linux-kernel - Re: [GIT PULL] tracing/kprobes: Kprobes core/tracing/profiling updates

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Date:	Wed, 23 Sep 2009 09:42:44 -0700
From:	Masami Hiramatsu <mhiramat@...hat.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Frederic Weisbecker <fweisbec@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Li Zefan <lizf@...fujitsu.com>
Subject: Re: [GIT PULL] tracing/kprobes: Kprobes core/tracing/profiling	updates

Ingo Molnar wrote:
> 
> * Frederic Weisbecker <fweisbec@...il.com> wrote:
> 
>> Hi Ingo,
>>
>> Kprobes has been nicely improved lately. The x86 instruction decoder 
>> has been fixed to support cross builds and mmx instruction set, 
>> besides of a lot of various kprobes core fixes.
>>
>> The tracing part has evolved too, we can define human names for 
>> arguments and custom subsystem names for dynamic tracepoints.
>>
>> And also kprobes profiling and raw dynamic tracepoint samples are now 
>> supported through perf. Looks like most of the kernel parts are now in 
>> place for a perf support. Things are going to be focused on a perf 
>> kprobes tool to exploit that.
> 
> Nice progress. What's the expected timeline of exhaustive tools/perf/ 
> support?

Hi Ingo,

That's under reviewing, I'll post it as soon as possible. :-)
Now I'm considering about it's interface.
In the 1st release, I'll use -P "probe-and-arg-definition" option
which I suggested perviously, but it is also possible to use
-p "event" -a "arg" option which Frederic suggested.

Thank you,

-- 
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America), Inc.
Software Solutions Division

e-mail: mhiramat@...hat.com

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