               show = SHOW_KERNEL;
+               level = 'k';
+
+               dso = kernel_dso;
+
+               dump_printf(" ...... dso: %s\n", dso->name);
+
+       } else if (cpumode == PERF_EVENT_MISC_USER) {
+
+               show = SHOW_USER;
+               level = '.';
+
+       } else {
+               show = SHOW_HV;
+               level = 'H';
+
+               dso = hypervisor_dso;
+
+               dump_printf(" ...... dso: [hypervisor]\n");
+       }
+
+       if (sample_type & PERF_SAMPLE_RAW)
+               process_raw_event(event, more_data, cpu, timestamp, thread);
+
+       return 0;
+}
+
+static int
+process_event(event_t *event, unsigned long offset, unsigned long head)
+{
+       trace_event(event);
+
+       nr_events++;
+       switch (event->header.type) {
+       case PERF_EVENT_MMAP:
+               return 0;
+       case PERF_EVENT_LOST:
+               nr_lost_chunks++;
+               nr_lost_events += event->lost.lost;
+               return 0;
+
+       case PERF_EVENT_COMM:
+               return process_comm_event(event, offset, head);
+
+       case PERF_EVENT_EXIT ... PERF_EVENT_READ:
+               return 0;
+
+       case PERF_EVENT_SAMPLE:
+               return process_sample_event(event, offset, head);
+
+       case PERF_EVENT_MAX:
+       default:
+               return -1;
+       }
+
+       return 0;
+}
+
+static int read_events(void)
+{
+       int ret, rc = EXIT_FAILURE;
+       unsigned long offset = 0;
+       unsigned long head = 0;
+       struct stat perf_stat;
+       event_t *event;
+       uint32_t size;
+       char *buf;
+
+       trace_report();
+       register_idle_thread(&threads, &last_match);
+
+       input = open(input_name, O_RDONLY);
+       if (input < 0) {
+               perror("failed to open file");
+               exit(-1);
+       }
+
+       ret = fstat(input, &perf_stat);
+       if (ret < 0) {
+               perror("failed to stat file");
+               exit(-1);
+       }
+
+       if (!perf_stat.st_size) {
+               fprintf(stderr, "zero-sized file, nothing to do!\n");
+               exit(0);
+       }
+       header = perf_header__read(input);
+       head = header->data_offset;
+       sample_type = perf_header__sample_type(header);
+
+       if (!(sample_type & PERF_SAMPLE_RAW))
+               die("No trace sample to read. Did you call perf record "
+                   "without -R?");
+
+       if (load_kernel() < 0) {
+               perror("failed to load kernel symbols");
+               return EXIT_FAILURE;
+       }
+
+remap:
+       buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
+                          MAP_SHARED, input, offset);
+       if (buf == MAP_FAILED) {
+               perror("failed to mmap file");
+               exit(-1);
+       }
+
+more:
+       event = (event_t *)(buf + head);
+
+       size = event->header.size;
+       if (!size)
+               size = 8;
+
+       if (head + event->header.size >= page_size * mmap_window) {
+               unsigned long shift = page_size * (head / page_size);
+               int res;
+
+               res = munmap(buf, page_size * mmap_window);
+               assert(res == 0);
+
+               offset += shift;
+               head -= shift;
+               goto remap;
+       }
+
+       size = event->header.size;
+
+
+       if (!size || process_event(event, offset, head) < 0) {
+
+               /*
+                * assume we lost track of the stream, check alignment, and
+                * increment a single u64 in the hope to catch on again 'soon'.
+                */
+
+               if (unlikely(head & 7))
+                       head &= ~7ULL;
+
+               size = 8;
+       }
+
+       head += size;
+
+       if (offset + head < (unsigned long)perf_stat.st_size)
+               goto more;
+
+       rc = EXIT_SUCCESS;
+       close(input);
+
+       return rc;
+}
+
+static void print_bad_events(void)
+{
+       if (nr_unordered_timestamps && nr_timestamps) {
+               printf("  INFO: %.3f%% unordered timestamps (%ld out of %ld)\n",
+                       (double)nr_unordered_timestamps/(double)nr_timestamps*100.0,
+                       nr_unordered_timestamps, nr_timestamps);
+       }
+       if (nr_lost_events && nr_events) {
+               printf("  INFO: %.3f%% lost events (%ld out of %ld, in %ld chunks)\n",
+                       (double)nr_lost_events/(double)nr_events*100.0,
+                       nr_lost_events, nr_events, nr_lost_chunks);
+       }
+       if (nr_state_machine_bugs && nr_timestamps) {
+               printf("  INFO: %.3f%% state machine bugs (%ld out of %ld)",
+                       (double)nr_state_machine_bugs/(double)nr_timestamps*100.0,
+                       nr_state_machine_bugs, nr_timestamps);
+               if (nr_lost_events)
+                       printf(" (due to lost events?)");
+               printf("\n");
+       }
+       if (nr_context_switch_bugs && nr_timestamps) {
+               printf("  INFO: %.3f%% context switch bugs (%ld out of %ld)",
+                       (double)nr_context_switch_bugs/(double)nr_timestamps*100.0,
+                       nr_context_switch_bugs, nr_timestamps);
+               if (nr_lost_events)
+                       printf(" (due to lost events?)");
+               printf("\n");
+       }
+}
+
+static void __cmd_lat(void)
+{
+       struct rb_node *next;
+
+       setup_pager();
+       read_events();
+       sort_lat();
+
+       printf("\n -----------------------------------------------------------------------------------------\n");
+       printf("  Task                  |   Runtime ms  | Switches | Average delay ms | Maximum delay ms |\n");
+       printf(" -----------------------------------------------------------------------------------------\n");
+
+       next = rb_first(&sorted_atom_root);
+
+       while (next) {
+               struct work_atoms *work_list;
+
+               work_list = rb_entry(next, struct work_atoms, node);
+               output_lat_thread(work_list);
+               next = rb_next(next);
+       }
+
+       printf(" -----------------------------------------------------------------------------------------\n");
+       printf("  TOTAL:                |%11.3f ms |%9Ld |\n",
+               (double)all_runtime/1e6, all_count);
+
+       printf(" ---------------------------------------------------\n");
+
+       print_bad_events();
+       printf("\n");
+
+}
+
+static struct trace_sched_handler map_ops  = {
+       .wakeup_event           = NULL,
+       .switch_event           = map_switch_event,
+       .runtime_event          = NULL,
+       .fork_event             = NULL,
+};
+
+static void __cmd_map(void)
+{
+       max_cpu = sysconf(_SC_NPROCESSORS_CONF);
+
+       setup_pager();
+       read_events();
+       print_bad_events();
+}
+
+static void __cmd_replay(void)
+{
+       unsigned long i;
+
+       calibrate_run_measurement_overhead();
+       calibrate_sleep_measurement_overhead();
+
+       test_calibrations();
+
+       read_events();
+
+       printf("nr_run_events:        %ld\n", nr_run_events);
+       printf("nr_sleep_events:      %ld\n", nr_sleep_events);
+       printf("nr_wakeup_events:     %ld\n", nr_wakeup_events);
+
+       if (targetless_wakeups)
+               printf("target-less wakeups:  %ld\n", targetless_wakeups);
+       if (multitarget_wakeups)
+               printf("multi-target wakeups: %ld\n", multitarget_wakeups);
+       if (nr_run_events_optimized)
+               printf("run atoms optimized: %ld\n",
+                       nr_run_events_optimized);
+
+       print_task_traces();
+       add_cross_task_wakeups();
+
+       create_tasks();
+       printf("------------------------------------------------------------\n");
+       for (i = 0; i < replay_repeat; i++)
+               run_one_test();
+}
+
+
+static const char * const sched_usage[] = {
+       "perf sched [<options>] {record|latency|map|replay|trace}",
+       NULL
+};
+
+static const struct option sched_options[] = {
+       OPT_STRING('i', "input", &input_name, "file",
+                   "input file name"),
+       OPT_BOOLEAN('v', "verbose", &verbose,
+                   "be more verbose (show symbol address, etc)"),
+       OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
+                   "dump raw trace in ASCII"),
+       OPT_END()
+};
+
+static const char * const latency_usage[] = {
+       "perf sched latency [<options>]",
+       NULL
+};
+
+static const struct option latency_options[] = {
+       OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
+                  "sort by key(s): runtime, switch, avg, max"),
+       OPT_BOOLEAN('v', "verbose", &verbose,
+                   "be more verbose (show symbol address, etc)"),
+       OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
+                   "dump raw trace in ASCII"),
+       OPT_END()
+};
+
+static const char * const replay_usage[] = {
+       "perf sched replay [<options>]",
+       NULL
+};
+
+static const struct option replay_options[] = {
+       OPT_INTEGER('r', "repeat", &replay_repeat,
+                   "repeat the workload replay N times (-1: infinite)"),
+       OPT_BOOLEAN('v', "verbose", &verbose,
+                   "be more verbose (show symbol address, etc)"),
+       OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
+                   "dump raw trace in ASCII"),
+       OPT_END()
+};
+
+static void setup_sorting(void)
+{
+       char *tmp, *tok, *str = strdup(sort_order);
+
+       for (tok = strtok_r(str, ", ", &tmp);
+                       tok; tok = strtok_r(NULL, ", ", &tmp)) {
+               if (sort_dimension__add(tok, &sort_list) < 0) {
+                       error("Unknown --sort key: `%s'", tok);
+                       usage_with_options(latency_usage, latency_options);
+               }
+       }
+
+       free(str);
+
+       sort_dimension__add((char *)"pid", &cmp_pid);
+}
+
+static const char *record_args[] = {
+       "record",
+       "-a",
+       "-R",
+       "-M",
+       "-f",
+       "-m", "1024",
+       "-c", "1",
+       "-e", "sched:sched_switch:r",
+       "-e", "sched:sched_stat_wait:r",
+       "-e", "sched:sched_stat_sleep:r",
+       "-e", "sched:sched_stat_iowait:r",
+       "-e", "sched:sched_stat_runtime:r",
+       "-e", "sched:sched_process_exit:r",
+       "-e", "sched:sched_process_fork:r",
+       "-e", "sched:sched_wakeup:r",
+       "-e", "sched:sched_migrate_task:r",
+};
+
+static int __cmd_record(int argc, const char **argv)
+{
+       unsigned int rec_argc, i, j;
+       const char **rec_argv;
+
+       rec_argc = ARRAY_SIZE(record_args) + argc - 1;
+       rec_argv = calloc(rec_argc + 1, sizeof(char *));
+
+       for (i = 0; i < ARRAY_SIZE(record_args); i++)
+               rec_argv[i] = strdup(record_args[i]);
+
+       for (j = 1; j < (unsigned int)argc; j++, i++)
+               rec_argv[i] = argv[j];
+
+       BUG_ON(i != rec_argc);
+
+       return cmd_record(i, rec_argv, NULL);
+}
+
+int cmd_sched(int argc, const char **argv, const char *prefix __used)
+{
+       symbol__init();
+       page_size = getpagesize();
+
+       argc = parse_options(argc, argv, sched_options, sched_usage,
+                            PARSE_OPT_STOP_AT_NON_OPTION);
+       if (!argc)
+               usage_with_options(sched_usage, sched_options);
+
+       if (!strncmp(argv[0], "rec", 3)) {
+               return __cmd_record(argc, argv);
+       } else if (!strncmp(argv[0], "lat", 3)) {
+               trace_handler = &lat_ops;
+               if (argc > 1) {
+                       argc = parse_options(argc, argv, latency_options, latency_usage, 0);
+                       if (argc)
+                               usage_with_options(latency_usage, latency_options);
+               }
+               setup_sorting();
+               __cmd_lat();
+       } else if (!strcmp(argv[0], "map")) {
+               trace_handler = &map_ops;
+               setup_sorting();
+               __cmd_map();
+       } else if (!strncmp(argv[0], "rep", 3)) {
+               trace_handler = &replay_ops;
+               if (argc) {
+                       argc = parse_options(argc, argv, replay_options, replay_usage, 0);
+                       if (argc)
+                               usage_with_options(replay_usage, replay_options);
+               }
+               __cmd_replay();
+       } else if (!strcmp(argv[0], "trace")) {
+               /*
+                * Aliased to 'perf trace' for now:
+                */
+               return cmd_trace(argc, argv, prefix);
+       } else {
+               usage_with_options(sched_usage, sched_options);
+       }
+
+       return 0;
+}
index 3a63e41fb44e79adda4a6d84193668d58711ed9e..b09cadbd76b17137c240d9a5a0291dd3176a82a3 100644 (file)
@@ -16,12 +16,13 @@ extern int check_pager_config(const char *cmd);
 
 extern int cmd_annotate(int argc, const char **argv, const char *prefix);
 extern int cmd_help(int argc, const char **argv, const char *prefix);
+extern int cmd_sched(int argc, const char **argv, const char *prefix);
+extern int cmd_list(int argc, const char **argv, const char *prefix);
 extern int cmd_record(int argc, const char **argv, const char *prefix);
 extern int cmd_report(int argc, const char **argv, const char *prefix);
 extern int cmd_stat(int argc, const char **argv, const char *prefix);
 extern int cmd_top(int argc, const char **argv, const char *prefix);
-extern int cmd_version(int argc, const char **argv, const char *prefix);
-extern int cmd_list(int argc, const char **argv, const char *prefix);
 extern int cmd_trace(int argc, const char **argv, const char *prefix);
+extern int cmd_version(int argc, const char **argv, const char *prefix);
 
 #endif
index eebce30afbc094ec3acbf1464e6bc76dcd5ec882..3133c74729dd19a5c0f9cfb11038e1239ce18cf7 100644 (file)
@@ -4,7 +4,9 @@
 #
 perf-annotate                  mainporcelain common
 perf-list                      mainporcelain common
+perf-sched                     mainporcelain common
 perf-record                    mainporcelain common
 perf-report                    mainporcelain common
 perf-stat                      mainporcelain common
 perf-top                       mainporcelain common
+perf-trace                     mainporcelain common
index fe4589dde95086c43e9f9081539cf6cb11e58135..c972d1c354896b709e065e39d4c0d04ba22b1886 100644 (file)
@@ -293,6 +293,7 @@ static void handle_internal_command(int argc, const char **argv)
                { "annotate", cmd_annotate, 0 },
                { "version", cmd_version, 0 },
                { "trace", cmd_trace, 0 },
+               { "sched", cmd_sched, 0 },
        };
        unsigned int i;
        static const char ext[] = STRIP_EXTENSION;
index fa2d4e91d3291d0814a03b20bd7d12c9af66afd2..2495529cae7dada7cd11ff1d42397186141fd4f5 100644 (file)
@@ -52,7 +52,7 @@ struct lost_event {
  */
 struct read_event {
        struct perf_event_header header;
-       u32 pid,tid;
+       u32 pid, tid;
        u64 value;
        u64 time_enabled;
        u64 time_running;
index a587d41ae3c94c6809cb921886f696556ff4425c..a9bdcab8c0702c5e0fd2134955b43bf8aa1b7d8e 100644 (file)
@@ -18,6 +18,12 @@ struct event_symbol {
        const char      *alias;
 };
 
+enum event_result {
+       EVT_FAILED,
+       EVT_HANDLED,
+       EVT_HANDLED_ALL
+};
+
 char debugfs_path[MAXPATHLEN];
 
 #define CHW(x) .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_##x
@@ -139,7 +145,7 @@ static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
           (strcmp(evt_dirent.d_name, "..")) &&                                \
           (!tp_event_has_id(&sys_dirent, &evt_dirent)))
 
-#define MAX_EVENT_LENGTH 30
+#define MAX_EVENT_LENGTH 512
 
 int valid_debugfs_mount(const char *debugfs)
 {
@@ -344,7 +350,7 @@ static int parse_aliases(const char **str, const char *names[][MAX_ALIASES], int
        return -1;
 }
 
-static int
+static enum event_result
 parse_generic_hw_event(const char **str, struct perf_counter_attr *attr)
 {
        const char *s = *str;
@@ -356,7 +362,7 @@ parse_generic_hw_event(const char **str, struct perf_counter_attr *attr)
         * then bail out:
         */
        if (cache_type == -1)
-               return 0;
+               return EVT_FAILED;
 
        while ((cache_op == -1 || cache_result == -1) && *s == '-') {
                ++s;
@@ -402,27 +408,115 @@ parse_generic_hw_event(const char **str, struct perf_counter_attr *attr)
        attr->type = PERF_TYPE_HW_CACHE;
 
        *str = s;
-       return 1;
+       return EVT_HANDLED;
+}
+
+static enum event_result
+parse_single_tracepoint_event(char *sys_name,
+                             const char *evt_name,
+                             unsigned int evt_length,
+                             char *flags,
+                             struct perf_counter_attr *attr,
+                             const char **strp)
+{
+       char evt_path[MAXPATHLEN];
+       char id_buf[4];
+       u64 id;
+       int fd;
+
+       if (flags) {
+               if (!strncmp(flags, "record", strlen(flags))) {
+                       attr->sample_type |= PERF_SAMPLE_RAW;
+                       attr->sample_type |= PERF_SAMPLE_TIME;
+                       attr->sample_type |= PERF_SAMPLE_CPU;
+               }
+       }
+
+       snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
+                sys_name, evt_name);
+
+       fd = open(evt_path, O_RDONLY);
+       if (fd < 0)
+               return EVT_FAILED;
+
+       if (read(fd, id_buf, sizeof(id_buf)) < 0) {
+               close(fd);
+               return EVT_FAILED;
+       }
+
+       close(fd);
+       id = atoll(id_buf);
+       attr->config = id;
+       attr->type = PERF_TYPE_TRACEPOINT;
+       *strp = evt_name + evt_length;
+
+       return EVT_HANDLED;
+}
+
+/* sys + ':' + event + ':' + flags*/
+#define MAX_EVOPT_LEN  (MAX_EVENT_LENGTH * 2 + 2 + 128)
+static enum event_result
+parse_subsystem_tracepoint_event(char *sys_name, char *flags)
+{
+       char evt_path[MAXPATHLEN];
+       struct dirent *evt_ent;
+       DIR *evt_dir;
+
+       snprintf(evt_path, MAXPATHLEN, "%s/%s", debugfs_path, sys_name);
+       evt_dir = opendir(evt_path);
+
+       if (!evt_dir) {
+               perror("Can't open event dir");
+               return EVT_FAILED;
+       }
+
+       while ((evt_ent = readdir(evt_dir))) {
+               char event_opt[MAX_EVOPT_LEN + 1];
+               int len;
+               unsigned int rem = MAX_EVOPT_LEN;
+
+               if (!strcmp(evt_ent->d_name, ".")
+                   || !strcmp(evt_ent->d_name, "..")
+                   || !strcmp(evt_ent->d_name, "enable")
+                   || !strcmp(evt_ent->d_name, "filter"))
+                       continue;
+
+               len = snprintf(event_opt, MAX_EVOPT_LEN, "%s:%s", sys_name,
+                              evt_ent->d_name);
+               if (len < 0)
+                       return EVT_FAILED;
+
+               rem -= len;
+               if (flags) {
+                       if (rem < strlen(flags) + 1)
+                               return EVT_FAILED;
+
+                       strcat(event_opt, ":");
+                       strcat(event_opt, flags);
+               }
+
+               if (parse_events(NULL, event_opt, 0))
+                       return EVT_FAILED;
+       }
+
+       return EVT_HANDLED_ALL;
 }
 
-static int parse_tracepoint_event(const char **strp,
+
+static enum event_result parse_tracepoint_event(const char **strp,
                                    struct perf_counter_attr *attr)
 {
        const char *evt_name;
        char *flags;
        char sys_name[MAX_EVENT_LENGTH];
-       char id_buf[4];
-       int fd;
        unsigned int sys_length, evt_length;
-       u64 id;
-       char evt_path[MAXPATHLEN];
 
        if (valid_debugfs_mount(debugfs_path))
                return 0;
 
        evt_name = strchr(*strp, ':');
        if (!evt_name)
-               return 0;
+               return EVT_FAILED;
 
        sys_length = evt_name - *strp;
        if (sys_length >= MAX_EVENT_LENGTH)
@@ -434,32 +528,22 @@ static int parse_tracepoint_event(const char **strp,
 
        flags = strchr(evt_name, ':');
        if (flags) {
-               *flags = '\0';
+               /* split it out: */
+               evt_name = strndup(evt_name, flags - evt_name);
                flags++;
-               if (!strncmp(flags, "record", strlen(flags)))
-                       attr->sample_type |= PERF_SAMPLE_RAW;
        }
 
        evt_length = strlen(evt_name);
        if (evt_length >= MAX_EVENT_LENGTH)
-               return 0;
+               return EVT_FAILED;
 
-       snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
-                sys_name, evt_name);
-       fd = open(evt_path, O_RDONLY);
-       if (fd < 0)
-               return 0;
-
-       if (read(fd, id_buf, sizeof(id_buf)) < 0) {
-               close(fd);
-               return 0;
-       }
-       close(fd);
-       id = atoll(id_buf);
-       attr->config = id;
-       attr->type = PERF_TYPE_TRACEPOINT;
-       *strp = evt_name + evt_length;
-       return 1;
+       if (!strcmp(evt_name, "*")) {
+               *strp = evt_name + evt_length;
+               return parse_subsystem_tracepoint_event(sys_name, flags);
+       } else
+               return parse_single_tracepoint_event(sys_name, evt_name,
+                                                    evt_length, flags,
+                                                    attr, strp);
 }
 
 static int check_events(const char *str, unsigned int i)
@@ -477,7 +561,7 @@ static int check_events(const char *str, unsigned int i)
        return 0;
 }
 
-static int
+static enum event_result
 parse_symbolic_event(const char **strp, struct perf_counter_attr *attr)
 {
        const char *str = *strp;
@@ -490,31 +574,32 @@ parse_symbolic_event(const char **strp, struct perf_counter_attr *attr)
                        attr->type = event_symbols[i].type;
                        attr->config = event_symbols[i].config;
                        *strp = str + n;
-                       return 1;
+                       return EVT_HANDLED;
                }
        }
-       return 0;
+       return EVT_FAILED;
 }
 
-static int parse_raw_event(const char **strp, struct perf_counter_attr *attr)
+static enum event_result
+parse_raw_event(const char **strp, struct perf_counter_attr *attr)
 {
        const char *str = *strp;
        u64 config;
        int n;
 
        if (*str != 'r')
-               return 0;
+               return EVT_FAILED;
        n = hex2u64(str + 1, &config);
        if (n > 0) {
                *strp = str + n + 1;
                attr->type = PERF_TYPE_RAW;
                attr->config = config;
-               return 1;
+               return EVT_HANDLED;
        }
-       return 0;
+       return EVT_FAILED;
 }
 
-static int
+static enum event_result
 parse_numeric_event(const char **strp, struct perf_counter_attr *attr)
 {
        const char *str = *strp;
@@ -530,13 +615,13 @@ parse_numeric_event(const char **strp, struct perf_counter_attr *attr)
                        attr->type = type;
                        attr->config = config;
                        *strp = endp;
-                       return 1;
+                       return EVT_HANDLED;
                }
        }
-       return 0;
+       return EVT_FAILED;
 }
 
-static int
+static enum event_result
 parse_event_modifier(const char **strp, struct perf_counter_attr *attr)
 {
        const char *str = *strp;
@@ -569,37 +654,60 @@ parse_event_modifier(const char **strp, struct perf_counter_attr *attr)
  * Each event can have multiple symbolic names.
  * Symbolic names are (almost) exactly matched.
  */
-static int parse_event_symbols(const char **str, struct perf_counter_attr *attr)
+static enum event_result
+parse_event_symbols(const char **str, struct perf_counter_attr *attr)
 {
-       if (!(parse_tracepoint_event(str, attr) ||
-             parse_raw_event(str, attr) ||
-             parse_numeric_event(str, attr) ||
-             parse_symbolic_event(str, attr) ||
-             parse_generic_hw_event(str, attr)))
-               return 0;
+       enum event_result ret;
+
+       ret = parse_tracepoint_event(str, attr);
+       if (ret != EVT_FAILED)
+               goto modifier;
+
+       ret = parse_raw_event(str, attr);
+       if (ret != EVT_FAILED)
+               goto modifier;
 
+       ret = parse_numeric_event(str, attr);
+       if (ret != EVT_FAILED)
+               goto modifier;
+
+       ret = parse_symbolic_event(str, attr);
+       if (ret != EVT_FAILED)
+               goto modifier;
+
+       ret = parse_generic_hw_event(str, attr);
+       if (ret != EVT_FAILED)
+               goto modifier;
+
+       return EVT_FAILED;
+
+modifier:
        parse_event_modifier(str, attr);
 
-       return 1;
+       return ret;
 }
 
 int parse_events(const struct option *opt __used, const char *str, int unset __used)
 {
        struct perf_counter_attr attr;
+       enum event_result ret;
 
        for (;;) {
                if (nr_counters == MAX_COUNTERS)
                        return -1;
 
                memset(&attr, 0, sizeof(attr));
-               if (!parse_event_symbols(&str, &attr))
+               ret = parse_event_symbols(&str, &attr);
+               if (ret == EVT_FAILED)
                        return -1;
 
                if (!(*str == 0 || *str == ',' || isspace(*str)))
                        return -1;
 
-               attrs[nr_counters] = attr;
-               nr_counters++;
+               if (ret != EVT_HANDLED_ALL) {
+                       attrs[nr_counters] = attr;
+                       nr_counters++;
+               }
 
                if (*str == 0)
                        break;
index 7635928ca278b4b5da0fbecc22c77932e9810f5c..45efb5db0d19819f281f75b17541dd9ebb76b8ad 100644 (file)
@@ -8,7 +8,7 @@
 
 static struct thread *thread__new(pid_t pid)
 {
-       struct thread *self = malloc(sizeof(*self));
+       struct thread *self = calloc(1, sizeof(*self));
 
        if (self != NULL) {
                self->pid = pid;
@@ -85,7 +85,7 @@ register_idle_thread(struct rb_root *threads, struct thread **last_match)
 {
        struct thread *thread = threads__findnew(0, threads, last_match);
 
-       if (!thread || thread__set_comm(thread, "[init]")) {
+       if (!thread || thread__set_comm(thread, "swapper")) {
                fprintf(stderr, "problem inserting idle task.\n");
                exit(-1);
        }
index 634f2809a342310ba0d1e95d45baafb81e7856df..32aea3c1c2ad6efd174f6f67843134d033853fba 100644 (file)
@@ -4,10 +4,11 @@
 #include "symbol.h"
 
 struct thread {
-       struct rb_node   rb_node;
-       struct list_head maps;
-       pid_t            pid;
-       char             *comm;
+       struct rb_node          rb_node;
+       struct list_head        maps;
+       pid_t                   pid;
+       char                    shortname[3];
+       char                    *comm;
 };
 
 int thread__set_comm(struct thread *self, const char *comm);
index 6c9302a7274cd6f243bae40f08d07d40501e692c..1fd824c1f1c48e2ffc9224c4185b7ff59883bf2e 100644 (file)
@@ -458,7 +458,7 @@ static void read_proc_kallsyms(void)
 static void read_ftrace_printk(void)
 {
        unsigned int size, check_size;
-       const char *path;
+       char *path;
        struct stat st;
        int ret;
 
@@ -468,14 +468,15 @@ static void read_ftrace_printk(void)
                /* not found */
                size = 0;
                write_or_die(&size, 4);
-               return;
+               goto out;
        }
        size = get_size(path);
        write_or_die(&size, 4);
        check_size = copy_file(path);
        if (size != check_size)
                die("error in size of file '%s'", path);
-
+out:
+       put_tracing_file(path);
 }
 
 static struct tracepoint_path *
index 629e602d940518b9ffefa6e08aacfec661452f42..f6a8437141c8f464de406e1947d0a3c557716607 100644 (file)
@@ -1776,6 +1776,29 @@ static unsigned long long read_size(void *ptr, int size)
        }
 }
 
+unsigned long long
+raw_field_value(struct event *event, const char *name, void *data)
+{
+       struct format_field *field;
+
+       field = find_any_field(event, name);
+       if (!field)
+               return 0ULL;
+
+       return read_size(data + field->offset, field->size);
+}
+
+void *raw_field_ptr(struct event *event, const char *name, void *data)
+{
+       struct format_field *field;
+
+       field = find_any_field(event, name);
+       if (!field)
+               return NULL;
+
+       return data + field->offset;
+}
+
 static int get_common_info(const char *type, int *offset, int *size)
 {
        struct event *event;
@@ -1799,7 +1822,7 @@ static int get_common_info(const char *type, int *offset, int *size)
        return 0;
 }
 
-static int parse_common_type(void *data)
+int trace_parse_common_type(void *data)
 {
        static int type_offset;
        static int type_size;
@@ -1832,7 +1855,7 @@ static int parse_common_pid(void *data)
        return read_size(data + pid_offset, pid_size);
 }
 
-static struct event *find_event(int id)
+struct event *trace_find_event(int id)
 {
        struct event *event;
 
@@ -2420,8 +2443,8 @@ get_return_for_leaf(int cpu, int cur_pid, unsigned long long cur_func,
        int type;
        int pid;
 
-       type = parse_common_type(next->data);
-       event = find_event(type);
+       type = trace_parse_common_type(next->data);
+       event = trace_find_event(type);
        if (!event)
                return NULL;
 
@@ -2502,8 +2525,8 @@ print_graph_entry_leaf(struct event *event, void *data, struct record *ret_rec)
        int type;
        int i;
 
-       type = parse_common_type(ret_rec->data);
-       ret_event = find_event(type);
+       type = trace_parse_common_type(ret_rec->data);
+       ret_event = trace_find_event(type);
 
        field = find_field(ret_event, "rettime");
        if (!field)
@@ -2696,11 +2719,13 @@ void print_event(int cpu, void *data, int size, unsigned long long nsecs,
        nsecs -= secs * NSECS_PER_SEC;
        usecs = nsecs / NSECS_PER_USEC;
 
-       type = parse_common_type(data);
+       type = trace_parse_common_type(data);
 
-       event = find_event(type);
-       if (!event)
-               die("ug! no event found for type %d", type);
+       event = trace_find_event(type);
+       if (!event) {
+               printf("ug! no event found for type %d\n", type);
+               return;
+       }
 
        pid = parse_common_pid(data);
 
index a1217a10632f4ec18b4bfa3e5bfcb9372f2ac499..1b5c847d2c223f96a42f9f4a49a5a1afbb4aead4 100644 (file)
@@ -458,12 +458,13 @@ struct record *trace_read_data(int cpu)
        return data;
 }
 
-void trace_report (void)
+void trace_report(void)
 {
        const char *input_file = "trace.info";
        char buf[BUFSIZ];
        char test[] = { 23, 8, 68 };
        char *version;
+       int show_version = 0;
        int show_funcs = 0;
        int show_printk = 0;
 
@@ -480,7 +481,8 @@ void trace_report (void)
                die("not a trace file (missing tracing)");
 
        version = read_string();
-       printf("version = %s\n", version);
+       if (show_version)
+               printf("version = %s\n", version);
        free(version);
 
        read_or_die(buf, 1);
index 420294a5773e82ee8189e29862f53600a94bb8b9..d35ebf1e29ff47e1c8a1cbb780f402709fa987d8 100644 (file)
@@ -234,6 +234,11 @@ extern int header_page_data_offset;
 extern int header_page_data_size;
 
 int parse_header_page(char *buf, unsigned long size);
+int trace_parse_common_type(void *data);
+struct event *trace_find_event(int id);
+unsigned long long
+raw_field_value(struct event *event, const char *name, void *data);
+void *raw_field_ptr(struct event *event, const char *name, void *data);
 
 void read_tracing_data(struct perf_counter_attr *pattrs, int nb_counters);