linux-kernel - Re: [PATCH] perf record: Allow passing perf's own pid to '--filter'

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Message-ID: <20150706185813.GJ16826@kernel.org>
Date:	Mon, 6 Jul 2015 15:58:13 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Wang Nan <wangnan0@...wei.com>, a.p.zijlstra@...llo.nl,
	mingo@...hat.com, jolsa@...nel.org, peterz@...radead.org,
	namhyung@...nel.org, kan.liang@...el.com, adrian.hunter@...el.com,
	ak@...ux.intel.com, cody@...ux.vnet.ibm.com,
	jacob.w.shin@...il.com, standby24x7@...il.com, lizefan@...wei.com,
	yunlong.song@...wei.com, linux-kernel@...r.kernel.org,
	pi3orama@....com
Subject: Re: [PATCH] perf record: Allow passing perf's own pid to '--filter'

Em Mon, Jul 06, 2015 at 12:37:02PM -0400, Steven Rostedt escreveu:
> On Mon, 6 Jul 2015 10:56:50 -0300 Arnaldo Carvalho de Melo <acme@...nel.org> wrote:
> > > This patch introduces '@...FPID' placeholder to '--filter' options. Now
> > > user is allowed to the above work with:

> > >   # perf record -e ... --filter="common_pid != @PERFPID' sleep 10
 
> What about using '$' instead. That is more common to shell scripts of
> being a variable.

Agreed.

- Arnaldo
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