linux-kernel - Re: is it a timer bug?

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Message-ID: <20081215090925.7a8f5c6d@infradead.org>
Date:	Mon, 15 Dec 2008 09:09:25 +0100
From:	Arjan van de Ven <arjan@...radead.org>
To:	"Shi, Alex" <alex.shi@...el.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: is it a timer bug?

On Mon, 15 Dec 2008 15:07:17 +0800
"Shi, Alex" <alex.shi@...el.com> wrote:

> I notice the timer interrupts is quit high on the 2.6.28-rc8 kernel
> in my Nehalem machine. A, 180+/second timer interrupts in my Nehalem
> machine with tickless enable. B, the timer interrupts reduce to
> 10-/second with tickless and highres enable. On 2.6.27 kernel, the
> timer interrupts can keep low with tickless kernel whenever the
> highres feature is enable or not. So it is timer bug on my machine? 
> 

Hi,

can you give us the powertop output of these production Core i7 
machines? That is the most likely way to get a clue about what is going
on...

Greetings,
   Arjan van de Ven

-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org
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