linux-kernel - Re: [PATCH v6 0/7] Event parsing fixes

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Message-ID: <8133d432-7674-4d07-bbb5-4131fe5d474e@linux.intel.com>
Date: Thu, 5 Sep 2024 14:20:54 -0400
From: "Liang, Kan" <kan.liang@...ux.intel.com>
To: James Clark <james.clark@...aro.org>, irogers@...gle.com,
 linux-perf-users@...r.kernel.org, ak@...ux.intel.com, namhyung@...nel.org
Cc: John Garry <john.g.garry@...cle.com>, Will Deacon <will@...nel.org>,
 Mike Leach <mike.leach@...aro.org>, Leo Yan <leo.yan@...ux.dev>,
 Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
 Arnaldo Carvalho de Melo <acme@...nel.org>,
 Mark Rutland <mark.rutland@....com>,
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
 Jiri Olsa <jolsa@...nel.org>, Adrian Hunter <adrian.hunter@...el.com>,
 Weilin Wang <weilin.wang@...el.com>,
 Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
 Dominique Martinet <asmadeus@...ewreck.org>,
 Yang Jihong <yangjihong@...edance.com>,
 Colin Ian King <colin.i.king@...il.com>, Howard Chu <howardchu95@...il.com>,
 Ze Gao <zegao2021@...il.com>, Jing Zhang <renyu.zj@...ux.alibaba.com>,
 Sun Haiyong <sunhaiyong@...ngson.cn>, Yicong Yang
 <yangyicong@...ilicon.com>, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 0/7] Event parsing fixes



On 2024-09-03 6:19 a.m., James Clark wrote:
> I rebased this one and made some other fixes so that I could test it,
> so I thought I'd repost it here in case it's helpful. I also added a
> new test.
> 
> But for the testing it all looks ok.
> 
> There is one small difference where it now hides _all_ default
> <not supported> events, when previously it would only hide some
> selected subset of events like "stalled-cycles-frontend". I think
> this is now more consistent across platforms because, for example,
> Apple M only has cycles and instructions, and the rest of the
> default events would always show as <not supported> there.
> 
> Tested on Raptor Lake, Kaby Lake, Juno, N1, Ampere (with the DSU
> cycles PMU) and I also faked an Apple M on Juno. 
>

The tui mode in perf report is broken on Intel hybrid machine.

$perf record -e cycles,instructions sleep 1
$perf report

Without the patch set, in the tui mode,
Available samples
7 cpu_atom/cycles/
                                     ◆
0 cpu_core/cycles/
                                     ▒
7 cpu_atom/instructions/
                                     ▒
0 cpu_core/instructions/
                                     ▒
0 dummy:u

After applying the patch set,
Available samples
7 /cycles/
                                     ◆
0 /cycles/
                                     ▒
7 /instructions/
                                     ▒
0 /instructions/
                                     ▒
0 dummy:u


It looks something wrong with the uniquify_event_name().

Thanks,
Kan


> Changes since v5:
>   * Test on x86 non hybrid
>   * Assume 1 PMU in the test when no PMUs expose /cpus file
> 
> Changes since v4:
> 
>   * Hide all <not supported> default events when not verbose
>   * Remove previous note about <not supported> behavior from the cover
>     letter and replace it with a new note about the new behavior
>  
> Changes since v3:
> 
>   * Rebase onto perf-tools-next 6236ebe07
>   * Fix Intel TPEBS counting mode test
>   * Fix arm-spe build
>   * Add support for DT devices in stat test
>   * Add a new test for hybrid perf stat default arguments
> 
> Ian Rogers (5):
>   perf evsel: Add alternate_hw_config and use in evsel__match
>   perf stat: Uniquify event name improvements
>   perf stat: Remove evlist__add_default_attrs use strings
>   perf evsel x86: Make evsel__has_perf_metrics work for legacy events
>   perf evsel: Remove pmu_name
> 
> James Clark (2):
>   perf test: Make stat test work on DT devices
>   perf test: Add a test for default perf stat command
> 
>  tools/perf/arch/arm64/util/arm-spe.c          |   4 +-
>  tools/perf/arch/x86/util/evlist.c             |  74 +----
>  tools/perf/arch/x86/util/evsel.c              |  35 ++-
>  tools/perf/builtin-diff.c                     |   6 +-
>  tools/perf/builtin-stat.c                     | 291 +++++++-----------
>  tools/perf/tests/parse-events.c               |   2 +-
>  tools/perf/tests/shell/stat.sh                |  37 ++-
>  .../perf/tests/shell/test_stat_intel_tpebs.sh |  11 +-
>  tools/perf/util/evlist.c                      |  46 +--
>  tools/perf/util/evlist.h                      |  12 -
>  tools/perf/util/evsel.c                       |  28 +-
>  tools/perf/util/evsel.h                       |  22 +-
>  tools/perf/util/metricgroup.c                 |   4 +-
>  tools/perf/util/parse-events.c                |  58 ++--
>  tools/perf/util/parse-events.h                |   8 +-
>  tools/perf/util/parse-events.y                |   2 +-
>  tools/perf/util/pmu.c                         |   6 +-
>  tools/perf/util/pmu.h                         |   2 +-
>  tools/perf/util/stat-display.c                | 109 +++++--
>  tools/perf/util/stat-shadow.c                 |  14 +-
>  tools/perf/util/stat.c                        |   2 +-
>  21 files changed, 360 insertions(+), 413 deletions(-)
>