linux-kernel - Re: [PATCH] perf stat: Support regex pattern in --for-each-cgroup

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Message-ID: <20201023170422.GS466880@tassilo.jf.intel.com>
Date:   Fri, 23 Oct 2020 10:04:22 -0700
From:   Andi Kleen <ak@...ux.intel.com>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...hat.com>, Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Stephane Eranian <eranian@...gle.com>,
        Ian Rogers <irogers@...gle.com>
Subject: Re: [PATCH] perf stat: Support regex pattern in --for-each-cgroup

On Fri, Oct 23, 2020 at 04:42:34PM +0900, Namhyung Kim wrote:
> To make the command line even more compact with cgroups, support regex
> pattern matching in cgroup names.
> 
>   $ perf stat -a -e cpu-clock,cycles --for-each-cgroup '^.$' sleep 1

The example doesn't exactly show the benefit. So ^.$ would be only
for one character cgroups?

Missing documentation updates.

-Andi