From: Chuck Ebbert <cebbert@redhat.com>
To: Mikhail Kshevetskiy <mikhail.kshevetskiy@gmail.com>
Cc: linux-kernel@vger.kernel.org, Thomas Gleixner <tglx@linutronix.de>
Subject: Re: x86_64 and AMD with C1E
Date: Fri, 19 Oct 2007 12:39:19 -0400 [thread overview]
Message-ID: <4718DDB7.7070707@redhat.com> (raw)
In-Reply-To: <20071001101532.025d652f@localhost>
On 10/01/2007 02:15 AM, Mikhail Kshevetskiy wrote:
> Hello,
>
> I have ASUS F3T notebook with dualcore AMD processor. It has c1e feature
> enabled. I test linux-2.6.23-rc8-hrt1 kernel. Everything is work (thanks
> to lapic disable patch), but i have to many processor interrupts per
> seconds (about 260 additional timer interrupts).
>
> The same situation can be observed for linux-2.6.22. Moreover the same
> problem exist with i386 kernel (test with 2.6.21, 2.6.22, 2.6.22-hrt6,
> 2.6.23-rc5-hrt1).
>
> The problem disappear when I disable c1e on both cores. In this case
> lapic is not disabled. The back side of this patch is the disabling of
> all C-state including C1. As result the power consumption increase from
> 23 (c1e enabled) to 27 (c1e disabled) watts.
>
> I fill something wrong here.
> Is it possible to reduce the amount of timer interrupts?
> Is it possible to force enable C1,C2 and C3 states when c1e disabled?
>
How are you disabling C1E?
next prev parent reply other threads:[~2007-10-19 16:39 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-01 6:15 x86_64 and AMD with C1E Mikhail Kshevetskiy
2007-10-01 9:33 ` Andi Kleen
[not found] ` <b70f2f960710010546k4658aa1ay466f243ac707c989@mail.gmail.com>
2007-10-01 12:50 ` Fwd: " Mikhail Kshevetskiy
2007-10-01 14:14 ` Thomas Gleixner
2007-10-01 14:32 ` Andi Kleen
2007-10-01 14:59 ` Thomas Gleixner
2007-10-01 15:21 ` Andi Kleen
2007-10-01 16:44 ` Thomas Gleixner
2007-10-01 17:56 ` Chuck Ebbert
2007-10-01 14:33 ` Mikhail Kshevetskiy
2007-10-01 13:09 ` Andi Kleen
2007-10-01 14:06 ` Arjan van de Ven
2007-10-01 14:40 ` Mikhail Kshevetskiy
2007-10-19 16:39 ` Chuck Ebbert [this message]
2007-10-24 21:26 ` Mikhail Kshevetskiy
2007-10-24 21:41 ` Chuck Ebbert
2007-10-24 22:12 ` Thomas Gleixner
2007-10-24 22:42 ` Mikhail Kshevetskiy
2007-12-15 11:06 ` Thomas Gleixner
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