linux-kernel - Re: [PATCH -perf/perf/core 5/6] perf probe: Add variable filter support

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Date:	Thu, 13 Jan 2011 22:18:24 +0100
From:	Franck Bui-Huu <vagabon.xyz@...il.com>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Ingo Molnar <mingo@...e.hu>,
	Steven Rostedt <rostedt@...dmis.org>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org, 2nddept-manager@....hitachi.co.jp,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Chase Douglas <chase.douglas@...onical.com>
Subject: Re: [PATCH -perf/perf/core  5/6] perf probe: Add variable filter support

Masami Hiramatsu <masami.hiramatsu.pt@...achi.com> writes:

> Add filters support for available variable list.
> Default filter is "!__k???tab_*&!__crc_*" for
> filtering out automatically generated symbols.
>
> The format of filter rule is "[!]GLOBPATTERN", so
> you can use wild cards. If the filter rule starts with
> '!', matched variables are filter out.
>
> e.g.)
>  # perf probe -V schedule --externs --filter=cpu*

I'm wondering if the different syntax below could be simpler:

   $ perf probe add <probe>
   $ perf probe del <probe>
   $ perf probe show       

   $ perf probe list <line>
           ...       --vars[=<pattern>] [--externs] <probe>
           ...       --funcs[=<pattern>]

instead of respectively:

   $ perf probe --add=<probe>
   $ perf probe --del=<probe>
   $ perf probe [--list|-l]       

   $ perf probe [--line|-L] <line>
   $ perf probe -V <probe> [--externs] [--filter=<pattern>]
   $ perf probe --funcs

-- 
		Franck
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