From: Chuck Ebbert <cebbert@redhat.com>
To: Arjan van de Ven <arjan@linux.intel.com>
Cc: "Andrew Morton" <akpm@linux-foundation.org>,
"Anders Boström" <anders@bostrom.dyndns.org>,
linux-kernel@vger.kernel.org, torvalds@linux-foundation.org
Subject: Re: PROBLEM: high load average when idle
Date: Wed, 03 Oct 2007 13:32:02 -0400 [thread overview]
Message-ID: <4703D212.6040304@redhat.com> (raw)
In-Reply-To: <20071002162613.54c3ef43@laptopd505.fenrus.org>
On 10/02/2007 07:26 PM, Arjan van de Ven wrote:
> On Tue, 02 Oct 2007 18:33:58 -0400
>> Or, everybody wakes up at once right when we are taking a sample. :)
>
> nice try but we sample every timer tick; this code being timer driven
> makes it what you say it is regardless of *which* timer tick it
> happens at ;)
>
But we reduce the number of samples because some ticks just never
happen when the timers get rounded:
No rounding:
tick ............... tick
1 running 1 running
Rounded:
tick
2 running
In the first case the average is 1, but it's 2 in the second.
next prev parent reply other threads:[~2007-10-03 17:32 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-02 21:37 PROBLEM: high load average when idle Anders Boström
2007-10-02 22:07 ` Andrew Morton
2007-10-02 22:32 ` Linus Torvalds
2007-10-02 22:39 ` Arjan van de Ven
2007-10-02 22:46 ` Mark Lord
2007-10-02 23:22 ` Arjan van de Ven
2007-10-02 23:40 ` Mark Lord
2007-10-02 23:19 ` Arjan van de Ven
2007-10-02 22:33 ` Chuck Ebbert
2007-10-02 23:26 ` Arjan van de Ven
2007-10-03 17:32 ` Chuck Ebbert [this message]
2007-10-03 18:02 ` Linus Torvalds
2007-10-03 18:20 ` Arjan van de Ven
2007-10-03 18:28 ` Linus Torvalds
2007-10-03 18:29 ` Arjan van de Ven
2007-10-03 20:15 ` Anders Boström
2007-10-03 18:34 ` Anders Boström
2007-10-02 23:13 ` Arjan van de Ven
2007-10-03 7:04 ` Anders Boström
2007-10-03 9:40 ` Thorsten Kranzkowski
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