[Novalug] VirtualBox running Windows 7 on Arch lowering battery life
maxlists at maxwellspangler.com
Wed Apr 21 20:28:20 EDT 2010
On Wed, 2010-04-21 at 17:54 -0600, Maxwell Spangler wrote:
> On Wed, 2010-04-21 at 16:44 -0700, Bryan J. Smith wrote:
> > System Activity Reporter (sar) will capture all sorts of statistics.
> > There are two (2) causes ...
> > 1. If you have the dual-core ULV Pentium 1810T, you're making heavy
> > use of that 2nd core now. That could easily eat up another 5-10Whr.
> Just that one chip?
> Is there a way to disable additional cores on the fly in Linux? Seems
> like if the chip can shut down additional cores when you're not using
> them (or choose not to use them) it would save plenty. But I'd only see
> this as really useful if you didn't have to reboot and supply boot
> parameters to enable/disable this.
Perhaps someone could try:
disable second core:
echo 0 | sudo tee /sys/devices/system/cpu/cpu1/online
re-enable second core:
echo 1 | sudo tee /sys/devices/system/cpu/cpu1/online
Linux, Unix and Database Administration
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