From: "Chris Friesen" <cfriesen@nortel.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>,
Christoph Lameter <cl@linux.com>,
linux-kernel@vger.kernel.org
Subject: Re: Scheduler regression: Too frequent timer interrupts(?)
Date: Fri, 17 Apr 2009 11:19:04 -0600 [thread overview]
Message-ID: <49E8BA08.8020908@nortel.com> (raw)
In-Reply-To: <20090417164918.GK8253@elte.hu>
Ingo Molnar wrote:
> it's even simpler than that: use a user-space loop and an alert()
> based signal-handler triggered measurement to count the number of
> loops user-space can execute, per second.
Alternately, just measure how long it takes to execute a given (large)
number of loops. This avoids the signal handler.
Chris
next prev parent reply other threads:[~2009-04-17 17:19 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-16 19:53 Scheduler regression: Too frequent timer interrupts(?) Christoph Lameter
2009-04-17 7:00 ` Peter Zijlstra
2009-04-17 13:42 ` Christoph Lameter
2009-04-17 14:16 ` Peter Zijlstra
2009-04-17 14:29 ` Christoph Lameter
2009-04-17 14:51 ` Peter Zijlstra
2009-04-17 15:04 ` Christoph Lameter
2009-04-17 15:28 ` Peter Zijlstra
2009-04-23 4:42 ` Pavel Machek
2009-04-28 21:02 ` Christoph Lameter
2009-04-28 21:23 ` Peter Zijlstra
2009-04-28 21:21 ` Christoph Lameter
2009-04-17 15:35 ` Ingo Molnar
2009-04-17 15:55 ` Christoph Lameter
2009-04-17 16:23 ` Peter Zijlstra
2009-04-17 16:33 ` Christoph Lameter
2009-04-17 16:49 ` Ingo Molnar
2009-04-17 17:19 ` Chris Friesen [this message]
2009-04-17 17:45 ` Christoph Lameter
2009-04-17 18:11 ` Peter Zijlstra
2009-04-17 18:20 ` Christoph Lameter
2009-04-17 18:58 ` Peter Zijlstra
2009-04-17 20:34 ` Christoph Lameter
2009-04-17 20:53 ` Peter Zijlstra
2009-04-17 23:24 ` Chris Friesen
2009-04-18 7:35 ` Ingo Molnar
2009-04-18 7:59 ` Andi Kleen
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