perf tools: Remove unused trace_read_data function
[linux-3.10.git] / tools / perf / util / trace-event-read.c
index 3741572..7cb2463 100644 (file)
@@ -41,8 +41,6 @@
 
 static int input_fd;
 
-static int read_page;
-
 int file_bigendian;
 int host_bigendian;
 static int long_size;
@@ -287,205 +285,6 @@ static void read_event_files(struct pevent *pevent)
        }
 }
 
-struct cpu_data {
-       unsigned long long      offset;
-       unsigned long long      size;
-       unsigned long long      timestamp;
-       struct pevent_record    *next;
-       char                    *page;
-       int                     cpu;
-       int                     index;
-       int                     page_size;
-};
-
-static struct cpu_data *cpu_data;
-
-static void update_cpu_data_index(int cpu)
-{
-       cpu_data[cpu].offset += page_size;
-       cpu_data[cpu].size -= page_size;
-       cpu_data[cpu].index = 0;
-}
-
-static void get_next_page(int cpu)
-{
-       off_t save_seek;
-       off_t ret;
-
-       if (!cpu_data[cpu].page)
-               return;
-
-       if (read_page) {
-               if (cpu_data[cpu].size <= page_size) {
-                       free(cpu_data[cpu].page);
-                       cpu_data[cpu].page = NULL;
-                       return;
-               }
-
-               update_cpu_data_index(cpu);
-
-               /* other parts of the code may expect the pointer to not move */
-               save_seek = lseek(input_fd, 0, SEEK_CUR);
-
-               ret = lseek(input_fd, cpu_data[cpu].offset, SEEK_SET);
-               if (ret == (off_t)-1)
-                       die("failed to lseek");
-               ret = read(input_fd, cpu_data[cpu].page, page_size);
-               if (ret < 0)
-                       die("failed to read page");
-
-               /* reset the file pointer back */
-               lseek(input_fd, save_seek, SEEK_SET);
-
-               return;
-       }
-
-       munmap(cpu_data[cpu].page, page_size);
-       cpu_data[cpu].page = NULL;
-
-       if (cpu_data[cpu].size <= page_size)
-               return;
-
-       update_cpu_data_index(cpu);
-
-       cpu_data[cpu].page = mmap(NULL, page_size, PROT_READ, MAP_PRIVATE,
-                                 input_fd, cpu_data[cpu].offset);
-       if (cpu_data[cpu].page == MAP_FAILED)
-               die("failed to mmap cpu %d at offset 0x%llx",
-                   cpu, cpu_data[cpu].offset);
-}
-
-static unsigned int type_len4host(unsigned int type_len_ts)
-{
-       if (file_bigendian)
-               return (type_len_ts >> 27) & ((1 << 5) - 1);
-       else
-               return type_len_ts & ((1 << 5) - 1);
-}
-
-static unsigned int ts4host(unsigned int type_len_ts)
-{
-       if (file_bigendian)
-               return type_len_ts & ((1 << 27) - 1);
-       else
-               return type_len_ts >> 5;
-}
-
-static int calc_index(void *ptr, int cpu)
-{
-       return (unsigned long)ptr - (unsigned long)cpu_data[cpu].page;
-}
-
-struct pevent_record *trace_peek_data(struct pevent *pevent, int cpu)
-{
-       struct pevent_record *data;
-       void *page = cpu_data[cpu].page;
-       int idx = cpu_data[cpu].index;
-       void *ptr = page + idx;
-       unsigned long long extend;
-       unsigned int type_len_ts;
-       unsigned int type_len;
-       unsigned int delta;
-       unsigned int length = 0;
-
-       if (cpu_data[cpu].next)
-               return cpu_data[cpu].next;
-
-       if (!page)
-               return NULL;
-
-       if (!idx) {
-               /* FIXME: handle header page */
-               if (header_page_ts_size != 8)
-                       die("expected a long long type for timestamp");
-               cpu_data[cpu].timestamp = data2host8(pevent, ptr);
-               ptr += 8;
-               switch (header_page_size_size) {
-               case 4:
-                       cpu_data[cpu].page_size = data2host4(pevent, ptr);
-                       ptr += 4;
-                       break;
-               case 8:
-                       cpu_data[cpu].page_size = data2host8(pevent, ptr);
-                       ptr += 8;
-                       break;
-               default:
-                       die("bad long size");
-               }
-               ptr = cpu_data[cpu].page + header_page_data_offset;
-       }
-
-read_again:
-       idx = calc_index(ptr, cpu);
-
-       if (idx >= cpu_data[cpu].page_size) {
-               get_next_page(cpu);
-               return trace_peek_data(pevent, cpu);
-       }
-
-       type_len_ts = data2host4(pevent, ptr);
-       ptr += 4;
-
-       type_len = type_len4host(type_len_ts);
-       delta = ts4host(type_len_ts);
-
-       switch (type_len) {
-       case RINGBUF_TYPE_PADDING:
-               if (!delta)
-                       die("error, hit unexpected end of page");
-               length = data2host4(pevent, ptr);
-               ptr += 4;
-               length *= 4;
-               ptr += length;
-               goto read_again;
-
-       case RINGBUF_TYPE_TIME_EXTEND:
-               extend = data2host4(pevent, ptr);
-               ptr += 4;
-               extend <<= TS_SHIFT;
-               extend += delta;
-               cpu_data[cpu].timestamp += extend;
-               goto read_again;
-
-       case RINGBUF_TYPE_TIME_STAMP:
-               ptr += 12;
-               break;
-       case 0:
-               length = data2host4(pevent, ptr);
-               ptr += 4;
-               die("here! length=%d", length);
-               break;
-       default:
-               length = type_len * 4;
-               break;
-       }
-
-       cpu_data[cpu].timestamp += delta;
-
-       data = malloc_or_die(sizeof(*data));
-       memset(data, 0, sizeof(*data));
-
-       data->ts = cpu_data[cpu].timestamp;
-       data->size = length;
-       data->data = ptr;
-       ptr += length;
-
-       cpu_data[cpu].index = calc_index(ptr, cpu);
-       cpu_data[cpu].next = data;
-
-       return data;
-}
-
-struct pevent_record *trace_read_data(struct pevent *pevent, int cpu)
-{
-       struct pevent_record *data;
-
-       data = trace_peek_data(pevent, cpu);
-       cpu_data[cpu].next = NULL;
-
-       return data;
-}
-
 ssize_t trace_report(int fd, struct pevent **ppevent, bool __repipe)
 {
        char buf[BUFSIZ];