Re: [PATCH RFC 02/21] libperf evsel: Add perf_evsel__enable_thread()

Namhyung Kim
2022-04-28T23:50:25Z

On Wed, Apr 27, 2022 at 9:15 PM Adrian Hunter <adrian.hunter@intel.com> wrote:
>
> On 28/04/22 00:48, Namhyung Kim wrote:
> > Hi Adrian,
> >
> > On Fri, Apr 22, 2022 at 9:24 AM Adrian Hunter <adrian.hunter@intel.com> wrote:
> >>
> >> Add perf_evsel__enable_thread() as a counterpart to
> >> perf_evsel__enable_cpu(), to enable all events for a thread.
> >>
> >> Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
> >> ---
> >> tools/lib/perf/evsel.c | 10 ++++++++++
> >> tools/lib/perf/include/perf/evsel.h | 1 +
> >> 2 files changed, 11 insertions(+)
> >>
> >> diff --git a/tools/lib/perf/evsel.c b/tools/lib/perf/evsel.c
> >> index 20ae9f5f8b30..2a1f07f877be 100644
> >> --- a/tools/lib/perf/evsel.c
> >> +++ b/tools/lib/perf/evsel.c
> >> @@ -360,6 +360,16 @@ int perf_evsel__enable_cpu(struct perf_evsel *evsel, int cpu_map_idx)
> >> return perf_evsel__run_ioctl(evsel, PERF_EVENT_IOC_ENABLE, NULL, cpu_map_idx);
> >> }
> >>
> >> +int perf_evsel__enable_thread(struct perf_evsel *evsel, int thread)
> >> +{
> >> + int err = 0;
> >> + int i;
> >> +
> >> + for (i = 0; i < xyarray__max_x(evsel->fd) && !err; i++)
> >> + err = perf_evsel__ioctl(evsel, PERF_EVENT_IOC_ENABLE, NULL, i, thread);
> >
> > You might want to break the loop when it fails.
>
> Thanks for looking at this. It should break because of " && !err".

Oh, I missed that part, sorry!

Thanks,
Namhyung