linux-kernel - Re: [PATCH 7/7] ftrace, perf: Add filter support for function trace event

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Date:	Mon, 16 Jan 2012 18:59:08 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	fweisbec@...il.com, mingo@...hat.com, paulus@...ba.org,
	acme@...stprotocols.net, a.p.zijlstra@...llo.nl,
	linux-kernel@...r.kernel.org, aarapov@...hat.com
Subject: Re: [PATCH 7/7] ftrace, perf: Add filter support for function trace
 event

On Mon, 2012-01-02 at 10:04 +0100, Jiri Olsa wrote:
> Adding support to filter function trace event via perf
> interface. It is now possible to use filter interface
> in the perf tool like:
> 
>   perf record -e ftrace:function --filter="(ip == mm_*)" ls
> 
> The filter syntax is restricted to the the 'ip' field only,
> and following operators are accepted '==' '!=' '||', ending
> up with the filter strings like:
> 
>   ip == f1[, ]f2 ... || ip != f3[, ]f4 ...
> 
> with comma ',' or space ' ' as a function separator. If the
> space ' ' is used as a separator, the right side of the
> assignment needs to be enclosed in double quotes '"'.
> 
> The '==' operator adds trace filter with same effect as would
> be added via set_ftrace_filter file.
> 
> The '!=' operator adds trace filter with same effect as would
> be added via set_ftrace_notrace file.
> 
> The right side of the '!=', '==' operators is list of functions
> or regexp. to be added to filter separated by space.
> 
> The '||' operator is used for connecting multiple filter definitions
> together. It is possible to have more than one '==' and '!='
> operators within one filter string.

Hate to ask you this, but can you rebase this patch against latest
tip/perf/core? Things have changed that cause this patch not to apply.

I'll go ahead and test your other 6 patches.

Thanks!

-- Steve


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