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

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Date:	Wed, 23 Sep 2009 14:04:26 +0200
From:	Frédéric Weisbecker <fweisbec@...il.com>
To:	Ingo Molnar <mingo@...e.hu>, Masami Hiramatsu <mhiramat@...hat.com>
Cc:	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

2009/9/23 Ingo Molnar <mingo@...e.hu>:
>
> * 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?


Masami is better suited to answer that, so I let him respond.


>> Concerning this git tree, based on tip:/tracing/kprobes, I had to
>> merge tracing/core inside few weeks ago because it needed build fixes
>> that were in tracing/core (the merge commit provides the details). The
>> tree is self contained but it's already async with recent upstream
>> tracing updates. It means that merging upstream tree or tracing/core
>> inside may result in non-trivial conflicts. I can handle them, or
>> rebase the whole, as you prefer.
>>
>> The tree can be found at:
>>
>> git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing.git
>>       tracing/kprobes
>
> Would be nice to merge latest -git into this tree and resolve the
> conflicts:
>
>  kernel/trace/Makefile
>  kernel/trace/trace.h
>  kernel/trace/trace_event_types.h
>  kernel/trace/trace_export.c
>
> Then i could pull it into tip:tracing/kprobes for more testing.


Sure, I'll do that soon.

Frederic.
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