From: Anton Blanchard <anton@samba.org>
To: Josh Triplett <josh@joshtriplett.org>
Cc: linux-kernel@vger.kernel.org,
Tim Pepper <lnxninja@linux.vnet.ibm.com>,
Paul McKenney <paulmck@linux.vnet.ibm.com>,
John Stultz <johnstul@us.ibm.com>,
Christoph Lameter <cl@linux-foundation.org>,
Jamey Sharp <jamey@minilop.net>
Subject: Re: [RFC PATCH] Turn off the tick even when not idle
Date: Thu, 3 Sep 2009 15:15:16 +1000 [thread overview]
Message-ID: <20090903051516.GA9646@kryten> (raw)
In-Reply-To: <20090901154327.GA10024@feather>
Hi Josh,
> The following patch (not for application any time soon) hacks away the
> timer interrupt even when not idle, by triggering the nohz mechanism
> even if not running the idle task.
Nice :) I tested it on a ppc64 box, and threw the graphs up here:
http://ozlabs.org/~anton/linux/osjitter/
With the patch applied, we saw only one interruption in the 10 second window
I measured.
Anton
prev parent reply other threads:[~2009-09-03 5:19 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-01 15:43 [RFC PATCH] Turn off the tick even when not idle Josh Triplett
2009-09-01 19:56 ` Christoph Lameter
2009-09-01 16:46 ` jim owens
2009-09-01 18:08 ` Josh Triplett
2009-09-01 22:35 ` Christoph Lameter
2009-09-01 20:26 ` Josh Triplett
2009-09-02 20:01 ` Pavel Machek
2009-09-02 21:30 ` Josh Triplett
2009-09-03 5:15 ` Anton Blanchard [this message]
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