On Sun, Apr 7, 2013 at 12:41 AM, Michael S. Tsirkin wrote:
> On Thu, Apr 04, 2013 at 04:32:01PM -0700, Christoffer Dall wrote:
>> [...]
>>
>> >> >> to give us some idea how much performance we would gain from each
>> >> >> approach? Thoughput should be completely unaffected anyway, since
>> >> >
On Sun, Apr 07, 2013 at 12:30:38PM +0300, Gleb Natapov wrote:
> On Thu, Apr 04, 2013 at 04:14:57PM +0300, Gleb Natapov wrote:
> > > >
> > > >>> is to move to MMIO only when PIO address space is exhausted. For PCI
> > > >>> it
> > > >>> will be never, for PCI-e it will be after ~16 devices.
> > >
On Thu, Apr 04, 2013 at 04:14:57PM +0300, Gleb Natapov wrote:
> > >
> > >>> is to move to MMIO only when PIO address space is exhausted. For PCI it
> > >>> will be never, for PCI-e it will be after ~16 devices.
> > >>
> > >> Ok, let's go back a step here. Are you actually able to measure any
> >
On Thu, Apr 04, 2013 at 04:32:01PM -0700, Christoffer Dall wrote:
> [...]
>
> >> >> to give us some idea how much performance we would gain from each
> >> >> approach? Thoughput should be completely unaffected anyway, since
> >> >> virtio just coalesces kicks internally.
> >> >
> >> > Latency is
[...]
>> >> to give us some idea how much performance we would gain from each
>> >> approach? Thoughput should be completely unaffected anyway, since virtio
>> >> just coalesces kicks internally.
>> >
>> > Latency is dominated by the scheduling latency.
>> > This means virtio-net is not the best
On Thu, Apr 04, 2013 at 06:36:30PM +0300, Michael S. Tsirkin wrote:
> > processor : 0
> > vendor_id : AuthenticAMD
> > cpu family : 16
> > model : 8
> > model name : Six-Core AMD Opteron(tm) Processor 8435
> > stepping: 0
> > cpu MHz : 800.000
> > cache size : 5
On Thu, Apr 04, 2013 at 05:36:40PM +0200, Alexander Graf wrote:
>
> On 04.04.2013, at 15:33, Michael S. Tsirkin wrote:
>
> > On Thu, Apr 04, 2013 at 03:06:42PM +0200, Alexander Graf wrote:
> >>
> >> On 04.04.2013, at 14:56, Gleb Natapov wrote:
> >>
> >>> On Thu, Apr 04, 2013 at 02:49:39PM +0200
On Thu, Apr 04, 2013 at 05:36:40PM +0200, Alexander Graf wrote:
> >
> > #define GOAL (1ull << 30)
> >
> >do {
> >iterations *= 2;
> >t1 = rdtsc();
> >
> >for (i = 0; i < iterations; ++i)
> >func();
>
On 04.04.2013, at 15:33, Michael S. Tsirkin wrote:
> On Thu, Apr 04, 2013 at 03:06:42PM +0200, Alexander Graf wrote:
>>
>> On 04.04.2013, at 14:56, Gleb Natapov wrote:
>>
>>> On Thu, Apr 04, 2013 at 02:49:39PM +0200, Alexander Graf wrote:
On 04.04.2013, at 14:45, Gleb Natapov wrote:
On Thu, Apr 04, 2013 at 04:14:57PM +0300, Gleb Natapov wrote:
> On Thu, Apr 04, 2013 at 03:06:42PM +0200, Alexander Graf wrote:
> >
> > On 04.04.2013, at 14:56, Gleb Natapov wrote:
> >
> > > On Thu, Apr 04, 2013 at 02:49:39PM +0200, Alexander Graf wrote:
> > >>
> > >> On 04.04.2013, at 14:45, Gl
On Thu, Apr 04, 2013 at 04:02:57PM +0200, Alexander Graf wrote:
>
> On 04.04.2013, at 14:58, Michael S. Tsirkin wrote:
>
> > On Thu, Apr 04, 2013 at 02:22:09PM +0200, Alexander Graf wrote:
> >>
> >> On 04.04.2013, at 14:08, Gleb Natapov wrote:
> >>
> >>> On Thu, Apr 04, 2013 at 01:57:34PM +0200
On Thu, Apr 04, 2013 at 03:06:42PM +0200, Alexander Graf wrote:
>
> On 04.04.2013, at 14:56, Gleb Natapov wrote:
>
> > On Thu, Apr 04, 2013 at 02:49:39PM +0200, Alexander Graf wrote:
> >>
> >> On 04.04.2013, at 14:45, Gleb Natapov wrote:
> >>
> >>> On Thu, Apr 04, 2013 at 02:39:51PM +0200, Alex
On Thu, Apr 04, 2013 at 03:56:49PM +0300, Gleb Natapov wrote:
> On Thu, Apr 04, 2013 at 02:49:39PM +0200, Alexander Graf wrote:
> >
> > On 04.04.2013, at 14:45, Gleb Natapov wrote:
> >
> > > On Thu, Apr 04, 2013 at 02:39:51PM +0200, Alexander Graf wrote:
> > >>
> > >> On 04.04.2013, at 14:38, Gl
On Thu, Apr 04, 2013 at 02:39:51PM +0200, Alexander Graf wrote:
>
> On 04.04.2013, at 14:38, Gleb Natapov wrote:
>
> > On Thu, Apr 04, 2013 at 02:32:08PM +0200, Alexander Graf wrote:
> >>
> >> On 04.04.2013, at 14:08, Gleb Natapov wrote:
> >>
> >>> On Thu, Apr 04, 2013 at 01:57:34PM +0200, Alex
On Thu, Apr 04, 2013 at 02:32:08PM +0200, Alexander Graf wrote:
>
> On 04.04.2013, at 14:08, Gleb Natapov wrote:
>
> > On Thu, Apr 04, 2013 at 01:57:34PM +0200, Alexander Graf wrote:
> >>
> >> On 04.04.2013, at 12:50, Michael S. Tsirkin wrote:
> >>
> >>> With KVM, MMIO is much slower than PIO,
On 04.04.2013, at 14:58, Michael S. Tsirkin wrote:
> On Thu, Apr 04, 2013 at 02:22:09PM +0200, Alexander Graf wrote:
>>
>> On 04.04.2013, at 14:08, Gleb Natapov wrote:
>>
>>> On Thu, Apr 04, 2013 at 01:57:34PM +0200, Alexander Graf wrote:
On 04.04.2013, at 12:50, Michael S. Tsirkin w
On Thu, Apr 04, 2013 at 02:22:09PM +0200, Alexander Graf wrote:
>
> On 04.04.2013, at 14:08, Gleb Natapov wrote:
>
> > On Thu, Apr 04, 2013 at 01:57:34PM +0200, Alexander Graf wrote:
> >>
> >> On 04.04.2013, at 12:50, Michael S. Tsirkin wrote:
> >>
> >>> With KVM, MMIO is much slower than PIO,
On Thu, Apr 04, 2013 at 03:06:42PM +0200, Alexander Graf wrote:
>
> On 04.04.2013, at 14:56, Gleb Natapov wrote:
>
> > On Thu, Apr 04, 2013 at 02:49:39PM +0200, Alexander Graf wrote:
> >>
> >> On 04.04.2013, at 14:45, Gleb Natapov wrote:
> >>
> >>> On Thu, Apr 04, 2013 at 02:39:51PM +0200, Alex
On 04.04.2013, at 14:56, Gleb Natapov wrote:
> On Thu, Apr 04, 2013 at 02:49:39PM +0200, Alexander Graf wrote:
>>
>> On 04.04.2013, at 14:45, Gleb Natapov wrote:
>>
>>> On Thu, Apr 04, 2013 at 02:39:51PM +0200, Alexander Graf wrote:
On 04.04.2013, at 14:38, Gleb Natapov wrote:
On Thu, Apr 04, 2013 at 02:49:39PM +0200, Alexander Graf wrote:
>
> On 04.04.2013, at 14:45, Gleb Natapov wrote:
>
> > On Thu, Apr 04, 2013 at 02:39:51PM +0200, Alexander Graf wrote:
> >>
> >> On 04.04.2013, at 14:38, Gleb Natapov wrote:
> >>
> >>> On Thu, Apr 04, 2013 at 02:32:08PM +0200, Alex
On 04.04.2013, at 14:45, Gleb Natapov wrote:
> On Thu, Apr 04, 2013 at 02:39:51PM +0200, Alexander Graf wrote:
>>
>> On 04.04.2013, at 14:38, Gleb Natapov wrote:
>>
>>> On Thu, Apr 04, 2013 at 02:32:08PM +0200, Alexander Graf wrote:
On 04.04.2013, at 14:08, Gleb Natapov wrote:
On Thu, Apr 04, 2013 at 02:39:51PM +0200, Alexander Graf wrote:
>
> On 04.04.2013, at 14:38, Gleb Natapov wrote:
>
> > On Thu, Apr 04, 2013 at 02:32:08PM +0200, Alexander Graf wrote:
> >>
> >> On 04.04.2013, at 14:08, Gleb Natapov wrote:
> >>
> >>> On Thu, Apr 04, 2013 at 01:57:34PM +0200, Alex
On 04.04.2013, at 14:38, Gleb Natapov wrote:
> On Thu, Apr 04, 2013 at 02:32:08PM +0200, Alexander Graf wrote:
>>
>> On 04.04.2013, at 14:08, Gleb Natapov wrote:
>>
>>> On Thu, Apr 04, 2013 at 01:57:34PM +0200, Alexander Graf wrote:
On 04.04.2013, at 12:50, Michael S. Tsirkin wrote:
On 04.04.2013, at 14:34, Gleb Natapov wrote:
> On Thu, Apr 04, 2013 at 02:22:09PM +0200, Alexander Graf wrote:
>>
>> On 04.04.2013, at 14:08, Gleb Natapov wrote:
>>
>>> On Thu, Apr 04, 2013 at 01:57:34PM +0200, Alexander Graf wrote:
On 04.04.2013, at 12:50, Michael S. Tsirkin wrote:
On Thu, Apr 04, 2013 at 02:32:08PM +0200, Alexander Graf wrote:
>
> On 04.04.2013, at 14:08, Gleb Natapov wrote:
>
> > On Thu, Apr 04, 2013 at 01:57:34PM +0200, Alexander Graf wrote:
> >>
> >> On 04.04.2013, at 12:50, Michael S. Tsirkin wrote:
> >>
> >>> With KVM, MMIO is much slower than PIO,
On Thu, Apr 04, 2013 at 02:22:09PM +0200, Alexander Graf wrote:
>
> On 04.04.2013, at 14:08, Gleb Natapov wrote:
>
> > On Thu, Apr 04, 2013 at 01:57:34PM +0200, Alexander Graf wrote:
> >>
> >> On 04.04.2013, at 12:50, Michael S. Tsirkin wrote:
> >>
> >>> With KVM, MMIO is much slower than PIO,
On 04.04.2013, at 14:08, Gleb Natapov wrote:
> On Thu, Apr 04, 2013 at 01:57:34PM +0200, Alexander Graf wrote:
>>
>> On 04.04.2013, at 12:50, Michael S. Tsirkin wrote:
>>
>>> With KVM, MMIO is much slower than PIO, due to the need to
>>> do page walk and emulation. But with EPT, it does not hav
On 04.04.2013, at 14:19, Gleb Natapov wrote:
> On Thu, Apr 04, 2013 at 02:09:53PM +0200, Alexander Graf wrote:
>>
>> On 04.04.2013, at 13:04, Michael S. Tsirkin wrote:
>>
>>> On Thu, Apr 04, 2013 at 01:57:34PM +0200, Alexander Graf wrote:
On 04.04.2013, at 12:50, Michael S. Tsirkin w
On 04.04.2013, at 14:08, Gleb Natapov wrote:
> On Thu, Apr 04, 2013 at 01:57:34PM +0200, Alexander Graf wrote:
>>
>> On 04.04.2013, at 12:50, Michael S. Tsirkin wrote:
>>
>>> With KVM, MMIO is much slower than PIO, due to the need to
>>> do page walk and emulation. But with EPT, it does not hav
On Thu, Apr 04, 2013 at 02:09:53PM +0200, Alexander Graf wrote:
>
> On 04.04.2013, at 13:04, Michael S. Tsirkin wrote:
>
> > On Thu, Apr 04, 2013 at 01:57:34PM +0200, Alexander Graf wrote:
> >>
> >> On 04.04.2013, at 12:50, Michael S. Tsirkin wrote:
> >>
> >>> With KVM, MMIO is much slower than
On Thu, Apr 04, 2013 at 02:09:53PM +0200, Alexander Graf wrote:
>
> On 04.04.2013, at 13:04, Michael S. Tsirkin wrote:
>
> > On Thu, Apr 04, 2013 at 01:57:34PM +0200, Alexander Graf wrote:
> >>
> >> On 04.04.2013, at 12:50, Michael S. Tsirkin wrote:
> >>
> >>> With KVM, MMIO is much slower than
On 04.04.2013, at 13:04, Michael S. Tsirkin wrote:
> On Thu, Apr 04, 2013 at 01:57:34PM +0200, Alexander Graf wrote:
>>
>> On 04.04.2013, at 12:50, Michael S. Tsirkin wrote:
>>
>>> With KVM, MMIO is much slower than PIO, due to the need to
>>> do page walk and emulation. But with EPT, it does n
On Thu, Apr 04, 2013 at 01:57:34PM +0200, Alexander Graf wrote:
>
> On 04.04.2013, at 12:50, Michael S. Tsirkin wrote:
>
> > With KVM, MMIO is much slower than PIO, due to the need to
> > do page walk and emulation. But with EPT, it does not have to be: we
> > know the address from the VMCS so if
On Thu, Apr 04, 2013 at 01:57:34PM +0200, Alexander Graf wrote:
>
> On 04.04.2013, at 12:50, Michael S. Tsirkin wrote:
>
> > With KVM, MMIO is much slower than PIO, due to the need to
> > do page walk and emulation. But with EPT, it does not have to be: we
> > know the address from the VMCS so if
On 04.04.2013, at 12:50, Michael S. Tsirkin wrote:
> With KVM, MMIO is much slower than PIO, due to the need to
> do page walk and emulation. But with EPT, it does not have to be: we
> know the address from the VMCS so if the address is unique, we can look
> up the eventfd directly, bypassing emu
With KVM, MMIO is much slower than PIO, due to the need to
do page walk and emulation. But with EPT, it does not have to be: we
know the address from the VMCS so if the address is unique, we can look
up the eventfd directly, bypassing emulation.
Add an interface for userspace to specify this per-a
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