Ben-Ami Yassour wrote:
I am running virtio with the latest KVM code, and see a significant
performance issue.
Ping to the host (or any other close machine) reports a 4ms delay.
What kvm version and what host kernel version?
It's very easy to mistakenly compile qemu without GSO support too. You
have to make sure that the 2.6.27 if_tun.h is being included by QEMU.
Regards,
Anthony Liguori
In the same setup with an e1000 emulation (just changing model=virtio to
model=e1000 in the KVM command line), ping reports 0.177ms delay.
BTW, initially I saw that the throughput when using netperf is very low,
even from guest to host, even though the CPU utilization is low.
What might be the problem?
Thanks,
Ben
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