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 (with higher CPU utilization).
The following patches are the PCI-passthrough patches that Amit sent
(re-based on the last kvm tree), followed by a few
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).
How much
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
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:
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.
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
Excellent!
