From: Timo Hoenig <thoenig@nouse.net>
To: "Brown, Len" <len.brown@intel.com>
Cc: shadow@serverart.org, linux-acpi@vger.kernel.org
Subject: RE: [PATCH 2.6.18 1/1] ACPI: limit cstate on noisy thinkpad t43/p models
Date: Sun, 24 Sep 2006 13:38:02 +0200 [thread overview]
Message-ID: <1159097883.5437.12.camel@nouse.suse.de> (raw)
In-Reply-To: <CFF307C98FEABE47A452B27C06B85BB6018F099A@hdsmsx411.amr.corp.intel.com>
Hi,
On Thu, 2006-09-21 at 18:05 -0400, Brown, Len wrote:
> Turning off C3 is a pretty big hammer...
Indeed.
I think it is a more general problem. The systems with Intel Core Duo I
got my hands on all show the symptom: Once the system is idle, the
second core begins to whine. It's annoying in quiet environments.
* Turning off the second core makes the whining stop.
* Booting with processor.max_cstate=2 does also make the whining
go away; but it's a bad idea on laptops if once wants to gain a
long run on batteries.
Tested with HZ=250; I'll check whether HZ=100/1000 helps.
Timo
next prev parent reply other threads:[~2006-09-24 11:38 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-21 22:05 [PATCH 2.6.18 1/1] ACPI: limit cstate on noisy thinkpad t43/p models Brown, Len
2006-09-22 13:13 ` Sanjoy Mahajan
2006-09-24 11:38 ` Timo Hoenig [this message]
2006-09-25 7:06 ` Len Brown
2006-09-25 13:50 ` Timo Hoenig
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