Messages in this thread |  | | | Date | Tue, 11 Dec 2007 21:19:30 +0100 | | From | Ingo Molnar <> | | Subject | Re: Performance overhead of get_cycles_sync | |
* Andi Kleen <ak@suse.de> wrote:
> Ingo Molnar <mingo-X9Un+BFzKDI@public.gmane.org> writes:
>
> > the TSC clocksource (and hence the vsyscall code) is turned off on
> > systems that fail the TOD/CLOCK portion of this test:
>
> 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
Ingo
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