[wellylug] ubuntu load average

Sam Vilain sam at vilain.net
Thu Jan 22 12:51:08 NZDT 2009


Daniel Pittman wrote:
>> and this:
>> https://lists.ubuntu.com/archives/ubuntu-devel/2006-November/022738.html
>>     
> Why does programming the RTC to < 1000 interrupts per second save power?
>   

The idle thread issues a particular instruction that causes the CPU to
use less power. AIUI the longer it can stay in this mode each time, the
greater power saving possible. So CONFIG_NO_HZ can save a lot of power -
hence programs like powertop and the dynticks infrastructure in the
first place.

Sam.



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