Re: RHEL 4.5 guest virtual network performace

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Thanks for the suggestion.

I tried with the netperf. I ran netserver on host and netperf on RHEL
5.5 and RHEL 4.5 guests. This are the results of 60 seconds long
tests:

RHEL 4.5 guest:
Throughput (10^6bits/sec) = 145.80

RHEL 5.5 guest:
Throughput (10^6bits/sec) = 3760.24

The results are really bad on RHEL 4.5 guest. What could be wrong?

Regards,
Alex

On Mon, Aug 16, 2010 at 9:49 PM, Dor Laor <dlaor@xxxxxxxxxx> wrote:
> On 08/16/2010 10:00 PM, Alex Rixhardson wrote:
>>
>> Hi guys,
>>
>> I have the following configuration:
>>
>> 1. host is RHEL 5.5, 64bit with KVM (version that comes out of the box
>> with RHEL 5.5)
>> 2. two guests:
>> 2a: RHEL 5.5, 32bit,
>> 2b: RHEL 4.5, 64bit
>>
>> If I run iperf between host RHEL 5.5 and guest RHEL 5.5 inside the
>> virtual network subnet I get great results (>  4Gbit/sec). But if I run
>> iperf between guest RHEL 4.5 and either of the two RHELs 5.5 I get bad
>> network performance (around 140Mbit/sec).
>
> Please try netperf, iperf known to be buggy and might consume cpu w/o real
> justification
>
>>
>> The configuration was made thru virtual-manager utility, nothing
>> special. I just added virtual network device to both guests.
>>
>> Could you guys give me some tips on what should I check?
>>
>> Regards,
>> Alex
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