linux-kernel - Re: [PATCH v1 2/3] perf parse-events: Make common term list to strbuf helper

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Message-ID: <127766c6-033c-dedb-2c56-7e1e7f8bd01b@linux.intel.com>
Date:   Wed, 30 Aug 2023 15:34:56 -0400
From:   "Liang, Kan" <kan.liang@...ux.intel.com>
To:     Ian Rogers <irogers@...gle.com>
Cc:     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>,
        Namhyung Kim <namhyung@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        James Clark <james.clark@....com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 2/3] perf parse-events: Make common term list to strbuf
 helper



On 2023-08-30 2:29 p.m., Liang, Kan wrote:
>> The problem
>> is how we encode terms of an event name, it is indistinguishable when
>> the of the user field is 1. I'll probably add something to fix this
>> later, but it only impacts debug output and perf list, so I'm not
>> overly worried. 
> It should be OK for the debug output.
>

Not just the debug output. It also impacts the perf list --detail.

With the patch,
perf list --detail | grep uops_retired.heavy -A 2
  uops_retired.heavy
       [Retired uops except the last uop of each instruction. Unit:
cpu_core]
        cpu_core/event=0xc2,period=0x1e8483,umask/

Without the patch,
perf list --detail | grep uops_retired.heavy -A 2
  uops_retired.heavy
       [Retired uops except the last uop of each instruction. Unit:
cpu_core]
        cpu_core/event=0xc2,period=0x1e8483,umask=0x1/

Thanks,
Kan