RE: [Xen-ia64-devel] [PATCH] Add event callback for xen/ia64

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

>From: Alex Williamson [mailto:alex.williamson@xxxxxx]
>Sent: 2006年4月12日 2:56
>
>On Tue, 2006-04-11 at 21:59 +0800, Tian, Kevin wrote:
>> >From: Tristan Gingold [mailto:Tristan.Gingold@xxxxxxxx]
>> >* Performances ?
>>
>> There should be no obvious difference. The importance here
>> is that this patch is only an intermediate step toward final
>> solution. It makes more sense to measure performance at the
>> last step when all pirq/virq/ipi are bound to this path. Finally it
>> should be better. Also please note this is necessary feature
>> requirement to reuse common architecture and thus support
>> more advanced features easily just like Isaku's p2m effort. The
>> performance can be always tuned on top of this path gradually.
>
>Kevin,
>
>   It might be a good idea to try this with Isaku's current set of
>patches.  I saw ~10x performance decrease in network performance
>from
>domU with this patch applied (10MB/s+ to <1MB/s).  Thanks,
>
>       Alex
>

Hi, Alex,
        Could you provide something about your test environment, 
and then I can try identical steps as yours to see what's the 
bottleneck? For example:
        - dom0 memory size
        - domU memory size
        - How do you measure the network throughput?

        BTW, Isaku's patch is upon Rev 9492, and then I'll also 
measure upon that version.

Thanks,
Kevin

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