From: Teo En Ming <singapore.mr.teo.en.ming@gmail.com>
To: Gordan Bobic <gordan@bobich.net>,
"xen-devel@lists.xen.org" <xen-devel@lists.xen.org>,
"Teo En Ming (Zhang Enming)" <singapore.mr.teo.en.ming@gmail.com>
Subject: Re: [Xen VGA Passthrough] Performance of AMD Radeon HD 6450 in Windows 7 HVM domU Poorer Than in Bare-Metal Windows 8.1 OS
Date: Wed, 10 Sep 2014 00:51:20 +0800 [thread overview]
Message-ID: <540F3008.60200@gmail.com> (raw)
In-Reply-To: <2158b5e0c984dca9c21885c952d09cd5@mail.shatteredsilicon.net>
On 09/09/2014 23:49, Gordan Bobic wrote:
> Did you test this on a fresh dom0 reboot, i.e. first domU boot
> after dom0 reboot?
Yes.
>
> Also, how many VCPUs do you have in the domU vs. total in the
> machine?
I have 4 VCPUs in the domU and 4 cores in the machine.
> Can you test bare metal with CPUs disabled? For example,
> if you have a quad core CPU, disable 2 cores, test bare metal.
How do I do that?
>
> Then start up Xen, limit dom0 to 2 cores, give 2 cores to domU,
> test and compare.
4 cores were automatically assigned to dom0. I gave 4 cores to domU as well.
> Also make sure you test with the same OS in
> domU and native otherwise you are not really making a meaningful
> comparison.
>
> Gordan
>
> On 2014-09-09 16:38, Teo En Ming wrote:
>> Hi,
>>
>> I have got VGA Passthrough working with AMD Radeon HD 6450.
>>
>> However, the performance of AMD Radeon HD 6450 in Windows 7 HVM domU
>> is poorer than in bare-metal Windows 8.1 operating system. Please
>> refer to the 3dmark basic edition 1.3.708 scores for AMD Radeon HD
>> 6450 in both Windows 7 HVM domU and bare-metal Windows 8.1.
>>
>> 3dmark scores for Windows 7 HVM domU:
>>
>> http://www.3dmark.com/3dm/3995208
>>
>> 3dmark scores for bare-metal Windows 8.1:
>>
>> http://www.3dmark.com/3dm/3996885
>>
>> Why is there such a great disparity in 3dmark scores for AMD Radeon HD
>> 6450 in Windows 7 HVM domU and in bare-metal Windows 8.1?
>>
>> The performance of AMD Radeon HD 6450 in Windows 7 HVM domU is not
>> even near native.
>>
>> Is it possible for developers to improve the performance of AMD Radeon
>> HD 6450 in Windows HVM virtual machines?
>>
>> Thank you very much.
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> http://lists.xen.org/xen-devel
>
--
Yours sincerely,
Teo En Ming
next prev parent reply other threads:[~2014-09-09 16:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-09 15:38 [Xen VGA Passthrough] Performance of AMD Radeon HD 6450 in Windows 7 HVM domU Poorer Than in Bare-Metal Windows 8.1 OS Teo En Ming
2014-09-09 15:49 ` Gordan Bobic
2014-09-09 16:51 ` Teo En Ming [this message]
2014-09-09 18:51 ` Gordan Bobic
2014-09-09 17:42 ` Zytaruk, Kelly
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