Commit bab81b62 authored by Li Zefan's avatar Li Zefan Committed by Ingo Molnar

perf annotate: Fix perf data parsing

perf-annotate doesn't parse perf.data correctly in that it
doesn't read perf header. Fix this by using
mmap_dispatch_perf_file().

Before:

TOTAL events:      17565
      MMAP events:       3221
      LOST events:         10
      COMM events:        235
      EXIT events:          2
  THROTTLE events:          1
UNTHROTTLE events:          2
      FORK events:         10
      READ events:          1
    SAMPLE events:      14083

After:

TOTAL events:      17290
      MMAP events:       3203
      LOST events:          0
      COMM events:        234
      EXIT events:          1
  THROTTLE events:          0
UNTHROTTLE events:          0
      FORK events:          0
      READ events:          0
    SAMPLE events:      13852
Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arjan van de Ven <arjan@infradead.org>
LKML-Reference: <4B14B201.9030708@cn.fujitsu.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 1ed091c4
......@@ -25,19 +25,16 @@
#include "util/thread.h"
#include "util/sort.h"
#include "util/hist.h"
#include "util/data_map.h"
static char const *input_name = "perf.data";
static int force;
static int input;
static int full_paths;
static int print_line;
static unsigned long page_size;
static unsigned long mmap_window = 32;
struct sym_hist {
u64 sum;
u64 ip[0];
......@@ -156,35 +153,6 @@ static int process_sample_event(event_t *event)
return 0;
}
static int event__process(event_t *self)
{
switch (self->header.type) {
case PERF_RECORD_SAMPLE:
return process_sample_event(self);
case PERF_RECORD_MMAP:
return event__process_mmap(self);
case PERF_RECORD_COMM:
return event__process_comm(self);
case PERF_RECORD_FORK:
return event__process_task(self);
/*
* We dont process them right now but they are fine:
*/
case PERF_RECORD_THROTTLE:
case PERF_RECORD_UNTHROTTLE:
return 0;
default:
return -1;
}
return 0;
}
static int parse_line(FILE *file, struct hist_entry *he, u64 len)
{
struct symbol *sym = he->sym;
......@@ -485,99 +453,26 @@ static void find_annotations(void)
}
}
static struct perf_file_handler file_handler = {
.process_sample_event = process_sample_event,
.process_mmap_event = event__process_mmap,
.process_comm_event = event__process_comm,
.process_fork_event = event__process_task,
};
static int __cmd_annotate(void)
{
int ret, rc = EXIT_FAILURE;
unsigned long offset = 0;
unsigned long head = 0;
struct stat input_stat;
event_t *event;
uint32_t size;
char *buf;
register_idle_thread();
input = open(input_name, O_RDONLY);
if (input < 0) {
perror("failed to open file");
exit(-1);
}
ret = fstat(input, &input_stat);
if (ret < 0) {
perror("failed to stat file");
exit(-1);
}
if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
fprintf(stderr, "file: %s not owned by current user or root\n", input_name);
exit(-1);
}
if (!input_stat.st_size) {
fprintf(stderr, "zero-sized file, nothing to do!\n");
exit(0);
}
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 munmap_ret;
munmap_ret = munmap(buf, page_size * mmap_window);
assert(munmap_ret == 0);
offset += shift;
head -= shift;
goto remap;
}
size = event->header.size;
dump_printf("%p [%p]: event: %d\n",
(void *)(offset + head),
(void *)(long)event->header.size,
event->header.type);
if (!size || event__process(event) < 0) {
dump_printf("%p [%p]: skipping unknown header type: %d\n",
(void *)(offset + head),
(void *)(long)(event->header.size),
event->header.type);
/*
* 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)input_stat.st_size)
goto more;
struct perf_header *header;
struct thread *idle;
int ret;
rc = EXIT_SUCCESS;
close(input);
idle = register_idle_thread();
register_perf_file_handler(&file_handler);
ret = mmap_dispatch_perf_file(&header, input_name, 0, 0,
&event__cwdlen, &event__cwd);
if (ret)
return ret;
if (dump_trace) {
event__print_totals();
......@@ -595,7 +490,7 @@ static int __cmd_annotate(void)
find_annotations();
return rc;
return ret;
}
static const char * const annotate_usage[] = {
......@@ -644,8 +539,6 @@ int cmd_annotate(int argc, const char **argv, const char *prefix __used)
if (symbol__init(&symbol_conf) < 0)
return -1;
page_size = getpagesize();
argc = parse_options(argc, argv, options, annotate_usage, 0);
setup_sorting();
......
......@@ -186,8 +186,7 @@ int event__process_comm(event_t *self)
{
struct thread *thread = threads__findnew(self->comm.pid);
dump_printf("PERF_RECORD_COMM: %s:%d\n",
self->comm.comm, self->comm.pid);
dump_printf(": %s:%d\n", self->comm.comm, self->comm.pid);
if (thread == NULL || thread__set_comm(thread, self->comm.comm)) {
dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
......
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