http://bugzilla.novell.com/show_bug.cgi?id=522926 Summary: Poor Windows PV disk performance, especially on Windows 2008 Classification: openSUSE Product: openSUSE 11.1 Version: Final Platform: x86-64 OS/Version: SLES 11 Status: NEW Severity: Major Priority: P5 - None Component: Xen AssignedTo: jdouglas@novell.com ReportedBy: zhiteng.huang@intel.com QAContact: qa@suse.de Found By: --- Created an attachment (id=305738) --> (http://bugzilla.novell.com/attachment.cgi?id=305738) PV Disk performance comparison with Windows VM & RHEL VM. User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.12) Gecko/2009070611 Firefox/3.0.12 We installed WMDP_1.5_05 on Windows 2003 & Windows 2008 and used 'IOMeter' to test PV disk performance. In most cases less than 10% of native performance. That's way too low even compared with Linux guest with PV driver (RHEL VM with PV driver can get >35% of native perforamnce. Reproducible: Always Steps to Reproduce: 1. Setup a Windows 2003 and Windows 2008 VM. Install latest VMDP on VMs. 2. Configure a extra HDD for VM. The powerful HDD the better. In our setup, we used disk bay with 12 SAS RAID0. 3. Run IOmeter inside VM with 512k request size, sequential read to test disk bandwidth; and with 8k request size, random read to test IOPS. Actual Results: Windows 2003 VM bandwidth is < 250MB/s, IOPS < 220. Windows 2008 VM bandwidth is < 120MB/s, IOPS < 50. Expected Results: Native test showed the disk bay we used in our setup has 1,600MB/s bandwidth and ~6,000 IOPS. RHEL VM with VMDP had ~1,000MB/s bandwidth and ~2,300 IOPS. -- Configure bugmail: http://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.