Bug#614256: Add workaround for slow transitioning CPUs

2011-03-07 Thread Fabien C.
Hello, This bug has been reported on the kernel bugtracker : https://bugzilla.kernel.org/show_bug.cgi?id=30712 Fabien -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org

Bug#614256: Add workaround for slow transitioning CPUs

2011-02-22 Thread Mattia Dongili
On Tue, Feb 22, 2011 at 12:49:42AM +0100, Fabien C. wrote: > > > No, I meant that those numbers were really a power saving failure :) > > Why? because the ondemand governor not keeping up with "demand" doesn't sound like a big success to me. cheers -- mattia :wq! -- To UNSUBSCRIBE, email t

Bug#614256: Add workaround for slow transitioning CPUs

2011-02-21 Thread Fabien C.
> No, I meant that those numbers were really a power saving failure :) Why? > Alright, let me add something like that (I may rename vaariables) on the > next upload. No problem :) -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble?

Bug#614256: Add workaround for slow transitioning CPUs

2011-02-21 Thread Mattia Dongili
On Mon, Feb 21, 2011 at 07:06:35PM +0100, Fabien C. wrote: ... > >> Here are my results in GB/s (several averages) for the AMD CPU: > ... > > but this looks really awful in terms of powersaving. > > Why? Because sampling often is power consuming? No, I meant that those numbers were really a power

Bug#614256: Add workaround for slow transitioning CPUs

2011-02-21 Thread Fabien C.
>> Here is the bad guy: >> >> AMD Athlon(tm) 64 X2 Dual Core Processor 4200+ >> Down freq: 1000MHz / Up freq: 2200MHz >> >> /sys/devices/system/cpu/cpufreq/ondemand/sampling_rate:109000 >> /sys/devices/system/cpu/cpufreq/ondemand/sampling_rate_min:10900 >> /sys/devices/system/cpu/cpu0/cpufreq/cpui

Bug#614256: Add workaround for slow transitioning CPUs

2011-02-21 Thread Mattia Dongili
On Sun, Feb 20, 2011 at 06:35:53PM +0100, Fabien C. wrote: > Package: cpufrequtils > Version: 007-1 > Severity: wishlist > Tags: patch > > Hello, > > Some CPUs (particularly from AMD) have a very high latency for frequency > changes. This is visible at the user level and can lead the user to chan

Bug#614256: Add workaround for slow transitioning CPUs

2011-02-20 Thread Fabien C.
Package: cpufrequtils Version: 007-1 Severity: wishlist Tags: patch Hello, Some CPUs (particularly from AMD) have a very high latency for frequency changes. This is visible at the user level and can lead the user to change it's cpufreq governor to performance, thus wasting energy. This is partic