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[Xen-users] Difference performances between HVM and PV guest in hard dis
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| Subject: | [Xen-users] Difference performances between HVM and PV guest in hard disc reading |
| From: | helicoterus-elih@xxxxxxxx |
| Date: | Sun, 24 May 2009 12:25:40 +0000 (GMT) |
| Delivery-date: | Sun, 24 May 2009 05:26:18 -0700 |
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I perform some tests to get hard disc performance differences between HVM domU and a paravirtualized one (both Debian Lenny). I used hdparm ( option -t and -T) to test cache of disc and disc sequential read. Syntax is: hdparm -t|-T /dev/hda1 hdparm -t for hvm returns about 30 MB/sec, wheras hdparm -t for PV return about 180 MB/sec. hdparm -T for hvm returns about 1247 MB/sec, wheras hdparm -T for PV return about 1183 MB/sec. Are this test true? What about this differences? Why are hard disc performances so different? Thanks _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users |
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