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
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