Re: [Xen-users] DomU slower with smp?

To:	xen-users@xxxxxxxxxxxxxxxxxxx
Subject:	Re: [Xen-users] DomU slower with smp?
From:	"Janusz Ulanowski" <janul666@xxxxxxxxx>
Date:	Thu, 15 May 2008 01:34:00 +0100
Delivery-date:	Wed, 14 May 2008 17:34:32 -0700
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2008/5/15 Nick Anderson <nick@xxxxxxxxxxxx>:

Janusz Ulanowski wrote:

Hi,
Thanks for your answer.
I've done as you said.
Unfortunatelly no difference.
it goes worse when I increase file size or threads number.

for:
time iozone -t 40 -r 2m -s 100m -m -R
DomU with four cpus (each from different core)
real 6m19.300s
DomU with one cpu
real 3m32.651s
Dom0
real 2m37.418s

Did you try a process that was less io intensive? It would be worthwhile
to see if the bottleneck is cpu or io.

what's the best way ? vmstat, iostat or something else.?

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Re: [Xen-users] DomU slower with smp?