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perf tools: Add support for PERF_RECORD_ITRACE_START

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Add support for the PERF_RECORD_ITRACE_START event type.  This event can
be used to determine the pid and tid that are running when Instruction
Tracing starts.  Generally that information would come from a
sched_switch event but, at the start, no sched_switch events may yet
have been recorded.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1430404667-10593-8-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2015-04-30 17:37:30 +03:00 committed by Arnaldo Carvalho de Melo
parent 4a96f7a02e
commit 0ad21f6869
7 changed files with 59 additions and 0 deletions
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1
tools/perf/builtin-inject.c
View File

@ -559,6 +559,7 @@ int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused)
.exit = perf_event__repipe,
.lost = perf_event__repipe,
.aux = perf_event__repipe,
.itrace_start = perf_event__repipe,
.read = perf_event__repipe_sample,
.throttle = perf_event__repipe,
.unthrottle = perf_event__repipe,

18
tools/perf/util/event.c
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@ -24,6 +24,7 @@ static const char *perf_event__names[] = {
[PERF_RECORD_READ] = "READ",
[PERF_RECORD_SAMPLE] = "SAMPLE",
[PERF_RECORD_AUX] = "AUX",
[PERF_RECORD_ITRACE_START] = "ITRACE_START",
[PERF_RECORD_HEADER_ATTR] = "ATTR",
[PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
[PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
@ -704,6 +705,14 @@ int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
return machine__process_aux_event(machine, event);
}
int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct perf_sample *sample __maybe_unused,
struct machine *machine)
{
return machine__process_itrace_start_event(machine, event);
}
size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
{
return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
@ -776,6 +785,12 @@ size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "");
}
size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
{
return fprintf(fp, " pid: %u tid: %u\n",
event->itrace_start.pid, event->itrace_start.tid);
}
size_t perf_event__fprintf(union perf_event *event, FILE *fp)
{
size_t ret = fprintf(fp, "PERF_RECORD_%s",
@ -798,6 +813,9 @@ size_t perf_event__fprintf(union perf_event *event, FILE *fp)
case PERF_RECORD_AUX:
ret += perf_event__fprintf_aux(event, fp);
break;
case PERF_RECORD_ITRACE_START:
ret += perf_event__fprintf_itrace_start(event, fp);
break;
default:
ret += fprintf(fp, "\n");
}

11
tools/perf/util/event.h
View File

@ -330,6 +330,11 @@ struct aux_event {
u64 flags;
};
struct itrace_start_event {
struct perf_event_header header;
u32 pid, tid;
};
union perf_event {
struct perf_event_header header;
struct mmap_event mmap;
@ -349,6 +354,7 @@ union perf_event {
struct auxtrace_event auxtrace;
struct auxtrace_error_event auxtrace_error;
struct aux_event aux;
struct itrace_start_event itrace_start;
};
void perf_event__print_totals(void);
@ -388,6 +394,10 @@ int perf_event__process_aux(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine);
int perf_event__process_itrace_start(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine);
int perf_event__process_mmap(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
@ -446,6 +456,7 @@ size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp);
size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp);
size_t perf_event__fprintf_task(union perf_event *event, FILE *fp);
size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp);
size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp);
size_t perf_event__fprintf(union perf_event *event, FILE *fp);
u64 kallsyms__get_function_start(const char *kallsyms_filename,

11
tools/perf/util/machine.c
View File

@ -494,6 +494,14 @@ int machine__process_aux_event(struct machine *machine __maybe_unused,
return 0;
}
int machine__process_itrace_start_event(struct machine *machine __maybe_unused,
union perf_event *event)
{
if (dump_trace)
perf_event__fprintf_itrace_start(event, stdout);
return 0;
}
struct map *machine__new_module(struct machine *machine, u64 start,
const char *filename)
{
@ -1341,6 +1349,9 @@ int machine__process_event(struct machine *machine, union perf_event *event,
ret = machine__process_lost_event(machine, event, sample); break;
case PERF_RECORD_AUX:
ret = machine__process_aux_event(machine, event); break;
case PERF_RECORD_ITRACE_START:
ret = machine__process_itrace_start_event(machine, event);
break;
default:
ret = -1;
break;

2
tools/perf/util/machine.h
View File

@ -83,6 +83,8 @@ int machine__process_lost_event(struct machine *machine, union perf_event *event
struct perf_sample *sample);
int machine__process_aux_event(struct machine *machine,
union perf_event *event);
int machine__process_itrace_start_event(struct machine *machine,
union perf_event *event);
int machine__process_mmap_event(struct machine *machine, union perf_event *event,
struct perf_sample *sample);
int machine__process_mmap2_event(struct machine *machine, union perf_event *event,

15
tools/perf/util/session.c
View File

@ -327,6 +327,8 @@ void perf_tool__fill_defaults(struct perf_tool *tool)
tool->lost = perf_event__process_lost;
if (tool->aux == NULL)
tool->aux = perf_event__process_aux;
if (tool->itrace_start == NULL)
tool->itrace_start = perf_event__process_itrace_start;
if (tool->read == NULL)
tool->read = process_event_sample_stub;
if (tool->throttle == NULL)
@ -455,6 +457,16 @@ static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
swap_sample_id_all(event, &event->aux + 1);
}
static void perf_event__itrace_start_swap(union perf_event *event,
bool sample_id_all)
{
event->itrace_start.pid = bswap_32(event->itrace_start.pid);
event->itrace_start.tid = bswap_32(event->itrace_start.tid);
if (sample_id_all)
swap_sample_id_all(event, &event->itrace_start + 1);
}
static void perf_event__throttle_swap(union perf_event *event,
bool sample_id_all)
{
@ -593,6 +605,7 @@ static perf_event__swap_op perf_event__swap_ops[] = {
[PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap,
[PERF_RECORD_SAMPLE] = perf_event__all64_swap,
[PERF_RECORD_AUX] = perf_event__aux_swap,
[PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap,
[PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
[PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
[PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
@ -1044,6 +1057,8 @@ static int machines__deliver_event(struct machines *machines,
return tool->unthrottle(tool, event, sample, machine);
case PERF_RECORD_AUX:
return tool->aux(tool, event, sample, machine);
case PERF_RECORD_ITRACE_START:
return tool->itrace_start(tool, event, sample, machine);
default:
++evlist->stats.nr_unknown_events;
return -1;

1
tools/perf/util/tool.h
View File

@ -44,6 +44,7 @@ struct perf_tool {
exit,
lost,
aux,
itrace_start,
throttle,
unthrottle;
event_attr_op attr;