From: "Ray Bryant" <raybry@mpdtxmail.amd.com>
To: "Andi Kleen" <ak@suse.de>
Cc: "Daniel Jacobowitz" <dan@debian.org>,
"john stultz" <johnstul@us.ibm.com>,
"Andrew Morton" <akpm@osdl.org>,
"lkml" <linux-kernel@vger.kernel.org>,
discuss@x86-64.org
Subject: Re: [discuss] Re: [PATCH] x86-64: Fix bad assumption that dualcore cpus have synced TSCs
Date: Wed, 21 Sep 2005 10:46:25 -0500 [thread overview]
Message-ID: <200509211046.25555.raybry@mpdtxmail.amd.com> (raw)
In-Reply-To: <20050921150404.GD12810@verdi.suse.de>
On Wednesday 21 September 2005 10:04, Andi Kleen wrote:
>
> We handle this, but single socket dual core was special cased because
> I was told previously it should be ok.
>
> -Andi
AFAIK there is a processor state bit that enables/disables this behavior.
Apparently some BIOS's are setting this one way for desktop systems and the
other way for servers. If it is thought to be important I can track that
down and see if it can be externally documented. (It may actually be in the
bios and kernel developer guide...)
--
Ray Bryant
AMD Performance Labs Austin, Tx
512-602-0038 (o) 512-507-7807 (c)
next prev parent reply other threads:[~2005-09-21 15:26 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-19 19:16 [PATCH] x86-64: Fix bad assumption that dualcore cpus have synced TSCs john stultz
2005-09-19 19:31 ` Andi Kleen
2005-09-19 19:42 ` john stultz
2005-09-19 19:49 ` [discuss] " Andi Kleen
2005-09-20 18:59 ` john stultz
2005-09-21 4:03 ` Daniel Jacobowitz
2005-09-21 15:15 ` Ray Bryant
2005-09-21 15:04 ` Andi Kleen
2005-09-21 15:46 ` Ray Bryant [this message]
2005-09-22 8:00 ` Jonas Oreland
2005-09-21 20:17 ` Andrew Morton
2005-10-07 12:26 ` Vladimir B. Savkin
2005-10-07 12:31 ` Andi Kleen
2005-10-07 14:15 ` Vladimir B. Savkin
2005-10-07 14:21 ` [discuss] " Velu Erwan
2005-10-08 10:11 ` Vladimir B. Savkin
2005-10-10 18:03 ` john stultz
2005-10-10 18:12 ` Vladimir B. Savkin
2005-10-10 18:19 ` Jonas Oreland
2005-10-11 7:35 ` Vladimir B. Savkin
2005-10-11 8:06 ` Andi Kleen
2005-10-11 16:27 ` Jonas Oreland
2005-10-25 7:35 ` x86-64: Syncing dualcore cpus TSCs Jonas Oreland
2005-10-25 7:42 ` Andi Kleen
2005-10-26 0:05 ` David Lang
-- strict thread matches above, loose matches on Subject: below --
2005-09-20 19:13 [discuss] Re: [PATCH] x86-64: Fix bad assumption that dualcore cpus have synced TSCs Langsdorf, Mark
2005-09-20 19:24 ` Scott Lampert
2005-09-20 19:30 ` john stultz
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