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

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Message-ID: <CAM9d7civtQsnmDCSF-uWaeh01XLkdpdRcEaTsYA5piRo_E2tnQ@mail.gmail.com>
Date:   Sat, 24 Oct 2020 11:25:49 +0900
From:   Namhyung Kim <namhyung@...nel.org>
To:     Andi Kleen <ak@...ux.intel.com>
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

Hi Andi,

On Sat, Oct 24, 2020 at 2:04 AM Andi Kleen <ak@...ux.intel.com> wrote:
>
> 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?

Right, I know it's not a good example but just wanted to show the
possibility of regex patterns.  Let me come up with a better one.

>
> Missing documentation updates.

Will add.

Thanks
Namhyung