Messages in this thread | | | Date | Tue, 11 Dec 2007 18:03:34 +0100 | From | Ingo Molnar <> | Subject | Re: Performance overhead of get_cycles_sync |
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* Arjan van de Ven <arjan@infradead.org> wrote:
> > * Dor Laor <dor.laor@gmail.com> wrote: > > > > The patch below should resolve this - could you please test and Ack > > it? But this CPUID was present in v2.6.23 too, so why did it only > > show up in 2.6.24-rc for you? > > isn't this probably wrong since this code is also used in the vsyscall > code..
the TSC clocksource (and hence the vsyscall code) is turned off on systems that fail the TOD/CLOCK portion of this test:
http://people.redhat.com/mingo/time-warp-test/time-warp-test.c
i.e. on the majority of systems in place.
Ingo
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