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perf record: Uniquify hybrid event name

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For perf-record, it would be useful to tell user the pmu which the
event belongs to.

For example,

  # perf record -a -- sleep 1
  # perf report

  # To display the perf.data header info, please use --header/--header-only options.
  #
  #
  # Total Lost Samples: 0
  #
  # Samples: 106  of event 'cpu_core/cycles/'
  # Event count (approx.): 22043448
  #
  # Overhead  Command       Shared Object            Symbol
  # ........  ............  .......................  ............................
  #
  ...

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210427070139.25256-18-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jin Yao 2021-04-27 15:01:30 +08:00 committed by Arnaldo Carvalho de Melo
parent 660e533e87
commit 91c0f5ec81
1 changed files with 28 additions and 0 deletions
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28
tools/perf/builtin-record.c
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@ -1605,6 +1605,32 @@ static void hit_auxtrace_snapshot_trigger(struct record *rec)
}
}
static void record__uniquify_name(struct record *rec)
{
struct evsel *pos;
struct evlist *evlist = rec->evlist;
char *new_name;
int ret;
if (!perf_pmu__has_hybrid())
return;
evlist__for_each_entry(evlist, pos) {
if (!evsel__is_hybrid(pos))
continue;
if (strchr(pos->name, '/'))
continue;
ret = asprintf(&new_name, "%s/%s/",
pos->pmu_name, pos->name);
if (ret) {
free(pos->name);
pos->name = new_name;
}
}
}
static int __cmd_record(struct record *rec, int argc, const char **argv)
{
int err;
@ -1709,6 +1735,8 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
if (data->is_pipe && rec->evlist->core.nr_entries == 1)
rec->opts.sample_id = true;
record__uniquify_name(rec);
if (record__open(rec) != 0) {
err = -1;
goto out_child;