From: Andi Kleen <ak@linux.intel.com>
To: Jiri Olsa <jolsa@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>,
acme@kernel.org, jolsa@kernel.org, linux-kernel@vger.kernel.org,
mingo@kernel.org
Subject: Re: [PATCH 07/11] perf, tools: Collapse identically named events in perf stat
Date: Wed, 18 Jan 2017 08:31:26 -0800 [thread overview]
Message-ID: <20170118163126.GE5460@tassilo.jf.intel.com> (raw)
In-Reply-To: <20170118124446.GE11946@krava>
> > % perf stat -a -e unc_c_llc_lookup.any sleep 1
> >
> > Performance counter stats for 'system wide':
> >
> > 2,685,120 Bytes unc_c_llc_lookup.any
> >
> > 1.002648032 seconds time elapsed
>
>
> if one of them is not supported, we get wrong output:
I would argue the output is not incorrect, after all it is not supported
if something is missing.
Imagine this is run with an interval:
If we changed the number of output lines based on some dynamic scheduling
condition this could confuse post processing scripts or users. Some output
records would be completely different than others. So marking everything
merged <not supported> in these cases is better and more consistent.
It is also difficult to change and should be a rare condition.
-Andi
next prev parent reply other threads:[~2017-01-18 16:32 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-03 15:08 Support Intel uncore event lists v4 Andi Kleen
2017-01-03 15:08 ` [PATCH 01/11] perf, tools: Factor out scale conversion code Andi Kleen
2017-01-08 18:57 ` Jiri Olsa
2017-01-08 18:57 ` Jiri Olsa
2017-01-12 13:31 ` Arnaldo Carvalho de Melo
2017-01-12 18:07 ` Arnaldo Carvalho de Melo
2017-01-18 9:19 ` [tip:perf/core] perf pmu: " tip-bot for Andi Kleen
2017-01-03 15:08 ` [PATCH 02/11] perf, tools: Parse eventcode as number in jevents Andi Kleen
2017-01-08 18:57 ` Jiri Olsa
2017-01-10 1:10 ` Andi Kleen
2017-01-18 11:56 ` Jiri Olsa
2017-01-03 15:08 ` [PATCH 03/11] perf, tools: Add support for parsing uncore json files Andi Kleen
2017-01-08 18:58 ` Jiri Olsa
2017-01-12 13:32 ` Arnaldo Carvalho de Melo
2017-01-08 19:00 ` Jiri Olsa
2017-01-03 15:08 ` [PATCH 04/11] perf, tools: Support per pmu json aliases Andi Kleen
2017-01-18 11:58 ` Jiri Olsa
2017-01-19 0:17 ` Andi Kleen
2017-01-19 10:42 ` Jiri Olsa
2017-01-03 15:08 ` [PATCH 05/11] perf, tools: Support event aliases for non cpu// pmus Andi Kleen
2017-01-18 12:10 ` Jiri Olsa
2017-01-03 15:08 ` [PATCH 06/11] perf, tools: Add debug support for outputing alias string Andi Kleen
2017-01-18 12:16 ` Jiri Olsa
2017-01-18 15:45 ` Andi Kleen
2017-01-18 16:18 ` Jiri Olsa
2017-01-18 12:16 ` Jiri Olsa
2017-01-03 15:08 ` [PATCH 07/11] perf, tools: Collapse identically named events in perf stat Andi Kleen
2017-01-18 12:44 ` Jiri Olsa
2017-01-18 16:31 ` Andi Kleen [this message]
2017-01-18 16:56 ` Jiri Olsa
2017-01-18 17:28 ` Andi Kleen
2017-01-03 15:08 ` [PATCH 08/11] perf, tools: Expand PMU events by prefix match Andi Kleen
2017-01-03 15:08 ` [PATCH 09/11] perf, tools: Add a simple expression parser for JSON Andi Kleen
2017-01-03 15:08 ` [PATCH 10/11] perf, tools: Support MetricExpr header in JSON event list Andi Kleen
2017-01-03 15:08 ` [PATCH 11/11] perf, tools, stat: Output JSON MetricExpr metric Andi Kleen
-- strict thread matches above, loose matches on Subject: below --
2017-01-10 1:33 Support Intel uncore event lists v4 Andi Kleen
2017-01-10 1:33 ` [PATCH 07/11] perf, tools: Collapse identically named events in perf stat Andi Kleen
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