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Re: [Xen-users] GPLPV network performance


  • From: "Fajar A. Nugraha" <fajar@xxxxxxxxx>
  • Date: Mon, 19 Jan 2009 09:42:29 +0700
  • Cc: xen-users <xen-users@xxxxxxxxxxxxxxxxxxx>
  • Delivery-date: Sun, 18 Jan 2009 18:43:26 -0800
  • List-id: Xen user discussion <xen-users.lists.xensource.com>

James Harper wrote:
>> Is it safe to assume that, for now, Standard PC HAL will
>> give better network performance compared to ACPI HAL when used with
>> GPLPV? 
>>
>>     
>
> That is a good question, but I don't know the answer. I get great
> performance (>2Gbits/second) on my system without much effort at all,
> even with SMP. My system is AMD though... maybe there is some difference
> there?
>
>   

I'm using Intel on RHEL 5.2, bundled Xen. Maybe that's what causing it.


> With 1 cpu and ACPI, what was your performance like? (eg was it SMP
> slowing you down or ACPI?)
>
>   
The thing is I can't. Note easily, anyway. I wrote in another thread
(GPLPV drivers problem), changing "vcpus=1" on the SMP domU crashed it.
Changing to HAL=halaacpi doesn't help either.

> I would be grateful if you could do a bit more testing here as this is a
> recurring problem...
>
>   
I guess I could try installing a fresh 1-CPU system. This might take
several hours though. Thanks for your help.

Regards,

Fajar

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