linux-kernel - Re: [PATCH v2 0/4] perf tool: Skip invalid hybrid PMU

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Message-ID: <YOsT0NFC53WIku2k@krava>
Date:   Sun, 11 Jul 2021 17:52:48 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Jin Yao <yao.jin@...ux.intel.com>
Cc:     acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
        mingo@...hat.com, alexander.shishkin@...ux.intel.com,
        Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
        kan.liang@...el.com, yao.jin@...el.com
Subject: Re: [PATCH v2 0/4] perf tool: Skip invalid hybrid PMU

On Thu, Jul 08, 2021 at 09:36:57AM +0800, Jin Yao wrote:
> On hybrid platform, such as Alderlake, if atom CPUs are offlined,
> the kernel still exports the sysfs path '/sys/devices/cpu_atom/' for
> 'cpu_atom' pmu but the file '/sys/devices/cpu_atom/cpus' is empty,
> which indicates this is an invalid pmu. So we need to check and skip
> the invalid hybrid pmu.
> 
> Also we need to update some perf test cases for core-only system.
> 
> Jin Yao (4):
>   perf pmu: Skip invalid hybrid pmu
>   perf tests: Fix 'Parse event definition strings' on core-only system
>   perf tests: Fix 'Roundtrip evsel->name' on core-only system
>   perf tests: Fix 'Convert perf time to TSC' on core-only system

Acked-by: Jiri Olsa <jolsa@...hat.com>

thanks,
jirka

> 
>  tools/perf/tests/evsel-roundtrip-name.c |  3 ++-
>  tools/perf/tests/parse-events.c         | 16 ++++++++++------
>  tools/perf/tests/perf-time-to-tsc.c     |  3 ++-
>  tools/perf/util/pmu.c                   |  9 ++++++++-
>  4 files changed, 22 insertions(+), 9 deletions(-)
> 
> -- 
> 2.17.1
>