perf report: add more debugging
Add the offset of the file we are analyzing, and the size of the record.
In case of problems it's easier to see where the parser lost track.
Cc: Peter Zijlstra <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Corey Ashford <[email protected]>
Cc: Marcelo Tosatti <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: John Kacur <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
diff --git a/Documentation/perf_counter/builtin-report.c b/Documentation/perf_counter/builtin-report.c
index 4b5ccc5b..2d4e4cc 100644
--- a/Documentation/perf_counter/builtin-report.c
+++ b/Documentation/perf_counter/builtin-report.c
@@ -645,7 +645,7 @@
char *buf;
event_t *event;
int ret, rc = EXIT_FAILURE;
- unsigned long total = 0, total_mmap = 0, total_comm = 0, total_unknown;
+ unsigned long total = 0, total_mmap = 0, total_comm = 0, total_unknown = 0;
input = open(input_name, O_RDONLY);
if (input < 0) {
@@ -699,8 +699,6 @@
goto done;
}
- head += event->header.size;
-
if (event->header.misc & PERF_EVENT_MISC_OVERFLOW) {
char level;
int show = 0;
@@ -709,7 +707,9 @@
uint64_t ip = event->ip.ip;
if (dump_trace) {
- fprintf(stderr, "PERF_EVENT (IP, %d): %d: %p\n",
+ fprintf(stderr, "%p [%p]: PERF_EVENT (IP, %d): %d: %p\n",
+ (void *)(offset + head),
+ (void *)(long)(event->header.size),
event->header.misc,
event->ip.pid,
(void *)event->ip.ip);
@@ -753,7 +753,9 @@
struct map *map = map__new(&event->mmap);
if (dump_trace) {
- fprintf(stderr, "PERF_EVENT_MMAP: [%p(%p) @ %p]: %s\n",
+ fprintf(stderr, "%p [%p]: PERF_EVENT_MMAP: [%p(%p) @ %p]: %s\n",
+ (void *)(offset + head),
+ (void *)(long)(event->header.size),
(void *)event->mmap.start,
(void *)event->mmap.len,
(void *)event->mmap.pgoff,
@@ -771,7 +773,9 @@
struct thread *thread = threads__findnew(event->comm.pid);
if (dump_trace) {
- fprintf(stderr, "PERF_EVENT_COMM: %s:%d\n",
+ fprintf(stderr, "%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 ||
@@ -783,12 +787,16 @@
break;
}
default: {
- fprintf(stderr, "skipping unknown header type: %d\n",
+ fprintf(stderr, "%p [%p]: skipping unknown header type: %d\n",
+ (void *)(offset + head),
+ (void *)(long)(event->header.size),
event->header.type);
total_unknown++;
}
}
+ head += event->header.size;
+
if (offset + head < stat.st_size)
goto more;
