RE: [Xen-devel] [Patch] Buffer disk I/O requests

["Han, Weidong" <weidong.han@xxxxxxxxx>]

Buffered disk I/O improves disk I/O port access performance. It's
similar to buffered vga which is mmio. We ran SysBench random file I/O
test and found it reached about 10% improvement.

--Weidong

Keir Fraser wrote:
> What sort of improvement does it achieve? It's a pretty hacky thing
> to have to add... :-(
> 
>  -- Keir
> 
> 
> On 14/5/07 10:36, "Han, Weidong" <weidong.han@xxxxxxxxx> wrote:
> 
>> Disk I/O of VM is slow compared to native, I/O port access consumes
>> time significantly, which could be partly improved with buffered I/O.
>> The attached patch partly improves the performance of disk I/O
>> through buffering Disk I/O requests. 
>> 
>> Signed-off-by: Zhiteng Huang <zhiteng.huang@xxxxxxxxx>
>> Signed-off-by: Weidong Han <weidong.han@xxxxxxxxx>
>> 
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@xxxxxxxxxxxxxxxxxxx
>> http://lists.xensource.com/xen-devel

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel