From: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
To: kvm-ppc@vger.kernel.org
Subject: Re: [kvm-ppc-devel] little initial performance measurement
Date: Fri, 28 Mar 2008 14:58:26 +0000 [thread overview]
Message-ID: <47ED0792.7060006@linux.vnet.ibm.com> (raw)
In-Reply-To: <47ED0581.5080201@linux.vnet.ibm.com>
Christian Ehrhardt wrote:
> A little Timing check:
> sleep 30s vs. real clock 30s
> Host:
> Guest: TODO
>
I know this test is very fuzzy, but it can give a feelign if timing is broken completely or not. I have seen systems with broken timing in the past and it can affect a lot of thing in weird ways :-)
Host:
bash-3.00# time sleep 30s
real 0m30.026s
user 0m0.000s
sys 0m0.000s
real clock ~30sec
Guest:
bash-3.00# time sleep 30s
real 0m32.680s
user 0m1.556s
sys 0m1.092s
real clock ~32sec
So basic timing is ok, the 2 extra seconds are from the rest of the app around the sleep itself.
--
Grüsse / regards,
Christian Ehrhardt
IBM Linux Technology Center, Open Virtualization
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prev parent reply other threads:[~2008-03-28 14:58 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-28 14:49 [kvm-ppc-devel] little initial performance measurement Christian Ehrhardt
2008-03-28 14:58 ` Christian Ehrhardt [this message]
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