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Re: [Xen-users] Network and processing performances
- To: jim burns <jim_burn@xxxxxxxxxxxxx>
- From: Andreï V. Fomitchev <fomitchev@xxxxxxxx>
- Date: Wed, 4 Jun 2008 00:13:50 -0700 (PDT)
- Cc: xen-users@xxxxxxxxxxxxxxxxxxx
- Delivery-date: Wed, 04 Jun 2008 00:14:23 -0700
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Hi,
Thank you Jim for your response. Yes, I use the VBD.
Best regards,
--- En date de : Mer 4.6.08, jim burns <jim_burn@xxxxxxxxxxxxx> a écrit :
De: jim burns <jim_burn@xxxxxxxxxxxxx>
Objet: Re: [Xen-users] Network and processing performances
À: fomitchev@xxxxxxxx
Date: Mercredi 4 Juin 2008, 4h33
On Tuesday June 03 2008 08:36:28 am Andreï V. Fomitchev wrote:
> 2) global DomX performances
> Using lmbench and phoronix benchmark suites, I noted that sometimes the
> DomU performances are better that Dom0. For example, Lame compression:
146s
>
for DomU and 151s for Dom0
> GZip compression: 134.50s for DomU and 350.29s for Dom0(!!!), i.e. DomU is
> 160% faster that Dom0 LMBench pipe bandwidth communication: 1186 MBytes/s
> for DomU and 415 MBytes/s for Dom0. I does not understand the observed
> behaviours. Please, someone can explain me the differences?
If you are using file backed vbds (using file: in your config's disk=
line),
you may be seeing effects of dom0 caching your image. |
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