Hi, all
I start a VM with virtio-serial (default ports number: 31), and found
that virtio-blk performance degradation happened, about 25%, this
problem can be reproduced 100%.
without virtio-serial:
4k-read-random 1186 IOPS
with virtio-serial:
4k-read-random 871 IOPS
On Mon, 09/22 21:23, Zhang Haoyu wrote:
Amit,
It's related to the big number of ioeventfds used in virtio-serial-pci. With
virtio-serial-pci's ioeventfd=off, the performance is not affected no matter
if
guest initializes it or not.
In my test, there are 12 fds to poll in qemu_poll_ns
Hi, all
I start a VM with virtio-serial (default ports number: 31), and found
that virtio-blk performance degradation happened, about 25%, this
problem can be reproduced 100%.
without virtio-serial:
4k-read-random 1186 IOPS
with virtio-serial:
4k-read-random 871 IOPS
but
Hi, all
I start a VM with virtio-serial (default ports number: 31), and found
that virtio-blk performance degradation happened, about 25%, this problem
can be reproduced 100%.
without virtio-serial:
4k-read-random 1186 IOPS
with virtio-serial:
4k-read-random 871 IOPS
but
