Re: Performance overhead of get_cycles_sync

Ingo Molnar
2007-12-11T20:30:36Z

* Ingo Molnar <mingo@elte.hu> wrote:

> > Which is not on core2 which was the question about. And if it was
> > turned off it wouldn't use get_cycles_sync() at all.
>
> it is turned off on core2 too:
>
> # cat /sys/devices/system/clocksource/clocksource0/current_clocksource
> acpi_pm

but you are right that it's not turned off on all core2's, so my patch
is wrong for them.

Ingo