[ltp] How to reduce the "Rescheduling Interrupts" wake up?
Thu, 29 Mar 2012 22:10:32 +0200
> I installed the Gentoo Linux with 3.2.12 kernel on a Thinkpad T420, and
> I used powertop to find out whatever is reducing my battery life, and I
> found out that "Rescheduling Interrupts" was always the top and often
> cost nearly 50%, I have try the methods on website , but it didn't
> make things different. Is there any method I could try to reduce the
> "Rescheduling Interrupts"? Or it is a kernel bug?
on my old X60s, the Rescheduling Interrupts were caused the by cpu
itself. i learned that i owned an to old intel cpu which has no stable tsc.
on my new X220 it looks like this:
> cat /sys/devices/system/clocksource/clocksource0/available_clocksource
tsc hpet acpi_pm
> cat /sys/devices/system/clocksource/clocksource0/current_clocksource
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