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Re: [Xen-users] poor I/O performance with PV drivers and I/O emu
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| Subject: | Re: [Xen-users] poor I/O performance with PV drivers and I/O emu |
| From: | Tom Brown <xensource.com@xxxxxxxxxxxxxxxxxxx> |
| Date: | Wed, 15 Apr 2009 10:12:43 -0700 (PDT) |
| Delivery-date: | Wed, 15 Apr 2009 10:13:36 -0700 |
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On Wed, 15 Apr 2009, Riccardo Veraldi wrote: <snip> Sequential output around 4MB/s, Sequential input about 50MB/s a 12 to 1 ratio in read to write speed is probably NOT related to your drivers... drivers should have aproximately the same overhead on a read or a write. I would guess that there is something strange in your actual storage. I think you need to benchmark /dev/VolGroup00/test-1_disk from dom0 and figure out what your I/O system is capable of. -Tom _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users |
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