From: Len Brown <len.brown@intel.com>
To: Mathew Brown <mathewbrown@fastmail.fm>
Cc: linux-acpi@vger.kernel.org
Subject: Re: SMP C-states on x86_64 Status
Date: Mon, 6 Nov 2006 12:44:55 -0500 [thread overview]
Message-ID: <200611061244.56455.len.brown@intel.com> (raw)
In-Reply-To: <1162726672.25981.275035845@webmail.messagingengine.com>
On Sunday 05 November 2006 06:37, Mathew Brown wrote:
> Hi,
> I just saw Adrian's post on a patch to add SMP C-states on x86_64 to
> kernel 2.6.16. Is there anywhere I can find the current status of
> C-states on SMP machines? I have a 16-core machine running RHEL with
> kernel 2.6.9-34 and it shows only C0, nothing else. I checked the
> DSDT and it compiled without error. Any ideas? Thanks for your help.
This support (bugzilla 5653) shipped starting in 2.6.18, and I sent it to Adrian
for 2.6.16.stable -- and it appears it will pop out in 2.6.16.31.
Re: your 16 core machine running 2.6.9...
What does /proc/acpi/processor/*/power say?
I would expect it to say C1 only.
I would not expect this box to grow deeper C-states upon the support above.
The only SMP boxes with C-states deeper than C1 that I'm aware of today
are laptops.
cheers,
-Len
next prev parent reply other threads:[~2006-11-06 17:42 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-05 11:37 SMP C-states on x86_64 Status Mathew Brown
2006-11-06 17:44 ` Len Brown [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-11-07 12:51 Mathew Brown
2006-11-14 6:41 ` Len Brown
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