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

  • To: xen-users@xxxxxxxxxxxxxxxxxxx
  • 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:
Thanks for your answer.
I've done as you said.
Unfortunatelly no difference.
it goes worse when I increase file size or threads number.

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
 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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