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perf evlist: Add perf_evlist__set_tracking_event()

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Add a function to change which event is used to track mmap, comm and
task events.

This is needed with Instruction Tracing because the Instruction Tracing
event must come first but cannot be used for tracking because it will be
disabled under some circumstances.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1406786474-9306-10-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2014-07-31 09:00:52 +03:00 committed by Arnaldo Carvalho de Melo
parent bf8e8f4b83
commit 60b0896cc3
5 changed files with 24 additions and 2 deletions
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17
tools/perf/util/evlist.c
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@ -122,6 +122,7 @@ void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry)
{
list_add_tail(&entry->node, &evlist->entries);
entry->idx = evlist->nr_entries;
entry->tracking = !entry->idx;
if (!evlist->nr_entries++)
perf_evlist__set_id_pos(evlist);
@ -1295,3 +1296,19 @@ void perf_evlist__to_front(struct perf_evlist *evlist,
list_splice(&move, &evlist->entries);
}
void perf_evlist__set_tracking_event(struct perf_evlist *evlist,
struct perf_evsel *tracking_evsel)
{
struct perf_evsel *evsel;
if (tracking_evsel->tracking)
return;
evlist__for_each(evlist, evsel) {
if (evsel != tracking_evsel)
evsel->tracking = false;
}
tracking_evsel->tracking = true;
}

3
tools/perf/util/evlist.h
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@ -262,4 +262,7 @@ void perf_evlist__to_front(struct perf_evlist *evlist,
#define evlist__for_each_safe(evlist, tmp, evsel) \
__evlist__for_each_safe(&(evlist)->entries, tmp, evsel)
void perf_evlist__set_tracking_event(struct perf_evlist *evlist,
struct perf_evsel *tracking_evsel);
#endif /* __PERF_EVLIST_H */

3
tools/perf/util/evsel.c
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@ -162,6 +162,7 @@ void perf_evsel__init(struct perf_evsel *evsel,
struct perf_event_attr *attr, int idx)
{
evsel->idx = idx;
evsel->tracking = !idx;
evsel->attr = *attr;
evsel->leader = evsel;
evsel->unit = "";
@ -561,7 +562,7 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts)
{
struct perf_evsel *leader = evsel->leader;
struct perf_event_attr *attr = &evsel->attr;
int track = !evsel->idx; /* only the first counter needs these */
int track = evsel->tracking;
bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread;
attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;

1
tools/perf/util/evsel.h
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@ -86,6 +86,7 @@ struct perf_evsel {
bool no_aux_samples;
bool immediate;
bool system_wide;
bool tracking;
/* parse modifier helper */
int exclude_GH;
int nr_members;

2
tools/perf/util/record.c
View File

@ -115,7 +115,7 @@ void perf_evlist__config(struct perf_evlist *evlist, struct record_opts *opts)
evlist__for_each(evlist, evsel) {
perf_evsel__config(evsel, opts);
if (!evsel->idx && use_comm_exec)
if (evsel->tracking && use_comm_exec)
evsel->attr.comm_exec = 1;
}