linux-kernel - Re: [PATCH 4/6] trace: Add tracepoints to reschedule interrupt handler

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Message-ID: <1310719682.2586.289.camel@twins>
Date:	Fri, 15 Jul 2011 10:48:02 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Vaibhav Nagarnaik <vnagarnaik@...gle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Michael Rubin <mrubin@...gle.com>,
	David Sharp <dhsharp@...gle.com>, linux-kernel@...r.kernel.org,
	x86@...nel.org
Subject: Re: [PATCH 4/6] trace: Add tracepoints to reschedule interrupt
 handler

On Fri, 2011-07-15 at 00:02 +0200, Frederic Weisbecker wrote:
> > This is a part of overall effort to trace all the interrupts happening
> > in a system to figure out what time is spent in kernel space versus user
> > space. 

How about you enable CONFIG_IRQ_TIME_ACCOUNTING and get all that?
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