On Thu, Jul 28, 2016 at 03:54:34PM -0400, Boris Ostrovsky wrote:
> On 07/28/2016 03:44 PM, Andrew Cooper wrote:
> As far as Intel vs AMD implementation in Xen, we have vmx_handle_cd()
> but no corresponding SVM code. Could it be that we need to set gPAT, for
> example?
> >>> A better
On 07/28/2016 03:44 PM, Andrew Cooper wrote:
As far as Intel vs AMD implementation in Xen, we have vmx_handle_cd()
but no corresponding SVM code. Could it be that we need to set gPAT, for
example?
>>> A better approach would be to find out why ovmf insists on disabling
>>> caches at
On 28/07/16 20:25, Boris Ostrovsky wrote:
> On 07/28/2016 11:51 AM, Andrew Cooper wrote:
>> On 28/07/16 16:17, Boris Ostrovsky wrote:
>>> On 07/28/2016 06:54 AM, Andrew Cooper wrote:
On 28/07/16 11:43, George Dunlap wrote:
> On Thu, Jul 28, 2016 at 11:18 AM, Anthony PERARD
> wrote:
>>
On 07/28/2016 11:51 AM, Andrew Cooper wrote:
> On 28/07/16 16:17, Boris Ostrovsky wrote:
>> On 07/28/2016 06:54 AM, Andrew Cooper wrote:
>>> On 28/07/16 11:43, George Dunlap wrote:
On Thu, Jul 28, 2016 at 11:18 AM, Anthony PERARD
wrote:
> On Wed, Jul 27, 2016 at 03:45:23PM -0400, Bor
On 28/07/16 16:17, Boris Ostrovsky wrote:
> On 07/28/2016 06:54 AM, Andrew Cooper wrote:
>> On 28/07/16 11:43, George Dunlap wrote:
>>> On Thu, Jul 28, 2016 at 11:18 AM, Anthony PERARD
>>> wrote:
On Wed, Jul 27, 2016 at 03:45:23PM -0400, Boris Ostrovsky wrote:
> On 07/27/2016 07:35 AM, An
On 07/28/2016 06:54 AM, Andrew Cooper wrote:
> On 28/07/16 11:43, George Dunlap wrote:
>> On Thu, Jul 28, 2016 at 11:18 AM, Anthony PERARD
>> wrote:
>>> On Wed, Jul 27, 2016 at 03:45:23PM -0400, Boris Ostrovsky wrote:
On 07/27/2016 07:35 AM, Anthony PERARD wrote:
> On Wed, Jul 27, 2016 at
On Thu, Jul 28, 2016 at 11:54:27AM +0100, Andrew Cooper wrote:
> On 28/07/16 11:43, George Dunlap wrote:
> > On Thu, Jul 28, 2016 at 11:18 AM, Anthony PERARD
> > wrote:
> >> On Wed, Jul 27, 2016 at 03:45:23PM -0400, Boris Ostrovsky wrote:
> >>> On 07/27/2016 07:35 AM, Anthony PERARD wrote:
>
On 28/07/16 11:43, George Dunlap wrote:
> On Thu, Jul 28, 2016 at 11:18 AM, Anthony PERARD
> wrote:
>> On Wed, Jul 27, 2016 at 03:45:23PM -0400, Boris Ostrovsky wrote:
>>> On 07/27/2016 07:35 AM, Anthony PERARD wrote:
On Wed, Jul 27, 2016 at 12:08:04PM +0100, Anthony PERARD wrote:
> I can
On Thu, Jul 28, 2016 at 11:18 AM, Anthony PERARD
wrote:
> On Wed, Jul 27, 2016 at 03:45:23PM -0400, Boris Ostrovsky wrote:
>> On 07/27/2016 07:35 AM, Anthony PERARD wrote:
>> > On Wed, Jul 27, 2016 at 12:08:04PM +0100, Anthony PERARD wrote:
>> >> I can try to describe how OVMF is setting up the me
On Wed, Jul 27, 2016 at 03:45:23PM -0400, Boris Ostrovsky wrote:
> On 07/27/2016 07:35 AM, Anthony PERARD wrote:
> > On Wed, Jul 27, 2016 at 12:08:04PM +0100, Anthony PERARD wrote:
> >> I can try to describe how OVMF is setting up the memory.
> > From the start of the day:
> > setup gdt
> > cr0 = 0
On 07/27/2016 07:35 AM, Anthony PERARD wrote:
> On Wed, Jul 27, 2016 at 12:08:04PM +0100, Anthony PERARD wrote:
>> I can try to describe how OVMF is setting up the memory.
> From the start of the day:
> setup gdt
> cr0 = 0x4023
I think this is slightly odd, with bit 30 (cache disable) set. I'd
On Wed, Jul 27, 2016 at 12:08:04PM +0100, Anthony PERARD wrote:
> I can try to describe how OVMF is setting up the memory.
From the start of the day:
setup gdt
cr0 = 0x4023
jump to 32bit
cr4 = 0x640
setup page tables:
page directory attributes: (PAGE_ACCESSED + PAGE_READ_WRITE + PAGE_PRESENT
On Fri, Jul 15, 2016 at 11:22:45AM -0400, Boris Ostrovsky wrote:
> On 07/15/2016 09:48 AM, Konrad Rzeszutek Wilk wrote:
> > On Thu, Jul 14, 2016 at 04:53:07PM +0100, Anthony PERARD wrote:
> >> Hi,
> >>
> >> I've been investigating why OVMF is very slow in a Xen guest on an AMD
> >> host. This, I t
On Mon, 2016-07-18 at 16:09 +0100, Anthony PERARD wrote:
>
> $ dwdiff procinfo_guest_ovmf_kvm procinfo_guest_ovmf_xen
> processor : 0
> vendor_id : AuthenticAMD
> cpu family: [-6-] {+21+}
> model : [-6-] {+1+}
> model name: [-QEMU Virtual CPU version 2.5+-] {+AMD
> Opteron(
On Fri, Jul 15, 2016 at 09:48:31AM -0400, Konrad Rzeszutek Wilk wrote:
> On Thu, Jul 14, 2016 at 04:53:07PM +0100, Anthony PERARD wrote:
> > So, this loop takes about 1 minute on my AMD machine (AMD Opteron(tm)
> > Processor 4284), and less that 1 second on an Intel machine.
> > If I compile OVMF a
On 07/15/2016 09:48 AM, Konrad Rzeszutek Wilk wrote:
> On Thu, Jul 14, 2016 at 04:53:07PM +0100, Anthony PERARD wrote:
>> Hi,
>>
>> I've been investigating why OVMF is very slow in a Xen guest on an AMD
>> host. This, I think, is the current failure that osstest is having.
>>
>> I've only look at
On Thu, Jul 14, 2016 at 04:53:07PM +0100, Anthony PERARD wrote:
> Hi,
>
> I've been investigating why OVMF is very slow in a Xen guest on an AMD
> host. This, I think, is the current failure that osstest is having.
>
> I've only look at a specific part of OVMF where the slowdown is very
> obviou
Hi,
I've been investigating why OVMF is very slow in a Xen guest on an AMD
host. This, I think, is the current failure that osstest is having.
I've only look at a specific part of OVMF where the slowdown is very
obvious on AMD vs Intel, the decompression.
This is what I get on AMD, via the Xen
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