[Bug 276760] vtnet driver incorrectly calculates checksums
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Date: Wed, 15 Oct 2025 07:03:57 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=276760
--- Comment #20 from Michael Tuexen <tuexen@freebsd.org> ---
(In reply to vova from comment #19)
That is really interesting. If I summarize it correctly, we have:
vtnet:
14.3 stable/14
send w/o offloading 789 772
send w/ offloading 485 523
recv w/o offloading 1938 2052
recv w/ offloading 719 972
vnet:
14.3 stable/14
send w/ offloading 1595 1624
send w/o offloading 1425 1584
recv w/ offloading 166 1813
recv w/o offloading 1504 1085
(stable/14 of October 9th; Speed is in Mbps)
What is your setup? I would like to be able to reproduce this locally?
Are you just running the speedtests in a VM using vtnet? Or are other VMs doing
forwarding involved? What is your setup with the vnet? Which interfaces are
used in that case.
Thanks for testing!
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