Re: [Xen-devel] 4.1.2 very slow without upstream patches, but fast with them, also 4.2 very slow

[Peter Maloney <peter.maloney@xxxxxxxxxxxxxxxxxxxx>]

On 10/05/2012 10:19 PM, Peter Maloney wrote:
> On 10/04/2012 04:25 PM, Konrad Rzeszutek Wilk wrote:
>> On Wed, Oct 03, 2012 at 10:05:24PM +0200, Peter Maloney wrote:
>>> I also tested:
>>> modprobe xen-acpi-processor
>> You didn't say what kind of CPU you have. Nor if you compiled
>> your kernel or if you used a distros' kernel.
>>
>> One thing (just to eliminate this being a power management issue),
>> is to do this on the Linux command line:
>>
>> xen-acpi-processor.off=1
>>
>> It would also help if you provided the .config you are using. There
>> are some options you should not have one (like XEN_DEBUGFS.. something).
>>
> AMD FX-8150
> 990 FX chipset
> I compiled the for-linus branch of cmason's linux-btrfs git repo (
> git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs.git
> for-linus )
>
> Here's some hardware info: http://pastebin.com/XUZjmiVz
> Here's the kernel config: http://pastebin.com/1GQbiFZE (only weird thing
> I set was CONFIG_NR_CPUS=16 for no particular reason; default was 512 or
> 256)
>
>
> 3d stuff works fine (other than no es1370 sound device support) and fast
> in windows8 preview also, without that 0fps 'warmup' / 'hicup' thing
> happening (apparently as new textures are loading), which I wrote about
> before in IRC but not in the mailing list.
>
> At some point I plan on also testing:
> - builds between 4.1 and xen 4.2 to find where the 32 bit windowsxp
> starts going slow
> - a 64 bit windows xp if I can find one... I don't have one at the moment
> - a 32 bit windows 8 preview (I assume I can just download this like 64
> bit win8 preview)
32 bit Windows 8 preview is fast... so then it's only Windows xp that is
slow so far. And es1370 sound also works in 32 bit win8.


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