[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] poor I/O performance on domU
On Thu, 2005-01-13 at 10:06, Jan Kundrát wrote: > ttylinux's rootfs is exported from ext3 fs via loopback device, could it > be the cause of troubles? I think that's a reasonable answer. It should be easy to test though. Try your same test on dom0 and use /dev/loopN where N is the loopback device that has your rootfs on it. The difference between testing /dev/loopN access on dom0 and the virtual block device on domU should tell you the Xen-imposed performance penalty. I did a quick test on my system and there was a 50% slowdown using the loopback device doing your test so I imagine it's that. Regards, > -jkt -- Anthony Liguori Samba, Linux/Windows Interoperability Linux Technology Center (LTC) - IBM Austin E-mail: aliguori@xxxxxxxxxx Phone: (512) 838-1208 Tie Line: 678-1208 ------------------------------------------------------- The SF.Net email is sponsored by: Beat the post-holiday blues Get a FREE limited edition SourceForge.net t-shirt from ThinkGeek. It's fun and FREE -- well, almost....http://www.thinkgeek.com/sfshirt _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/xen-devel
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