Re: [Xen-users] Slow IO Performance

[Tomas Florian <tflorian@xxxxxxxxx>]

Thank you so much Adam ....

I have recompiled the kernel with the chipset specific support and it
works great now.  (getting 30 - 35 MB/s like I should be)

For anyone who is wondering what I did exactly:
- used lspci to find out my exact IDE chipset
- edited my kernel config file to include
CONFIG_BLK_DEV_SIS5513 = yes
CONFIG_BLK_DEV_VIA82CXXX = yes

Of course your's will depend on your chipset.  I also ended up upgrading
to Xen 3 (why not, if I'm already doing all this work) ... but I doubt
that had anything to do with resolving this problem.

Tomas


Adam Wendt wrote:
> On Fri, 13 Jan 2006 21:14 , Tomas Florian <tflorian@xxxxxxxxx> sent:
>
>   
> > Hello,
> >
> > I'm having trouble with slow IO performance under Xen 2.0.7 with 2.6 
> > kernel.  I'm running 3 physical machine.  I did hdparm -tT in my Dom0 on 
> > both servers and this is what I get:
> >     
> <snip>
>
> I would check to make sure your kernels have the right ide drivers builtin or as
> modules, i've seen this type of performance on a few machines and the fix was to
> double check the kernel config.
>
> Adam Wendt
> IPCoast, Inc.
>
>
>
>
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> Xen-users@xxxxxxxxxxxxxxxxxxx
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>
>   



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