From: Thomas Sailer <sailer@scs.ch>
To: Russell King <rmk@arm.linux.org.uk>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: Linux 2.4.19-rc1-ac3
Date: 15 Jul 2002 12:13:40 +0200 [thread overview]
Message-ID: <1026728020.2365.23.camel@watermelon.scs.ch> (raw)
In-Reply-To: <20020713205422.E25995@flint.arm.linux.org.uk>
On Sat, 2002-07-13 at 21:54, Russell King wrote:
> You're right if your CPU usage is 100% - lowering the CPU clock rate
> means you take longer to complete the task, and with the static
> element of the CPU power consumption, you'd probably end up using
> more energy to perform the same task in a longer time.
The point is that frequency scaling is normally used with voltage
scaling. And lowering the voltage decreases the maximum frequency
roughly linearly, while the dynamic power consumption decreases
quadratically with voltage.
Tom
next prev parent reply other threads:[~2002-07-15 10:10 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-12 19:14 Alan Cox
2002-07-12 23:42 ` Peter Osterlund
2002-07-13 7:41 ` Zwane Mwaikambo
2002-07-13 10:34 ` Peter Osterlund
2002-07-13 12:38 ` Zwane Mwaikambo
2002-07-13 16:22 ` Peter Osterlund
2002-07-13 18:27 ` Alan Cox
2002-07-13 19:43 ` Peter Osterlund
2002-07-13 19:54 ` Russell King
2002-07-13 20:56 ` Peter Osterlund
2002-07-15 10:13 ` Thomas Sailer [this message]
2002-07-15 10:16 ` Russell King
2002-07-14 1:50 ` Alan Cox
[not found] ` <6010.1026651788@www53.gmx.net>
2002-07-14 13:09 ` Dominik Brodowski
2002-07-14 15:19 ` Peter Osterlund
2002-07-14 15:50 ` Dominik Brodowski
2002-07-14 18:52 ` Peter Osterlund
2002-07-13 10:25 ` Peter Osterlund
2002-07-13 14:15 ` Pavel Machek
2002-07-13 17:09 ` Alan Cox
2002-07-13 15:59 ` fchabaud
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