From: Pavel Machek <pavel@suse.cz>
To: Michael Meyer <mike65134@yahoo.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: performance differences: "maxcpus=1" vs. "echo 0 > /sys/devices/system/cpu/cpu1/online"
Date: Wed, 2 Apr 2008 13:31:32 +0200 [thread overview]
Message-ID: <20080402113132.GA3181@elf.ucw.cz> (raw)
In-Reply-To: <548290.15521.qm@web25803.mail.ukl.yahoo.com>
Hi!
> > Ok, and your chip is too old to have "Enhanced Dynamic Acceleration
> > Technology" (Intel, can't you use some reasonable names?!)... both
> > would explain effects you see, and it is neither...
>
> It is too old to have that. I bought it at the beginning of 2007 and it
> is from the first line of Core 2 Duo processors (released in summer
> 2006). I think "Enhanced Dynamic Acceleration Technology" is only
> available recently.
>
> > You could try implementing deep sleep (C4) state for cpu hotplug....
>
> I have to confess that I sneaked unto LKML illegitimately, as I am not
> a kernel hacker.
You can still play one, and submit a patch. Over internet, noone can
tell if you are hacker or not ;-). I would be happy to help with good
advice ;-).
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2008-04-02 11:31 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
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 [this message]
2008-03-29 23:22 ` Bernd Eckenfels
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