linux-kernel - Re: [PATCH tracing/kprobes 0/7] tracing/kprobes: kprobe-based event tracer update and perf support

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Message-ID: <20090911153609.GA6069@nowhere>
Date:	Fri, 11 Sep 2009 17:36:10 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Masami Hiramatsu <mhiramat@...hat.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>, Ingo Molnar <mingo@...e.hu>,
	lkml <linux-kernel@...r.kernel.org>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Andi Kleen <ak@...ux.intel.com>,
	Christoph Hellwig <hch@...radead.org>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, Jason Baron <jbaron@...hat.com>,
	Jim Keniston <jkenisto@...ibm.com>,
	"K.Prasad" <prasad@...ux.vnet.ibm.com>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Li Zefan <lizf@...fujitsu.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Tom Zanussi <tzanussi@...il.com>,
	systemtap <systemtap@...rces.redhat.com>,
	DLE <dle-develop@...ts.sourceforge.net>
Subject: Re: [PATCH tracing/kprobes 0/7] tracing/kprobes: kprobe-based
	event tracer update and perf support

On Thu, Sep 10, 2009 at 07:52:58PM -0400, Masami Hiramatsu wrote:
> Hi Frederic,
> 
> This series fixes bugs and upgrades kprobe-based event tracer
> as a dynamic event tracer on ftrace/perf tools. This also enhances
> tracer output format to show each argument name and event name on
> each entry.
> 
> With this series, users can add trace events dynamically on ftrace
> and use those events with perf tools as below.
> 
> (Step.1) Define new events under new group
> 
> $ echo p:mygroup/myprobe do_sys_open dfd=a0 filename=a1 flags=a2 mode=a3 \
>  > /debug/tracing/kprobes_events
> $ echo r:mygroup/myretprobe do_sys_open rv >> /debug/tracing/kprobes_events
> $ cat /debug/tracing/kprobes_events
> p:myprobe do_sys_open+0 dfd=a0 filename=a1 flags=a2 mode=a3
> r:myretprobe do_sys_open+0 rv=rv



I've tested the above example and it works very well,
so I've applied this set, and the previous pending patches
in:

git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing.git \
	tracing/kprobes

Thanks.

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