From: Ingo Molnar <mingo-X9Un+BFzKDI@public.gmane.org>
To: Andi Kleen <ak-l3A5Bk7waGM@public.gmane.org>
Cc: kvm-devel
<kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: Performance overhead of get_cycles_sync
Date: Tue, 11 Dec 2007 21:29:54 +0100 [thread overview]
Message-ID: <20071211202954.GA27929@elte.hu> (raw)
In-Reply-To: <20071211201930.GB22397-X9Un+BFzKDI@public.gmane.org>
* Ingo Molnar <mingo-X9Un+BFzKDI@public.gmane.org> 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
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next prev parent reply other threads:[~2007-12-11 20:29 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-11 13:11 Performance overhead of get_cycles_sync Dor Laor
2007-12-11 13:37 ` Ingo Molnar
[not found] ` <20071211133738.GA8150-X9Un+BFzKDI@public.gmane.org>
2007-12-11 14:11 ` Dor Laor
[not found] ` <475E9A92.4030001-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-12-11 14:27 ` Ingo Molnar
[not found] ` <20071211142717.GA15903-X9Un+BFzKDI@public.gmane.org>
2007-12-11 15:03 ` Dor Laor
2007-12-11 21:26 ` Joerg Roedel
[not found] ` <20071211212628.GB6537-5C7GfCeVMHo@public.gmane.org>
2007-12-12 0:19 ` Dor Laor
2007-12-11 16:35 ` Arjan van de Ven
[not found] ` <20071211083513.56c2a385-NIQFrBLA1CpScpXdPBN83iCwEArCW2h5@public.gmane.org>
2007-12-11 17:03 ` Ingo Molnar
[not found] ` <p73abohno0u.fsf@bingen.suse.de>
[not found] ` <20071211201930.GB22397@elte.hu>
[not found] ` <20071211201930.GB22397-X9Un+BFzKDI@public.gmane.org>
2007-12-11 20:29 ` Ingo Molnar [this message]
2007-12-11 14:14 ` Dor Laor
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