From: Anton Blanchard <anton@samba.org>
To: Jack Steiner <steiner@sgi.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: hot cache line due to note_interrupt()
Date: Tue, 11 Nov 2003 10:00:42 +1100 [thread overview]
Message-ID: <20031110230042.GF930@krispykreme> (raw)
In-Reply-To: <20031110215844.GC21632@sgi.com>
Hi,
> I also verified on a system simulator that the counter in
> note_interrupt() is the only line that is bounced between cpus at a HZ
> rate on an idle system.
>
> The IPI & reschedule interrupts have a similar problem but at a lower
> rate.
We havent seen this on ppc64 because our timer interrupt doesnt go via
the standard interrupt path (its a separate exception). IPIs do however
so Id expect these to be a problem for us.
Anton
next prev parent reply other threads:[~2003-11-10 23:05 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-10 21:58 hot cache line due to note_interrupt() Jack Steiner
2003-11-10 23:00 ` Anton Blanchard [this message]
2003-11-11 8:29 ` Ravikiran G Thirumalai
2003-11-11 16:25 ` Anton Blanchard
2003-11-11 19:58 ` Andrew Morton
2003-11-14 17:45 ` Jack Steiner
2003-11-14 17:57 ` Andrew Morton
2003-11-14 18:11 ` Jack Steiner
2003-11-14 18:10 ` David Mosberger
2003-11-14 18:17 ` Linus Torvalds
2003-11-15 5:18 ` Jeff Garzik
2003-11-14 19:10 ` Anton Blanchard
2003-11-14 19:28 ` Mike Fedyk
-- strict thread matches above, loose matches on Subject: below --
2003-11-10 19:08 Jack Steiner
2003-11-10 19:22 ` David Mosberger
2003-11-10 20:23 ` Jack Steiner
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