On 09 Nov 13, Arjan van de Ven wrote: > Hi, > > current powertop git has two new features, that at this time require kernel > patches. > > Feature 1: Detecting who is keeping the disk busy > > A spinning disk takes between 0.5W and 1W of power,and on laptops the BIOS > will have configured an > appropriate timeout into the disk to spin down[*]. So the trick is to keep > the disk idle, which > in turn means catching who's writing to the disk. The powertop -git tree has > code to use the perf > system in the kernel to find the guilty processes. I guess the patch required for this is http://www.gossamer-threads.com/lists/linux/kernel/1145549#1145549
> Feature 2: Showing how busy the audio codecs are > > PowerTOP already has the feature to suggest to enable HDA audio power saving; > however we did not yet > show how effective this power saving was. With the help of a patch created by > Takashi Iwai (SuSE/Alsa team) > we now report the utilization (in terms of power saving vs active). > PowerTOP will report the utilization in "-d" mode; in addition if the > utilization is non-zero, it will also > provide a suggestion during the "normal" mode. Could you give a pointer to this patch please? > > The kernel patches needed to report these are on the way to the Linux kernel; > if there's enough demand > I'd be happy to post them to the PowerTOP mailing list separately. That would be appreciated. Thanks. Regards, Amit -- ------------------------------------------------------------------------- Amit Kucheria, Kernel Developer, Verdurent ------------------------------------------------------------------------- _______________________________________________ Power mailing list [email protected] http://www.bughost.org/mailman/listinfo/power
