From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ingo Molnar Subject: Re: Performance overhead of get_cycles_sync Date: Tue, 11 Dec 2007 21:29:54 +0100 Message-ID: <20071211202954.GA27929@elte.hu> References: <475E8C8B.7070308@qumranet.com> <20071211133738.GA8150@elte.hu> <475E9A92.4030001@qumranet.com> <20071211142717.GA15903@elte.hu> <20071211083513.56c2a385@laptopd505.fenrus.org> <20071211170334.GA30144@elte.hu> <20071211201930.GB22397@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Andi Kleen Return-path: Content-Disposition: inline In-Reply-To: <20071211201930.GB22397-X9Un+BFzKDI@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org * Ingo Molnar 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 ------------------------------------------------------------------------- SF.Net email is sponsored by: Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php