Messages in this thread | | | Date | Tue, 19 Oct 2004 07:06:17 +0200 | From | Willy Tarreau <> | Subject | Re: [PATCH] cpufreq_ondemand |
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Hi,
On Mon, Oct 18, 2004 at 09:39:05AM +0100, Alexander Clouter wrote: > I'm all for "this really should be done in userspace", but for something like > this I have a nagging feeling that its neater in kernel-space. Of course the > userspace one has the advantage (I think cpufreqd does it) that you can > decide if you want to increase the freq depending on what applications are > running.
Well, I've used a very simple daemon I wrote for more than a year now on a vaio, and considering that I sometimes wanted to change it or even stop it, I clearly prefer it in userspace than in kernel. It was so convenient to issue a "killall cpufrqd" whenever I wanted 'time' to return accurate values on a particular process, that I cannot imagine what it would have been if it had been in the kernel. Moreover, the vaio was unreliable with certain intermediate frequencies, and it too me a lot of time to discover this (burnBX was the only reliable trigger). I simply had to change a few lines in my daemon to use different frequencies and that was all.
Cheers, Willy
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