From: Peter Zijlstra <peterz@infradead.org>
To: "Liang, Kan" <kan.liang@linux.intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Leo Yan <leo.yan@linaro.org>,
x86@kernel.org, linux-perf-users@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH V3 1/3] perf/x86: Add new event for AUX output counter index
Date: Fri, 10 Sep 2021 18:04:09 +0200 [thread overview]
Message-ID: <20210910160409.GI4323@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <ab6f9ec2-2571-de5a-d44a-427851b08d19@linux.intel.com>
On Tue, Sep 07, 2021 at 01:45:22PM -0400, Liang, Kan wrote:
> On 9/7/2021 12:39 PM, Adrian Hunter wrote:
> > @@ -4494,8 +4500,16 @@ static int intel_pmu_check_period(struct perf_event *event, u64 value)
> > return intel_pmu_has_bts_period(event, value) ? -EINVAL : 0;
> > }
> > +static void intel_aux_output_init(void)
> > +{
> > + /* Refer also intel_pmu_aux_output_match() */
> > + if (x86_pmu.intel_cap.pebs_output_pt_available)
> > + x86_pmu.assign = intel_pmu_assign_event;
> > +}
>
> For a hybrid machine, x86_pmu.intel_cap.pebs_output_pt_available is always
> cleared. We probably need the PMU specific
> pmu->intel_cap.pebs_output_pt_available here.
>
> > +
> > static int intel_pmu_aux_output_match(struct perf_event *event)
> > {
> > + /* intel_pmu_assign_event() is needed, refer intel_aux_output_init() */
> > if (!x86_pmu.intel_cap.pebs_output_pt_available)
> > return 0;
> >
>
> For a hybrid machine, this always return 0. I think we need to fix it first?
AFAICT the patch is correct for !hybrid, and the hybrid PT muck can then
also fix this up, right?
next prev parent reply other threads:[~2021-09-10 16:04 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-07 16:39 [PATCH V3 0/3] perf intel-pt: Add PEBS-via-PT side-band Adrian Hunter
2021-09-07 16:39 ` [PATCH V3 1/3] perf/x86: Add new event for AUX output counter index Adrian Hunter
2021-09-07 17:45 ` Liang, Kan
2021-09-10 16:04 ` Peter Zijlstra [this message]
2021-09-10 16:29 ` Liang, Kan
2021-09-23 18:29 ` Adrian Hunter
2021-09-23 19:22 ` Alexander Shishkin
2021-10-13 9:12 ` Adrian Hunter
2021-10-13 14:17 ` Peter Zijlstra
2021-10-13 15:34 ` Arnaldo Carvalho de Melo
2021-10-15 9:31 ` [tip: perf/core] " tip-bot2 for Adrian Hunter
2021-09-07 16:39 ` [PATCH V3 2/3] perf tools: Add support for PERF_RECORD_AUX_OUTPUT_HW_ID Adrian Hunter
2021-09-07 16:39 ` [PATCH V3 3/3] perf intel-pt: " Adrian Hunter
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