[PATCH V2 15/23] perf intel-pt: Use evlist__add_dummy_on_all_cpus() for switch tracking

Adrian Hunter
2022-05-06T12:27:35Z

Use evlist__add_dummy_on_all_cpus() for switch tracking in preparation for
allowing system-wide events on all CPUs while the user requested events are
on only user requested CPUs.

Acked-by: Ian Rogers <irogers@google.com>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
tools/perf/arch/x86/util/intel-pt.c | 13 +++----------
1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/tools/perf/arch/x86/util/intel-pt.c b/tools/perf/arch/x86/util/intel-pt.c
index 2eaac4638aab..0ee93894a0da 100644
--- a/tools/perf/arch/x86/util/intel-pt.c
+++ b/tools/perf/arch/x86/util/intel-pt.c
@@ -811,18 +811,11 @@ static int intel_pt_recording_options(struct auxtrace_record *itr,
if (!cpu_wide && perf_can_record_cpu_wide()) {
struct evsel *switch_evsel;

- err = parse_events(evlist, "dummy:u", NULL);
- if (err)
- return err;
+ switch_evsel = evlist__add_dummy_on_all_cpus(evlist);
+ if (!switch_evsel)
+ return -ENOMEM;

- switch_evsel = evlist__last(evlist);
-
- switch_evsel->core.attr.freq = 0;
- switch_evsel->core.attr.sample_period = 1;
switch_evsel->core.attr.context_switch = 1;
-
- switch_evsel->core.system_wide = true;
- switch_evsel->no_aux_samples = true;
switch_evsel->immediate = true;

evsel__set_sample_bit(switch_evsel, TID);
--
2.25.1