multi-vCPU networking issues as client OS under Xen

Laurence Pawling laurence.pawling at
Mon Feb 19 10:42:18 UTC 2018

>    When using >1 vCPUs can you set hw.xn.num_queues=1 on
>    /boot/loader.conf and try to reproduce the issue?
>    I'm afraid this is rather related to multiqueue (which is only used
>    if >1 vCPUs).
>    Thanks, Roger.

Roger - thanks for your quick reply, this is confirmed. Setting hw.xn.num_queues=1 on the server VM when vCPUs > 1 prevents the issue.

For reference, please can you comment on the performance impact of this?

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