linux-kernel - Re: [RFC 00/10] perf tools: Add support to reuse metric

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Message-ID: <20200626215759.GG818054@tassilo.jf.intel.com>
Date:   Fri, 26 Jun 2020 14:57:59 -0700
From:   Andi Kleen <ak@...ux.intel.com>
To:     Ian Rogers <irogers@...gle.com>
Cc:     Jiri Olsa <jolsa@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Michael Petlan <mpetlan@...hat.com>,
        Kajol Jain <kjain@...ux.ibm.com>,
        John Garry <john.garry@...wei.com>,
        "Paul A. Clarke" <pc@...ibm.com>,
        Stephane Eranian <eranian@...gle.com>
Subject: Re: [RFC 00/10] perf tools: Add support to reuse metric

> The name could be a metric or an event, the logic for each is quite

I would say collisions are unlikely. Event names follow quite structured
patterns.

> different. You could look up an event and when it fails assume it was
> a metric, but I like the simplicity of this approach.

I don't think it's simpler for the user.

> Maybe this
> change could be adopted more widely with something like "perf stat -e
> metric:IPC -a -I 1000" rather than the current "perf stat -M IPC -a -I
> 1000".

I thought about just adding metrics to -e, without metric: of course.

-Andi