From: mru@kth.se (Måns Rullgård)
To: cpufreq@www.linux.org.uk
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCHSET] 0/3 Dynamic cpufreq governor and updates to ACPI P-state driver
Date: Tue, 21 Oct 2003 12:57:15 +0200 [thread overview]
Message-ID: <yw1xbrsaeu44.fsf@kth.se> (raw)
In-Reply-To: 88056F38E9E48644A0F562A38C64FB60077911@scsmsx403.sc.intel.com
"Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com> writes:
> Most of the latest CPUs (laptop CPUs in particular) have feature
> which enable very low latency P-state transitions
> (like Enhanced Speedstep Technology-EST). Using this feature,
> we can have a lightweight in kernel cpufreq governor,
> to vary CPU frequency depending on the CPU usage. The
> advantage being low power consumption and also cooler laptops.
So, I took this thing for a spin, but it didn't work at all. I loaded
the module, and did "echo demandbased > /sys/.../scaling_governor".
This echo never returned, and the keyboard locked up. After a little
while, the fan started running at full speed. I managed to cut and
paste into an xterm and start top, which showed nothing unusual. I
could shut down and reboot normally.
--
Måns Rullgård
mru@kth.se
next prev parent reply other threads:[~2003-10-21 10:57 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-21 2:56 [PATCHSET] 0/3 Dynamic cpufreq governor and updates to ACPI P-state driver Pallipadi, Venkatesh
2003-10-21 8:25 ` Måns Rullgård
2003-10-21 20:47 ` Dominik Brodowski
2003-10-21 10:57 ` Måns Rullgård [this message]
2003-10-21 11:09 ` Måns Rullgård
2003-10-21 20:30 ` Alexander Bokovoy
2003-10-21 20:39 ` Måns Rullgård
2003-10-21 21:11 ` Alexander Bokovoy
2003-10-21 21:37 ` Måns Rullgård
2003-10-21 21:53 ` Alexander Bokovoy
2003-10-21 22:27 ` Måns Rullgård
-- strict thread matches above, loose matches on Subject: below --
2003-10-22 1:42 Pallipadi, Venkatesh
2003-10-22 1:48 Pallipadi, Venkatesh
2003-10-22 18:21 Pallipadi, Venkatesh
2003-10-23 8:19 ` Arjan van de Ven
2003-10-23 8:24 ` Alexander Bokovoy
2003-10-23 8:29 ` Arjan van de Ven
2003-10-23 18:03 ` Ducrot Bruno
2003-10-23 18:16 ` Todd Poynor
2003-10-23 18:26 ` Todd Poynor
2003-11-02 20:28 ` Jan Rychter
2003-11-04 3:14 Brown, Len
2003-11-04 3:21 ` Jan Rychter
2003-11-04 7:16 ` Dominik Brodowski
2003-11-05 21:12 Mukesh Rajan
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