Re: [PATCH 1/1] perf arm-spe: Inject SPE samples in perf-inject

From: Arnaldo Carvalho de Melo
Date: Wed Nov 17 2021 - 10:27:53 EST


Em Mon, Nov 08, 2021 at 08:39:58PM +0000, James Clark escreveu:
>
>
> On 05/11/2021 10:41, German Gomez wrote:
> > Inject synthesized SPE samples during perf-inject run.
> >
> > Signed-off-by: German Gomez <german.gomez@xxxxxxx>
>
> Reviewed-by: James Clark <james.clark@xxxxxxx>


Thanks, applied.

- Arnaldo


> > ---
> > tools/perf/util/arm-spe.c | 15 +++++++++++++++
> > 1 file changed, 15 insertions(+)
> >
> > diff --git a/tools/perf/util/arm-spe.c b/tools/perf/util/arm-spe.c
> > index 58b7069c5..7054f2315 100644
> > --- a/tools/perf/util/arm-spe.c
> > +++ b/tools/perf/util/arm-spe.c
> > @@ -51,6 +51,7 @@ struct arm_spe {
> > u8 timeless_decoding;
> > u8 data_queued;
> >
> > + u64 sample_type;
> > u8 sample_flc;
> > u8 sample_llc;
> > u8 sample_tlb;
> > @@ -248,6 +249,12 @@ static void arm_spe_prep_sample(struct arm_spe *spe,
> > event->sample.header.size = sizeof(struct perf_event_header);
> > }
> >
> > +static int arm_spe__inject_event(union perf_event *event, struct perf_sample *sample, u64 type)
> > +{
> > + event->header.size = perf_event__sample_event_size(sample, type, 0);
> > + return perf_event__synthesize_sample(event, type, 0, sample);
> > +}
> > +
> > static inline int
> > arm_spe_deliver_synth_event(struct arm_spe *spe,
> > struct arm_spe_queue *speq __maybe_unused,
> > @@ -256,6 +263,12 @@ arm_spe_deliver_synth_event(struct arm_spe *spe,
> > {
> > int ret;
> >
> > + if (spe->synth_opts.inject) {
> > + ret = arm_spe__inject_event(event, sample, spe->sample_type);
> > + if (ret)
> > + return ret;
> > + }
> > +
> > ret = perf_session__deliver_synth_event(spe->session, event, sample);
> > if (ret)
> > pr_err("ARM SPE: failed to deliver event, error %d\n", ret);
> > @@ -920,6 +933,8 @@ arm_spe_synth_events(struct arm_spe *spe, struct perf_session *session)
> > else
> > attr.sample_type |= PERF_SAMPLE_TIME;
> >
> > + spe->sample_type = attr.sample_type;
> > +
> > attr.exclude_user = evsel->core.attr.exclude_user;
> > attr.exclude_kernel = evsel->core.attr.exclude_kernel;
> > attr.exclude_hv = evsel->core.attr.exclude_hv;
> >

--

- Arnaldo