Re: [Xen-users] network performance drop heavily in xen 4.0 release

[yingbin wang <yingbin.wangyb@xxxxxxxxx>]

sorry, I forgot to report the performance of xen4.0+kernel2.6.18.8.

xen4.0+kernel2.6.18.8:
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0-16.3 sec  1.79 GBytes    941 Mbits/sec

This combination can only meet some of our needs.

the reason why we didn't use 2.6.18.8:
  1. Our storage application is base on NBD, which will goto deadlock
on 2.6.18.8 when nbd-client and nbd-server are deployed on the same
server.
  2. Hard disk frequently offline

so we want to upgrade to kernel2.6.31.
we also try xen4.0+kernel2.6.31.12(gentoo-xen-kernel patch). the
performance is acceptable, but blktap2(support VHD) not work.
has anybody solve the problem in xen4.0+kernel2.6.31.13?

Cheers,
wyb

2010/4/16 Fajar A. Nugraha <fajar@xxxxxxxxx>:
> On Thu, Apr 15, 2010 at 11:28 PM, yingbin wang <yingbin.wangyb@xxxxxxxxx> 
> wrote:
>> Hi:
>>     I report a Bug !!!  We have just upgraded to
>> xen4.0+kernel2.6.31.13 recently.  however , fond that the network
>> performance drop heavily in dom0  (nearly Reduced by 2/3 vs
>> xen3.4.2+kernel2.6.18.8 ) .
>
>
> I highly suspect the new kernel is the culprit here. Try using xen 4.0
> with kernel 2.6.18.8.
>
> --
> Fajar
>

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