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[Xen-devel] Bad read performance

  • To: xen-devel@xxxxxxxxxxxxxxxxxxxxx
  • From: Pradheep K E <pradheep.ke@xxxxxxxxx>
  • Date: Sat, 26 Feb 2005 01:00:23 -0600
  • Delivery-date: Sat, 26 Feb 2005 07:03:09 +0000
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  • List-id: List for Xen developers <xen-devel.lists.sourceforge.net>


I notice that domain 0 gives bad performance with disk I/O. Domain 0
was given about 55MB RAM. With the same configuration, Linux on raw
hardware gives far better performance. While a raw Linux OS gives a
disk read throughput of around 20MB/sec (without any caching effects),
dom0 (using the Xen.2.0.4 kernel with linux kernel 2.6.10) gives only
about 2-3MB/sec throughput.

Any pointers to the reasons for this difference will be greatly helpful. 


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