From: Arjan van de Ven <arjan@infradead.org>
To: Andi Kleen <ak@suse.de>
Cc: Bernd Paysan <bernd.paysan@gmx.de>,
suse-amd64@suse.com, linux-kernel@vger.kernel.org
Subject: Re: [suse-amd64] False "lost ticks" on dual-Opteron system (=> timer twice as fast)
Date: Tue, 10 May 2005 15:39:49 +0200 [thread overview]
Message-ID: <1115732389.6008.28.camel@laptopd505.fenrus.org> (raw)
In-Reply-To: <20050510132153.GJ25612@wotan.suse.de>
On Tue, 2005-05-10 at 15:21 +0200, Andi Kleen wrote:
> On Tue, May 10, 2005 at 03:15:44PM +0200, Bernd Paysan wrote:
> > On Tuesday 10 May 2005 15:07, Andi Kleen wrote:
> > > That could be irqbalance doing its thing. Does it go away when
> > > you stop it?
> >
> > Yes, it seems to go away.
>
> Ok, it is fine then. A bit unexpected, but fine.
irqbalance nowadays rotates the timer interrupt every 10 seconds after
some people complained that having it always on the same cpu penalized
their HPC apps unbalanced. (they glued those tasks to each cpu). It's
not a big deal (the irq rate isn't that high) and it does make things
slightly more fair in the HPC case.
next prev parent reply other threads:[~2005-05-10 13:40 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-08 12:45 Bernd Paysan
2005-05-08 13:40 ` [suse-amd64] " Andi Kleen
2005-05-08 16:22 ` Bernd Paysan
2005-05-09 10:53 ` Bernd Paysan
2005-05-09 13:17 ` Bernd Paysan
2005-05-10 10:53 ` Ed Tomlinson
2005-05-10 13:32 ` Andi Kleen
2005-05-10 11:12 ` Andi Kleen
2005-05-10 11:36 ` Bernd Paysan
2005-05-10 11:54 ` Bernd Paysan
2005-05-10 13:07 ` Andi Kleen
2005-05-10 13:15 ` Bernd Paysan
2005-05-10 13:21 ` Andi Kleen
2005-05-10 13:39 ` Arjan van de Ven [this message]
2005-05-21 19:42 ` Hendrik Visage
2005-05-21 20:54 ` Scott Robert Ladd
[not found] ` <428F9FA6.1000800@coyotegulch.com>
[not found] ` <d93f04c70505211500216d8614@mail.gmail.com>
2005-05-23 11:50 ` Scott Robert Ladd
2005-05-23 23:04 ` Hendrik Visage
2005-05-25 17:06 ` Andi Kleen
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