Hi,

you're talking about CPU pinning in the amphora VM, right? or on the hypervisor?

IMHO it doesn't make sense to enable both CPU pinning _in_ the amphora and multiqueue.

If I'm not mistaken, CPU pinning in the amphora dedicates n-1 vCPUs to haproxy, while the remaining vCPU is used by the IOs and the system. so enabling multiqueue doesn't help because the queues will be used on 1 vCPU.

Greg

On Mon, Nov 18, 2024 at 3:07 AM <yardalgedal@gmail.com> wrote:

Hi, openstack team, is someone tested CPU pinning together with enabled multiqueue for VM?

I'm seeing huge performance degradation (750k RPS => 200k RPS) on flavor with 16 vCPUs and 16 gb ram when using image built with CPU pinning vs image without it, we're using zed (I've backported commits to check, but I think newer versions can also be affected), haproxy 2.4, ubuntu 22.04.