linux-kernel - Re: [PATCH] softirq,tracing: enable to trace softirq raise latency

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Message-ID: <20091109015812.GA13153@nowhere>
Date:	Mon, 9 Nov 2009 02:58:16 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Lai Jiangshan <laijs@...fujitsu.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Steven Rostedt <rostedt@...dmis.org>,
	Xiao Guangrong <xiaoguangrong@...fujitsu.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	linux-kernel@...r.kernel.org, zhaolei@...fujitsu.com,
	Li Zefan <lizf@...fujitsu.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jason Baron <jbaron@...hat.com>
Subject: Re: [PATCH] softirq,tracing: enable to trace softirq raise latency

On Thu, Nov 05, 2009 at 03:54:55PM +0800, Lai Jiangshan wrote:
> 
> Add a tracepoint for tracing when softirq action is raised.
> 
> It and the existed tracepoints complete softirq's tracepoints:
> softirq_raise, softirq_entry and softirq_exit.
> 
> And when this tracepoint is used in combination with
> the softirq_entry tracepoint we can determine
> the softirq raise latency.
> 
> Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>


Looks good!

Acked-by: Frederic Weisbecker <fweisbec@...il.com>

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