linux-kernel - Re: [PATCH v5 0/8] perf/amd: Zen4 IBS extensions support (tool changes)

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Message-ID: <637d24f2-75d4-d10c-9e08-05edb0c1a972@amd.com>
Date:   Wed, 1 Jun 2022 19:40:54 +0530
From:   Ravi Bangoria <ravi.bangoria@....com>
To:     "Liang, Kan" <kan.liang@...ux.intel.com>, acme@...nel.org
Cc:     jolsa@...nel.org, irogers@...gle.com, peterz@...radead.org,
        rrichter@....com, mingo@...hat.com, mark.rutland@....com,
        namhyung@...nel.org, tglx@...utronix.de, bp@...en8.de,
        james.clark@....com, leo.yan@...aro.org, ak@...ux.intel.com,
        eranian@...gle.com, like.xu.linux@...il.com, x86@...nel.org,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        sandipan.das@....com, ananth.narayan@....com, kim.phillips@....com,
        santosh.shukla@....com, Ravi Bangoria <ravi.bangoria@....com>
Subject: Re: [PATCH v5 0/8] perf/amd: Zen4 IBS extensions support (tool
 changes)


On 01-Jun-22 7:34 PM, Liang, Kan wrote:
> 
> 
> On 5/31/2022 11:26 PM, Ravi Bangoria wrote:
>> Kernel side of changes have already been applied to linus/master
>> (except amd-ibs.h header). This series contains perf tool changes.
>>
>> Kan, I don't have any machine with heterogeneou cpus. It would be
>> helpful if you can check HEADER_PMU_CAPS on Intel ADL machine.
>>
> 
> I tried the patch 2-5 on a hybrid machine. I didn't see any regression with perf report --header-only option.
> 
> Without the patch 2-5,
> # perf report --header-only | grep capabilities
> # cpu_core pmu capabilities: branches=32, max_precise=3, pmu_name=alderlake_hybrid
> # cpu_atom pmu capabilities: branches=32, max_precise=3, pmu_name=alderlake_hybrid
> 
> With the patch 2-5,
> # ./perf report --header-only | grep capabilities
> # cpu_core pmu capabilities: branches=32, max_precise=3, pmu_name=alderlake_hybrid
> # cpu_atom pmu capabilities: branches=32, max_precise=3, pmu_name=alderlake_hybrid
> 

Perfect! Thanks for testing, Kan.

Arnaldo, since kernel patches are already applied to linus' tree for -rc1,
would you be able to include this series in your -rc1 PR?

Thanks,
Ravi