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Re: [Xen-devel] File System Performance - 10x slower


  • To: Jan Kundrát <jan.kundrat@xxxxxx>
  • From: Nauzad Sadry <nauzad@xxxxxxxxx>
  • Date: Sat, 15 Jan 2005 15:24:12 -0800
  • Cc: Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx>, Steven Hand <Steven.Hand@xxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxxx
  • Delivery-date: Sat, 15 Jan 2005 23:25:39 +0000
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Hello folks

On turning DMA on in XEN kernel I managed to achieve file i/o
performance comparable to baseline

Thanks for your help

Nauzad


On Tue, 11 Jan 2005 23:15:55 +0100, Jan Kundrát <jan.kundrat@xxxxxx> wrote:
> Nauzad Sadry wrote:
> > On using hdparm is found out that DMA is disabled by default in Xen
> > (it was enabled on baseline) & I probably need to rebulid the kernel
> > with this option turned on.
> >
> > If there are any other ways to turn on this option, please let me know
> 
> as Ian already said, you'll have to include your IDE chipset's driver
> into kernel. It is located under Device drivers->ATA/ATAPI/MFM/RLL support.
> 
> -jkt
> 
> --
> cd /local/pub && more beer > /dev/mouth
> 
>


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