linux-kernel - Re: 100% C0 with 2.6.25-rc

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Message-Id: <200802211733.54759.rjw@sisk.pl>
Date:	Thu, 21 Feb 2008 17:33:53 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Jan Willies <jan@...lies.info>
Cc:	linux-acpi@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Venki Pallipadi <venkatesh.pallipadi@...el.com>
Subject: Re: 100% C0 with 2.6.25-rc

On Thursday, 21 of February 2008, Jan Willies wrote:
> Hi,
> 
> Since 2.6.25-rc1 I have a lot of wakeups/s (≈134191,4) and spend 100% in C0.
> It worked fine with 2.6.24 and commandline nolapic. Without nolapic I had 80k
> wakeups/s after some time, but not right from the start like now.  

We have a regression from 2.6.24, apparently interrupts-related.

> What useful information can I provide?

Let's see what the experts say.

Thanks,
Rafael
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