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Re: [Xen-devel] Re: [PATCH 3/5] x86/pvclock: add vsyscall implementation

To: Glauber Costa <glommer@xxxxxxxxxx>
Subject: Re: [Xen-devel] Re: [PATCH 3/5] x86/pvclock: add vsyscall implementation
From: Avi Kivity <avi@xxxxxxxxxx>
Date: Wed, 28 Oct 2009 11:34:09 +0200
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>, kurt.hackel@xxxxxxxxxx, the arch/x86 maintainers <x86@xxxxxxxxxx>, Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>, zach.brown@xxxxxxxxxx, Glauber de Oliveira Costa <gcosta@xxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, chris.mason@xxxxxxxxxx
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On 10/28/2009 11:29 AM, Glauber Costa wrote:
How can you reliably measure performance in a virtualized environment?
If we loop gettimeofday(), I would expect the vsyscall-based version not to show
up in strace, right?

Much better to have an API for this.  Life is hacky enough already.

--
error compiling committee.c: too many arguments to function


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