From: Arjan van de Ven <arjan@infradead.org>
To: Thomas Tuttle <thinkinginbinary@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Re: The ondemand CPUFreq code -- I hope the functionality stays
Date: Fri, 28 Jul 2006 11:24:04 +0200 [thread overview]
Message-ID: <1154078644.3117.17.camel@laptopd505.fenrus.org> (raw)
In-Reply-To: <20060728024334.GA12142@phoenix>
> Personally, I prefer conservative, because it isn't as "jumpy", but I
> can see ondemand being necessary in a server environment where the
> several second lag time to peak performance would hurt response time
> when load is low.
jumpy is fine though; at least on the processors my employer makes
changing frequency is really really fast, so you get maximum savings by
switching often (you can switch down more aggressively if you know
you'll switch back up quickly). So switching often is a good policy if
you want both good response AND good power savings...
I don't know about other cpu makers; my frequency switching machines are
all Intel.
--
if you want to mail me at work (you don't), use arjan (at) linux.intel.com
prev parent reply other threads:[~2006-07-28 9:24 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-27 8:54 Miles Lane
2006-07-27 10:12 ` Arjan van de Ven
2006-07-28 1:04 ` Patrick McFarland
2006-07-28 1:10 ` Dave Jones
2006-07-28 1:25 ` Patrick McFarland
2006-07-28 10:38 ` Miles Lane
2006-07-28 2:43 ` Thomas Tuttle
2006-07-28 9:24 ` Arjan van de Ven [this message]
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