From: James Cleverdon <jamesclv@us.ibm.com>
To: Zwane Mwaikambo <zwane@linuxpower.ca>,
Linus Torvalds <torvalds@transmeta.com>
Cc: "Martin J. Bligh" <Martin.Bligh@us.ibm.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
Matt Dobson <colpatch@us.ibm.com>
Subject: Re: [PATCH] NUMA-Q disable irqbalance
Date: Mon, 26 Aug 2002 18:23:55 -0700 [thread overview]
Message-ID: <200208261823.55005.jamesclv@us.ibm.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0208241416460.22770-100000@linux-box.realnet.co.sz>
On Saturday 24 August 2002 05:19 am, Zwane Mwaikambo wrote:
> On Tue, 13 Aug 2002, Linus Torvalds wrote:
> > Well, it makes performance _so_ much better on a P4 that it's not even
> > funny. It's basically a "P4 is unusable with SMP" without it.
>
> Out of interest, does anyone have an idea of what Windows does?
>
> Zwane
I'm not allowed to report second hand rumors from the folks who assisted with
the debug of the x440 HAL, so I won't mention that they may or may not be
using clustered logical interrupts and adjusting priority with the TPR.
I can admit that I have no clue how they assign IRQs to APIC clusters, whether
randomly or if they try some load balancing scheme.
--
James Cleverdon
IBM xSeries Linux Solutions
{jamesclv(Unix, preferred), cleverdj(Notes)} at us dot ibm dot com
next prev parent reply other threads:[~2002-08-27 1:20 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-05 23:51 [PATCH] NUMA-Q disable irqbalance Martin J. Bligh
2002-08-13 16:13 ` Martin J. Bligh
2002-08-13 16:41 ` Linus Torvalds
2002-08-13 16:57 ` Alan Cox
2002-08-13 17:24 ` Martin J. Bligh
2002-08-13 17:38 ` Alan Cox
2002-08-13 17:14 ` Martin J. Bligh
2002-08-13 17:24 ` Linus Torvalds
2002-08-13 18:02 ` Martin J. Bligh
2002-08-13 18:20 ` Linus Torvalds
2002-08-13 18:58 ` Martin J. Bligh
2002-08-13 19:22 ` Linus Torvalds
2002-08-13 20:04 ` Martin J. Bligh
2002-08-13 20:22 ` Linus Torvalds
2002-08-14 5:52 ` Martin J. Bligh
2002-08-14 10:10 ` Jos Hulzink
2002-08-14 11:12 ` David Lang
2002-08-13 20:22 ` Alan Cox
2002-08-13 20:35 ` Linus Torvalds
2002-08-13 20:34 ` Alan Cox
2002-08-13 20:42 ` Martin J. Bligh
2002-08-13 21:24 ` Linus Torvalds
2002-08-13 22:29 ` Andrew Theurer
2002-08-13 23:30 ` Andrea Arcangeli
2002-08-14 21:16 ` James Cleverdon
2002-08-23 2:31 ` [PATCH] 2.5.31 Summit NUMA patch with dynamic IRQ balancing James Cleverdon
[not found] ` <20020813233007.GV14394-YO0K3UtdbwQZxi9Dt0/nrQC/G2K4zDHf@public.gmane.org>
2002-08-23 2:31 ` James Cleverdon
2002-08-20 0:49 ` [PATCH] NUMA-Q disable irqbalance Dave Hansen
2002-08-13 22:08 ` Rik van Riel
2002-08-13 22:14 ` Rik van Riel
2002-08-14 14:49 ` Linus Torvalds
2002-08-14 15:19 ` Rik van Riel
2002-08-24 12:19 ` Zwane Mwaikambo
2002-08-27 1:23 ` James Cleverdon [this message]
2002-08-27 7:46 ` Zwane Mwaikambo
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