Re: Performance overhead of get_cycles_sync

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



* Arjan van de Ven <[email protected]> wrote:

> > * Dor Laor <[email protected]> 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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux