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RE: [Xen-users] HVM Cpu performance 3.2

To: <oliver@xxxxxxx>
Subject: RE: [Xen-users] HVM Cpu performance 3.2
From: "Nick Couchman" <Nick.Couchman@xxxxxxxxx>
Date: Tue, 09 Dec 2008 15:44:12 -0700
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Here's my working configuration:
1) Intel Xeon E5335
2) SLES 10 SP2 64-bit (
3) Xen 3.2.0 (build included with SLES10 SP2)
4) 32-bit Windows HVM using APIC HALs

I have ~15 Windows HVM domUs running with absolutely no performance issues, plus several PV domUs.


-----Original Message-----
From: Oliver Wilcock <oliver@xxxxxxx>
To: Xen-users@xxxxxxxxxxxxxxxxxxx
Subject: RE: [Xen-users] HVM Cpu performance 3.2
Date: Tue, 9 Dec 2008 14:50:37 -0500 (EST)

So far we have:
2. kernel 2.6.16?  32 or 64 bit
3. Xen 3.2
4. guest is 32 bit Windows HVM using ACPI HAL or APIC HAL.

Result: unusable performance for Windows HVM.

Anyone out there using the above combination without problems?

> Ours is
> 1. AMD CPU
> 2. 32 Bit Hypervisor
> 3. Debian Etch Dom 0
> 4. Xen 3.2
> 5. guest is 32 bit Windows HVM using ACPI
> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Oliver
> Wilcock
> Sent: 09 December 2008 14:07
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: RE: [Xen-users] HVM Cpu performance 3.2
>> Yes thats correct.
>> The windows dom Us are using between 30-80% usage in xm top and the
> host
>> itself is running slow.
>> Ill have a look at your recommend searches
>> Thanks for your help
>> Ian
> Excellent, another person with what might be the same problem.
> I would like to know what the minimum set of common factors are.  I'm
> starting with this list:
> 1. AMD CPU
> 2. 64 bit hypervisor / Dom0?  SLES10 SP2, for me.
> 3. Xen 3.2
> 4. guest is 32 bit Windows HVM using ACPI HAL or APIC HAL.

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