Re: [Xen-users] Poor domU Installation Performance on AM2 3800+ X2 unser OpenSUSE 10.1

[Steve Higton <hpq8bfr.mailing.lists@xxxxxxxxxxxxx>]

Could changing the scheduling settings make any differrence to the amount of 
time the domU spends in a blocked state?

On Saturday 19 August 2006 14:56, Steve Higton wrote:
> Hi All,
>
> I'm currently installing a minimal text mode installation of OpenSUSE 10.1
> as a DomU in an OpenSUSE 10.1 host using the SUSE xen installation tool.
> However, the performance is terrible, the text mode installer has taken 2
> hours to reach the part where it partitions the disks.
>
> Hardware specs as follows:
>
> Motherboard: MSI K9N Ultra
> CPU: AM2 3800+ X2
> RAM: 1GB DDR 667 Crucial Ballistix
> HD: 300GB Seagate 7200.8
>
> I'm a little lost as to how to diagnose this problem; xm top shows the domU
> as being in the blocked state for most of the time.  I've done a quick test
> of the disc performance with hdparm -t and the result was 61MB/s and the
> domU's disc is an LVM partition on the dom0 machine so I don't think disc
> I/O is the problem.  Also, I'm running the suse installed via a VNC
> connection to the desktop of the dom0, the VNC performance is very good so
> network performance shouldn't be the bottleneck.
>
> The config file is as follows:
> disk = [ 'phy:/dev/system/vm1_suse_101,hda,w' ]
> memory = 256
> vcpus = 1
> builder = 'linux'
> kernel = '/tmp/YaST2-05512-mQaRrP/vmlinuz-2.6.16.13-4-xen'
> ramdisk = '/tmp/YaST2-05512-mQaRrP/inst-initrd'
> name = 'vm1'
> vif = [ 'mac=00:16:3e:fd:6f:61' ]
> localtime = 0
> on_poweroff = 'destroy'
> on_reboot = 'destroy'
> on_crash = 'destroy'
> extra =
> 'install=nfs://192.168.0.12/data/replaceable/OS/OpenSUSE/SL-10.1/inst-sourc
>e TERM=xterm textmode=1'
>
> Does it matter that the dom0 is running an SMP 64bit kernel but I've only
> allocated 1 VCPU to the domU?
>
> I've used this OpenSUSE installer many times on a socket A athlon XP 3000+
> many times without problem.  In fact, this email has been sent via a xen
> domU acting as my router! :-)
>
> Thanks in advance for any help.
>
> Steve.
>
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