| To: | "Priya PM" <pmpriya@xxxxxxxxx>, <Xen-users@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | RE: [Xen-users] Asynchronous IO |
| From: | "Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx> |
| Date: | Thu, 8 Sep 2005 10:17:07 +0100 |
| Cc: | ian.pratt@xxxxxxxxxxxx |
| Delivery-date: | 2005年9月08日 09:15:06 +0000 |
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| Thread-topic: | [Xen-users] Asynchronous IO |
> 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?? That's odd. You might want to try the -unstable tree. I know Andy has used AIO just fine on -unstable. Ian _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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