leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

perf intel-pt: Process options for PEBS event synthesis

Browse Source 
Process synth_opts.other_events and attr.aux_output to set up for
synthesizing PEBs via Intel PT events.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190806084606.4021-6-alexander.shishkin@linux.intel.com
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
[ Fixed up libbperf clashes, i.e. some places using perf_evsel (now in libperf)
  need to use instead 'evsel' (a tools/perf only abstraction) ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2019-08-06 11:46:04 +03:00 committed by Arnaldo Carvalho de Melo
parent 181ebb5e23
commit 9e64cefe43
2 changed files with 41 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
tools/perf/arch/x86/util/intel-pt.c
View File

@ -548,6 +548,26 @@ static int intel_pt_validate_config(struct perf_pmu *intel_pt_pmu,
evsel->core.attr.config);
}
/*
* Currently, there is not enough information to disambiguate different PEBS
* events, so only allow one.
*/
static bool intel_pt_too_many_aux_output(struct evlist *evlist)
{
struct evsel *evsel;
int aux_output_cnt = 0;
evlist__for_each_entry(evlist, evsel)
aux_output_cnt += !!evsel->core.attr.aux_output;
if (aux_output_cnt > 1) {
pr_err(INTEL_PT_PMU_NAME " supports at most one event with aux-output\n");
return true;
}
return false;
}
static int intel_pt_recording_options(struct auxtrace_record *itr,
struct evlist *evlist,
struct record_opts *opts)
@ -588,6 +608,9 @@ static int intel_pt_recording_options(struct auxtrace_record *itr,
return -EINVAL;
}
if (intel_pt_too_many_aux_output(evlist))
return -EINVAL;
if (!opts->full_auxtrace)
return 0;

18
tools/perf/util/intel-pt.c
View File

@ -2894,6 +2894,22 @@ static int intel_pt_synth_events(struct intel_pt *pt,
return 0;
}
static void intel_pt_setup_pebs_events(struct intel_pt *pt)
{
struct evsel *evsel;
if (!pt->synth_opts.other_events)
return;
evlist__for_each_entry(pt->session->evlist, evsel) {
if (evsel->core.attr.aux_output && evsel->id) {
pt->sample_pebs = true;
pt->pebs_evsel = evsel;
return;
}
}
}
static struct evsel *intel_pt_find_sched_switch(struct evlist *evlist)
{
struct evsel *evsel;
@ -3263,6 +3279,8 @@ int intel_pt_process_auxtrace_info(union perf_event *event,
if (err)
goto err_delete_thread;
intel_pt_setup_pebs_events(pt);
err = auxtrace_queues__process_index(&pt->queues, session);
if (err)
goto err_delete_thread;