linux-kernel - Re: [PATCH v2] perf pmu: Fix alias events list

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Date:   Tue, 28 Dec 2021 21:00:18 +0000
From:   John Garry <john.garry@...wei.com>
To:     <peterz@...radead.org>, <mingo@...hat.com>, <acme@...nel.org>,
        <mark.rutland@....com>, <alexander.shishkin@...ux.intel.com>,
        <jolsa@...hat.com>, <namhyung@...nel.org>, <irogers@...gle.com>,
        <kan.liang@...ux.intel.com>
CC:     <linux-perf-users@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <zhengjun.xing@...ux.intel.com>
Subject: Re: [PATCH v2] perf pmu: Fix alias events list

On 21/12/2021 16:11, John Garry wrote:
> Commit 0e0ae8742207 ("perf list: Display hybrid PMU events with cpu type")
> changes the event list for uncore PMUs or arm64 heterogeneous CPU systems,
> such that duplicate aliases are incorrectly listed per PMU (which they
> should not be), like:
> 
> ./perf list
> ...
> unc_cbo_cache_lookup.any_es
> [Unit: uncore_cbox L3 Lookup any request that access cache and found
> line in E or S-state]
> unc_cbo_cache_lookup.any_es
> [Unit: uncore_cbox L3 Lookup any request that access cache and found
> line in E or S-state]
> unc_cbo_cache_lookup.any_i
> [Unit: uncore_cbox L3 Lookup any request that access cache and found
> line in I-state]
> unc_cbo_cache_lookup.any_i
> [Unit: uncore_cbox L3 Lookup any request that access cache and found
> line in I-state]
> ...
> 
> Notice how the events are listed twice.


Hi Arnaldo,

Can you kindly consider picking up this change for v5.16?

Thanks!