Re: [Xen-users] HDD-performance on HVM winxp

["Brian Stempin" <brian.stempin@xxxxxxxxx>]

I hear that the network performance under HVM Windows is quite poor without the drivers.  Perhaps you're having network throughput problems in your VM?

On Mon, Apr 28, 2008 at 5:42 PM, Brian Stempin <brian.stempin@xxxxxxxxx> wrote:

I hear that the network throughput sucks if you don't use the GPL Drivers.  Perhaps you're VM is having network throughput problems?

On Mon, Apr 28, 2008 at 4:21 PM, Alexander Junghans <xen@xxxxxxxxxxxxx> wrote:

Hi,

Iometer have been installed from http://www.iometer.org/ under XP.
Transfer request size to 1MB and 128k and measured.

1MB:
Read: 35MB/s
Write: 10MB/s

128k:
Read: 21MB/s
Write: 7,5MB7s

I think that there is a problem with your setup.
My setup uses a LVM Volume on Software Raid1 on
two SATA Drives.

XEN 3.2.1build from Source.

But I have a problem with the load in dom0, when
XP ist idle.

The CPU in Xentop is nearly 100% all the time, in
the xp dom.

What is your cpu level of the HVM Domain.

Thanks.
Alexander Junghans


Daniel Schwager schrieb:

Hi together,

i'm running a winxp hvm-domain without the GPLPV-driver.

I imported an iscsi-target as a lun for the winxp-domain and
run an iometer test directly on the winxp-domain:

       Blocksize       type    MB/sec
       ------------------------------
       1 MB            read    25 MB
       1 MB            write   0.8 MB
       128 kb  read    25 MB
       128 kb  write   0.8 MB

If I run the same test on the xen-domain0 (hostsystem)using iometer's
dynamo, I got
       Blocksize       type    MB/sec
       ------------------------------
       1 MB            read    66 MB
       1 MB            write   55 MB

My problem ist the 0.8MB/sec in the winxp-domain...
Is there a way to track down the performance issue ?

[root@xen04 /var/log/xen]$ rpm -qa | grep xen
kernel-xen-devel-2.6.21-2957.fc8
kernel-xen-devel-2.6.21.7-3.fc8
xen-libs-3.1.2-2.fc8
kernel-xen-2.6.21.7-3.fc8
xen-3.1.2-2.fc8
xen-libs-3.1.2-2.fc8
kernel-xen-2.6.21-2957.fc8
kernel-xen-2.6-doc-2.6.21.7-3.fc8

[root@xen04 /var/log/xen]$ uname -a
Linux xen04.test 2.6.21-2957.fc8xen #1 SMP Tue Feb 12 13:07:27 EST 2008
x86_64 x86_64 x86_64 GNU/Linux


regards
Danny


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