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Message-ID: <5bdc1c8b0706101038q2f0e3418t1a595e749b5bfe71@mail.gmail.com>
Date: Sun, 10 Jun 2007 10:38:05 -0700
From: "Mark Knecht" <markknecht@gmail.com>
To: "Ingo Molnar" <mingo@elte.hu>
Subject: Re: 2.6.21-rt9 - IRQ23 consuming a steady 2.7% of CPU
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
       "Lee Revell" <rlrevell@gmail.com>
In-Reply-To: <20070610172452.GA7560@elte.hu>
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	 <20070610172452.GA7560@elte.hu>
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On 6/10/07, Ingo Molnar <mingo@elte.hu> wrote:
>
> * Mark Knecht <markknecht@gmail.com> wrote:
>
> > 23:    1739277   IO-APIC-fasteoi   ohci_hcd:usb2, eth0
>
> > 00:0a.0 Bridge: nVidia Corporation CK804 Ethernet Controller (rev a3)
>
> ok, that's forcedeth. Does that behavior go away if you revert the
> change below, via patch -p0 -R ?
>
> but in general, -rt will track IRQ cpu usage accurately, while mainline
> does not measure it at all when in idle. So a frequent IRQ on mainline
> might be using up similar amounts of of CPU time as well, but it's not
> reported.
>
>         Ingo
>

Ingo,
   GMail is being kranky. Can you please send the patch as a zipped attachment?

Thanks,
Mark