On Wed, 2008-07-16 at 19:57 +0300, Avi Kivity wrote:
> Ben-Ami Yassour wrote:
> >
> >> That CPU utilization is extremely high and somewhat illogical if native
> >> w/vt-d has almost no CPU impact. Have you run oprofile yet or have any
> >> insight into where CPU is being burnt?
> >>
> >> What
Anthony Liguori wrote:
> Ben-Ami Yassour wrote:
>> On Wed, 2008-07-16 at 17:36 +0300, Avi Kivity wrote:
>>
>>> Ben-Ami Yassour wrote:
>>>
In last few tests that we made with PCI-passthrough and VT-d using
iperf, we were able to get the same throughput as on native OS
with a 1G NIC
Ben-Ami Yassour wrote:
That CPU utilization is extremely high and somewhat illogical if native
w/vt-d has almost no CPU impact. Have you run oprofile yet or have any
insight into where CPU is being burnt?
What does kvm_stat look like? I wonder if there are a large number of
PIO exits. W
On Wed, 2008-07-16 at 10:23 -0500, Anthony Liguori wrote:
>
> What about virtio?
didn't try it yet.
> Also, which emulated is this?
the default
>
> That CPU utilization is extremely high and somewhat illogical if native
> w/vt-d has almost no CPU impact. Have you run oprofile yet or have a
Ben-Ami Yassour wrote:
On Wed, 2008-07-16 at 17:36 +0300, Avi Kivity wrote:
Ben-Ami Yassour wrote:
In last few tests that we made with PCI-passthrough and VT-d using
iperf, we were able to get the same throughput as on native OS with a 1G
NIC
Excellent!
(with higher CPU
Ben-Ami Yassour wrote:
(with higher CPU utilization).
How much higher?
Here are some numbers for running iperf -l 1M:
e1000 NIC (behind a PCI bridge)
Bandwidth (Mbit/sec)CPU utilization
Native OS 771 18%
Native
On Wed, 2008-07-16 at 17:36 +0300, Avi Kivity wrote:
> Ben-Ami Yassour wrote:
> > In last few tests that we made with PCI-passthrough and VT-d using
> > iperf, we were able to get the same throughput as on native OS with a 1G
> > NIC
>
> Excellent!
>
> > (with higher CPU utilization).
> >
>
Ben-Ami Yassour wrote:
In last few tests that we made with PCI-passthrough and VT-d using
iperf, we were able to get the same throughput as on native OS with a 1G
NIC
Excellent!
(with higher CPU utilization).
How much higher?
The following patches are the PCI-passthrough patches that
The following are the userspace patches
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