#define RCU_TREE_NONCORE
#include "rcutree.h"
+DECLARE_PER_CPU(unsigned int, rcu_cpu_kthread_status);
+DECLARE_PER_CPU(char, rcu_cpu_has_work);
+
+static char convert_kthread_status(unsigned int kthread_status)
+{
+ if (kthread_status > RCU_KTHREAD_MAX)
+ return '?';
+ return "SRWY"[kthread_status];
+}
+
static void print_one_rcu_data(struct seq_file *m, struct rcu_data *rdp)
{
if (!rdp->beenonline)
rdp->passed_quiesc, rdp->passed_quiesc_completed,
rdp->qs_pending);
#ifdef CONFIG_NO_HZ
- seq_printf(m, " dt=%d/%d dn=%d df=%lu",
- rdp->dynticks->dynticks,
+ seq_printf(m, " dt=%d/%d/%d df=%lu",
+ atomic_read(&rdp->dynticks->dynticks),
rdp->dynticks->dynticks_nesting,
- rdp->dynticks->dynticks_nmi,
+ rdp->dynticks->dynticks_nmi_nesting,
rdp->dynticks_fqs);
#endif /* #ifdef CONFIG_NO_HZ */
seq_printf(m, " of=%lu ri=%lu", rdp->offline_fqs, rdp->resched_ipi);
- seq_printf(m, " ql=%ld b=%ld\n", rdp->qlen, rdp->blimit);
+ seq_printf(m, " ql=%ld qs=%c%c%c%c kt=%d/%c b=%ld",
+ rdp->qlen,
+ ".N"[rdp->nxttail[RCU_NEXT_READY_TAIL] !=
+ rdp->nxttail[RCU_NEXT_TAIL]],
+ ".R"[rdp->nxttail[RCU_WAIT_TAIL] !=
+ rdp->nxttail[RCU_NEXT_READY_TAIL]],
+ ".W"[rdp->nxttail[RCU_DONE_TAIL] !=
+ rdp->nxttail[RCU_WAIT_TAIL]],
+ ".D"[&rdp->nxtlist != rdp->nxttail[RCU_DONE_TAIL]],
+ per_cpu(rcu_cpu_has_work, rdp->cpu),
+ convert_kthread_status(per_cpu(rcu_cpu_kthread_status,
+ rdp->cpu)),
+ rdp->blimit);
+ seq_printf(m, " ci=%lu co=%lu ca=%lu\n",
+ rdp->n_cbs_invoked, rdp->n_cbs_orphaned, rdp->n_cbs_adopted);
}
#define PRINT_RCU_DATA(name, func, m) \
rdp->qs_pending);
#ifdef CONFIG_NO_HZ
seq_printf(m, ",%d,%d,%d,%lu",
- rdp->dynticks->dynticks,
+ atomic_read(&rdp->dynticks->dynticks),
rdp->dynticks->dynticks_nesting,
- rdp->dynticks->dynticks_nmi,
+ rdp->dynticks->dynticks_nmi_nesting,
rdp->dynticks_fqs);
#endif /* #ifdef CONFIG_NO_HZ */
seq_printf(m, ",%lu,%lu", rdp->offline_fqs, rdp->resched_ipi);
- seq_printf(m, ",%ld,%ld\n", rdp->qlen, rdp->blimit);
+ seq_printf(m, ",%ld,\"%c%c%c%c\",%d,\"%c\",%ld", rdp->qlen,
+ ".N"[rdp->nxttail[RCU_NEXT_READY_TAIL] !=
+ rdp->nxttail[RCU_NEXT_TAIL]],
+ ".R"[rdp->nxttail[RCU_WAIT_TAIL] !=
+ rdp->nxttail[RCU_NEXT_READY_TAIL]],
+ ".W"[rdp->nxttail[RCU_DONE_TAIL] !=
+ rdp->nxttail[RCU_WAIT_TAIL]],
+ ".D"[&rdp->nxtlist != rdp->nxttail[RCU_DONE_TAIL]],
+ per_cpu(rcu_cpu_has_work, rdp->cpu),
+ convert_kthread_status(per_cpu(rcu_cpu_kthread_status,
+ rdp->cpu)),
+ rdp->blimit);
+ seq_printf(m, ",%lu,%lu,%lu\n",
+ rdp->n_cbs_invoked, rdp->n_cbs_orphaned, rdp->n_cbs_adopted);
}
static int show_rcudata_csv(struct seq_file *m, void *unused)
{
seq_puts(m, "\"CPU\",\"Online?\",\"c\",\"g\",\"pq\",\"pqc\",\"pq\",");
#ifdef CONFIG_NO_HZ
- seq_puts(m, "\"dt\",\"dt nesting\",\"dn\",\"df\",");
+ seq_puts(m, "\"dt\",\"dt nesting\",\"dt NMI nesting\",\"df\",");
#endif /* #ifdef CONFIG_NO_HZ */
- seq_puts(m, "\"of\",\"ri\",\"ql\",\"b\"\n");
+ seq_puts(m, "\"of\",\"ri\",\"ql\",\"b\",\"ci\",\"co\",\"ca\"\n");
#ifdef CONFIG_TREE_PREEMPT_RCU
seq_puts(m, "\"rcu_preempt:\"\n");
PRINT_RCU_DATA(rcu_preempt_data, print_one_rcu_data_csv, m);
.release = single_release,
};
+#ifdef CONFIG_RCU_BOOST
+
+static void print_one_rcu_node_boost(struct seq_file *m, struct rcu_node *rnp)
+{
+ seq_printf(m, "%d:%d tasks=%c%c%c%c kt=%c ntb=%lu neb=%lu nnb=%lu "
+ "j=%04x bt=%04x\n",
+ rnp->grplo, rnp->grphi,
+ "T."[list_empty(&rnp->blkd_tasks)],
+ "N."[!rnp->gp_tasks],
+ "E."[!rnp->exp_tasks],
+ "B."[!rnp->boost_tasks],
+ convert_kthread_status(rnp->boost_kthread_status),
+ rnp->n_tasks_boosted, rnp->n_exp_boosts,
+ rnp->n_normal_boosts,
+ (int)(jiffies & 0xffff),
+ (int)(rnp->boost_time & 0xffff));
+ seq_printf(m, "%s: nt=%lu egt=%lu bt=%lu nb=%lu ny=%lu nos=%lu\n",
+ " balk",
+ rnp->n_balk_blkd_tasks,
+ rnp->n_balk_exp_gp_tasks,
+ rnp->n_balk_boost_tasks,
+ rnp->n_balk_notblocked,
+ rnp->n_balk_notyet,
+ rnp->n_balk_nos);
+}
+
+static int show_rcu_node_boost(struct seq_file *m, void *unused)
+{
+ struct rcu_node *rnp;
+
+ rcu_for_each_leaf_node(&rcu_preempt_state, rnp)
+ print_one_rcu_node_boost(m, rnp);
+ return 0;
+}
+
+static int rcu_node_boost_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, show_rcu_node_boost, NULL);
+}
+
+static const struct file_operations rcu_node_boost_fops = {
+ .owner = THIS_MODULE,
+ .open = rcu_node_boost_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+/*
+ * Create the rcuboost debugfs entry. Standard error return.
+ */
+static int rcu_boost_trace_create_file(struct dentry *rcudir)
+{
+ return !debugfs_create_file("rcuboost", 0444, rcudir, NULL,
+ &rcu_node_boost_fops);
+}
+
+#else /* #ifdef CONFIG_RCU_BOOST */
+
+static int rcu_boost_trace_create_file(struct dentry *rcudir)
+{
+ return 0; /* There cannot be an error if we didn't create it! */
+}
+
+#endif /* #else #ifdef CONFIG_RCU_BOOST */
+
static void print_one_rcu_state(struct seq_file *m, struct rcu_state *rsp)
{
unsigned long gpnum;
int level = 0;
- int phase;
struct rcu_node *rnp;
gpnum = rsp->gpnum;
seq_printf(m, "c=%lu g=%lu s=%d jfq=%ld j=%x "
- "nfqs=%lu/nfqsng=%lu(%lu) fqlh=%lu oqlen=%ld\n",
+ "nfqs=%lu/nfqsng=%lu(%lu) fqlh=%lu\n",
rsp->completed, gpnum, rsp->signaled,
(long)(rsp->jiffies_force_qs - jiffies),
(int)(jiffies & 0xffff),
rsp->n_force_qs, rsp->n_force_qs_ngp,
rsp->n_force_qs - rsp->n_force_qs_ngp,
- rsp->n_force_qs_lh, rsp->orphan_qlen);
+ rsp->n_force_qs_lh);
for (rnp = &rsp->node[0]; rnp - &rsp->node[0] < NUM_RCU_NODES; rnp++) {
if (rnp->level != level) {
seq_puts(m, "\n");
level = rnp->level;
}
- phase = gpnum & 0x1;
- seq_printf(m, "%lx/%lx %c%c>%c%c %d:%d ^%d ",
+ seq_printf(m, "%lx/%lx %c%c>%c %d:%d ^%d ",
rnp->qsmask, rnp->qsmaskinit,
- "T."[list_empty(&rnp->blocked_tasks[phase])],
- "E."[list_empty(&rnp->blocked_tasks[phase + 2])],
- "T."[list_empty(&rnp->blocked_tasks[!phase])],
- "E."[list_empty(&rnp->blocked_tasks[!phase + 2])],
+ ".G"[rnp->gp_tasks != NULL],
+ ".E"[rnp->exp_tasks != NULL],
+ ".T"[!list_empty(&rnp->blkd_tasks)],
rnp->grplo, rnp->grphi, rnp->grpnum);
}
seq_puts(m, "\n");
struct rcu_data *rdp;
for_each_possible_cpu(cpu) {
- rdp = rsp->rda[cpu];
+ rdp = per_cpu_ptr(rsp->rda, cpu);
if (rdp->beenonline)
print_one_rcu_pending(m, rdp);
}
static struct dentry *rcudir;
-static int __init rcuclassic_trace_init(void)
+static int __init rcutree_trace_init(void)
{
struct dentry *retval;
if (!retval)
goto free_out;
+ if (rcu_boost_trace_create_file(rcudir))
+ goto free_out;
+
retval = debugfs_create_file("rcugp", 0444, rcudir, NULL, &rcugp_fops);
if (!retval)
goto free_out;
return 1;
}
-static void __exit rcuclassic_trace_cleanup(void)
+static void __exit rcutree_trace_cleanup(void)
{
debugfs_remove_recursive(rcudir);
}
-module_init(rcuclassic_trace_init);
-module_exit(rcuclassic_trace_cleanup);
+module_init(rcutree_trace_init);
+module_exit(rcutree_trace_cleanup);
MODULE_AUTHOR("Paul E. McKenney");
MODULE_DESCRIPTION("Read-Copy Update tracing for hierarchical implementation");
Code Review / linux-2.6.git / blobdiff