Re: Performance overhead of get_cycles_sync

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To: Arjan van de Ven <arjan@...>
Cc: <dor.laor@...>, <tglx@...>, Linux Kernel Mailing List <linux-kernel@...>, kvm-devel <kvm-devel@...>
Date: Tuesday, December 11, 2007 - 1:03 pm

* Arjan van de Ven <arjan@infradead.org> wrote:


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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Messages in current thread:
Re: Performance overhead of get_cycles_sync, Ingo Molnar, (Tue Dec 11, 10:27 am)
Re: [kvm-devel] Performance overhead of get_cycles_sync, Joerg Roedel, (Tue Dec 11, 5:26 pm)
Re: Performance overhead of get_cycles_sync, Arjan van de Ven, (Tue Dec 11, 12:35 pm)
Re: Performance overhead of get_cycles_sync, Ingo Molnar, (Tue Dec 11, 1:03 pm)
Re: Performance overhead of get_cycles_sync, Andi Kleen, (Tue Dec 11, 1:23 pm)
Re: Performance overhead of get_cycles_sync, Ingo Molnar, (Tue Dec 11, 4:19 pm)
Re: Performance overhead of get_cycles_sync, Ingo Molnar, (Tue Dec 11, 4:29 pm)
Re: Performance overhead of get_cycles_sync, Dor Laor, (Tue Dec 11, 11:03 am)