From: Andi Kleen <andi@firstfloor.org>
To: Wander Winkelhorst <w.winkelhorst@gmail.com>
Cc: Michael Meyer <mike65134@yahoo.de>,
Andi Kleen <andi@firstfloor.org>,
linux-kernel@vger.kernel.org
Subject: Re: performance differences: "maxcpus=1" vs. "echo 0 > /sys/devices/system/cpu/cpu1/online"
Date: Tue, 25 Mar 2008 18:57:16 +0100 [thread overview]
Message-ID: <20080325175716.GW2170@one.firstfloor.org> (raw)
In-Reply-To: <5699f8f00803251049s1823098u86b5431eadad2917@mail.gmail.com>
> What kind of CPU are you using? Some Intel CPU's do "funny stuff",
> like dynamically overclocking itself when working on a single thread,
> or using all of the 2nd level cache instead of sharing it with the
> second core.
P0 should also work fine with cpu hotplug. At least in theory.
-Andi
next prev parent reply other threads:[~2008-03-25 17:54 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-25 13:47 performance differences: "maxcpus=1" vs. "echo 0 > /sys/devices/system/cpu/cpu1/online" Michael Meyer
2008-03-25 14:08 ` Luciano Rocha
2008-03-25 16:38 ` Michael Meyer
2008-03-25 17:16 ` Andi Kleen
2008-03-25 17:23 ` Michael Meyer
2008-03-25 17:49 ` Wander Winkelhorst
2008-03-25 17:56 ` Michael Meyer
2008-03-25 17:57 ` Andi Kleen [this message]
2008-03-25 23:27 ` Len Brown
2008-03-26 7:26 ` Michael Meyer
2008-03-28 14:00 ` Pavel Machek
2008-03-28 13:59 ` Pavel Machek
2008-03-29 20:55 ` Michael Meyer
2008-03-29 21:22 ` Pavel Machek
2008-03-29 22:16 ` Michael Meyer
2008-04-02 11:31 ` Pavel Machek
2008-03-29 23:22 ` Bernd Eckenfels
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