linux-kernel - Re: [RFC 1/4] ftrace: Add events for tracing timer interrupts

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Message-ID: <87zkvsweq6.fsf@basil.nowhere.org>
Date:	Wed, 08 Sep 2010 15:24:01 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Jan Blunck <jblunck@...e.de>
Cc:	Linux-Kernel Mailinglist <linux-kernel@...r.kernel.org>,
	linux-rt-users@...r.kernel.org, peterz@...radead.org,
	Sven-Thorsten Dietrich <sdietrich@...ell.com>,
	Michael Galbraith <MGalbraith@...ell.com>
Subject: Re: [RFC 1/4] ftrace: Add events for tracing timer interrupts

Jan Blunck <jblunck@...e.de> writes:

> Trace the execution of the timer interrupt. I did not find an argument that
> makes any sense so traces look like this:
>
> <idle>-0     [000] 181019.693546: timerirq_enter: unused=1
> <idle>-0     [000] 181019.693553: timerirq_exit: unused=1

I think you can get the same by just filtering the normal
irq entry for the timer irq  number.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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