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Open Source and information security mailing list archives
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Date: Tue, 21 Oct 2008 14:41:56 -0700 From: Alok Kataria <akataria@...are.com> To: Andi Kleen <andi@...stfloor.org> Cc: "H. Peter Anvin" <hpa@...or.com>, LKML <linux-kernel@...r.kernel.org>, the arch/x86 maintainers <x86@...nel.org>, Daniel Hecht <dhecht@...are.com> Subject: Re: [PATCH 0/3] Improve TSC as a clocksource under VMware On Tue, 2008-10-21 at 12:47 -0700, Alok Kataria wrote: > On Tue, 2008-10-21 at 12:27 -0700, Andi Kleen wrote: > > On Tue, Oct 21, 2008 at 12:10:36PM -0700, Alok Kataria wrote: > > > On Tue, 2008-10-21 at 11:15 -0700, Andi Kleen wrote: > > When the margin changes then it likely won't be good enough for > > gettimeofday(). There are a couple of testers for monotonity around, > > would such a system with shifting marging surive running them > > for a few days? > > I meant, the margin changes when you are running different flavors of > the build, or running different user configurations (from overcommitment > POV). Once a system is booted the margin won't vary, apart from the > bootup stage which will always have some extreme states. In all our > internal testing that has been done, > we have never noticed time drift is > withing the NTP threshold when its compared to the host system, under > varying load. > oops... i meant the time drift is _always_ within the NTP threshold. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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