From: Vivek Haldar <vhaldar@uci.edu>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: cpufreq list <cpufreq@www.linux.org.uk>
Subject: Re: Dynamic frequency governor
Date: Fri, 17 Oct 2003 22:58:44 -0700 [thread overview]
Message-ID: <3F90D694.5020702@uci.edu> (raw)
In-Reply-To: <1066453236.7590.4.camel@ixodes.goop.org>
Jeremy Fitzhardinge wrote:
>On Fri, 2003-10-17 at 14:14, Moore, Robert wrote:
>
>
>>Hi all,
>>
>>I've been chartered to implement a multi-state algorithm for Linux;
>>this will be a new governor that adjusts the CPU frequency based upon
>>percent CPU utilization as reported from the kernel idle handler.
>>
>>Has any work been done (or is being done) in this area? I don't want to
>>rewrite the wheel.
>>
>>
>
>Speedfreq (http://www.goop.org/~jeremy/speedfreq) does this in
>userspace. I'm not sure there's much win in putting it into the kernel,
>but a better idle measurement would be nice (I use /proc/uptime, which
>can only be reliably polled a couple of times a second).
>
I have a very similar tool called LAMP -
http://gandalf.ics.uci.edu/~haldar/lamp/ . I didn't know about your
program until this post.
I agree with you that this should be in user-space, not in kernel space.
Vivek.
next prev parent reply other threads:[~2003-10-18 5:58 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-17 21:14 Dynamic frequency governor Moore, Robert
2003-10-18 5:00 ` Jeremy Fitzhardinge
2003-10-18 5:58 ` Vivek Haldar [this message]
2003-10-19 21:34 ` Jeroen van der Vegt
2003-10-18 6:44 ` David Kar-Fai Tam
2003-12-22 21:41 ` David Kar-Fai Tam
2004-02-14 17:09 ` Dominik Brodowski
2003-10-19 13:24 ` Dave Jones
2003-10-20 15:40 ` Daniel Thor Kristjansson
-- strict thread matches above, loose matches on Subject: below --
2003-10-20 15:31 Moore, Robert
2003-10-20 15:39 ` Dave Jones
2003-10-20 16:33 Moore, Robert
2003-10-20 17:00 ` Dave Jones
2003-10-20 17:12 ` Daniel Thor Kristjansson
2003-10-20 17:25 ` Ducrot Bruno
2003-10-20 17:32 ` Dave Jones
2003-10-20 17:35 ` Ducrot Bruno
2003-10-20 18:10 ` Dave Jones
2003-10-20 23:28 ` Sven Dowideit
2003-10-20 17:08 Moore, Robert
2003-10-21 20:31 ` Dave Jones
2003-10-21 22:21 ` David Kar-Fai Tam
2003-10-21 23:19 ` Dave Jones
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