[Xen-users] Asynchronous IO

[Priya PM <pmpriya@xxxxxxxxx>]

Hi,

 

I have installed Xen on Linux 2.6.11.10 and i am trying to do Asynchronous Direct IO on SAS drives. The application which does the asynchronous direct io on SAS drive is running on Domain 0. Actually the IOPs what i get for a 512Bytes IO size is 67, but if i do the same operation on Linux 2.6.11.10 native kernel, i get 267 IOPs.Can anyone tell me why this huge differnece? Am i missing something? In the current setup on Xen, if i do Synchronous IO, then i am getting 265 IOPs which is expected. So i am wondering why Asynchronous IO should behave this way? Is there any reason??

 

Thanks,
Priya

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