From: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>,
Ingo Molnar <mingo@elte.hu>, Steven Rostedt <rostedt@goodmis.org>,
Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
Franck Bui-Huu <fbuihuu@gmail.com>,
linux-kernel@vger.kernel.org, 2nddept-manager@sdl.hitachi.co.jp,
Paul Mackerras <paulus@samba.org>,
Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Subject: Re: [PATCH -perf/perf/core 4/6] perf: Add strfilter for general purpose string filter
Date: Thu, 13 Jan 2011 22:18:02 +0900 [thread overview]
Message-ID: <4D2EFB8A.5050105@hitachi.com> (raw)
In-Reply-To: <1294923701.19601.108.camel@laptop>
(2011/01/13 22:01), Peter Zijlstra wrote:
> On Thu, 2011-01-13 at 21:46 +0900, Masami Hiramatsu wrote:
>> Format:
>> <rule> ::= <glob-exp> | "!" <rule> | <rule> <op> <rule> | "(" <rule> ")"
>> <op> ::= "&" | "|"
>>
>> e.g.
>> "(add* | del*) & *timer" filter rules pass strings which
>> start with add or del and end with timer.
>
> Why not simply use regexps?
IMHO, regexp is usually too complex and too powerful just for
filtering and the combination of wild cards are simple and enough. :)
Moreover, if you'd like to filter with regexp, you just can use
"| grep" or "| egrep". ;)
(Of course, it is possible to expand this filter to support regexp by simply
adding "~REGEXP" rule as ftrace does)
Thank you,
--
Masami HIRAMATSU
2nd Dept. Linux Technology Center
Hitachi, Ltd., Systems Development Laboratory
E-mail: masami.hiramatsu.pt@hitachi.com
next prev parent reply other threads:[~2011-01-13 13:18 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-13 12:45 [PATCH -perf/perf/core 0/6] Perf probe update (support inline call-site/--funcs/--filter) Masami Hiramatsu
2011-01-13 12:45 ` [PATCH -perf/perf/core 1/6] perf probe: Introduce lines walker interface Masami Hiramatsu
2011-01-26 7:22 ` [tip:perf/core] " tip-bot for Masami Hiramatsu
2011-01-13 12:46 ` [PATCH -perf/perf/core 2/6] perf probe: Enable to put probe inline function call site Masami Hiramatsu
2011-01-26 7:22 ` [tip:perf/core] " tip-bot for Masami Hiramatsu
2011-01-13 12:46 ` [PATCH -perf/perf/core 3/6] perf probe: Add --funcs to show available functions in symtab Masami Hiramatsu
2011-01-13 21:24 ` Franck Bui-Huu
2011-01-14 9:49 ` Masami Hiramatsu
2011-01-14 9:53 ` [PATCH -perf/perf/core ] perf probe: Update perf-probe.txt for --funcs Masami Hiramatsu
2011-01-15 16:42 ` Arnaldo Carvalho de Melo
2011-01-26 7:23 ` [tip:perf/core] perf probe: Add --funcs to show available functions in symtab tip-bot for Masami Hiramatsu
2011-01-13 12:46 ` [PATCH -perf/perf/core 4/6] perf: Add strfilter for general purpose string filter Masami Hiramatsu
2011-01-13 13:01 ` Peter Zijlstra
2011-01-13 13:18 ` Masami Hiramatsu [this message]
2011-01-17 12:40 ` Arnaldo Carvalho de Melo
2011-01-17 12:55 ` Arnaldo Carvalho de Melo
2011-01-17 16:39 ` Masami Hiramatsu
2011-01-18 13:45 ` Masami Hiramatsu
2011-01-13 12:46 ` [PATCH -perf/perf/core 5/6] perf probe: Add variable filter support Masami Hiramatsu
2011-01-13 21:18 ` Franck Bui-Huu
2011-01-14 2:42 ` Masami Hiramatsu
2011-01-17 12:07 ` Arnaldo Carvalho de Melo
2011-01-19 1:12 ` Masami Hiramatsu
2011-01-13 12:46 ` [PATCH -perf/perf/core 6/6] perf probe: Add filters support for available functions Masami Hiramatsu
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