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Thu, 11 Sep 2025 13:55:04 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 58BDt4Dx015538 for bugs@FreeBSD.org; Thu, 11 Sep 2025 13:55:04 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 263229] virtio vtnet driver with rxcsum errors Date: Thu, 11 Sep 2025 13:55:02 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 13.1-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: mike@sentex.net X-Bugzilla-Status: In Progress X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: attachments.created Message-ID: In-Reply-To: References: Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Bug reports List-Archive: https://lists.freebsd.org/archives/freebsd-bugs List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-bugs@FreeBSD.org MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D263229 --- Comment #27 from mike@sentex.net --- Created attachment 263708 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D263708&action= =3Dedit results of vtnet output Thank you for all the efforts here Michael, I (and I am sure the wider Free= BSD community) appreciate it greatly!! TLDR; maybe a problem with LRO still ? I set up 2 VMs R14 and R15 both with 2 interfaces and am using iperf3 to test speeds R14 and R15 share 192.168.122.0/24 as a common subnet iperf3 between 192.168.122.0/24 looks good at expected speeds doing both iperf3 -R -c 192.168.122.3 and iperf3 -c 192.168.122.3 gives between 15Gb/s and 18Gb/s which is great From R14 to an outside server on gigabit gets about gigabit in both directi= ons which is typical From R15 to an outside server on gigabit gets about gigabit in both directi= ons which is typical from R15 that is routed across R14's 192.168.122.0/24 network however, I am getting 2-3Mb/s If I=20 ifconfig vtnet0 -lro ifconfig vtnet1 -lro on the R14 box acting as a router, all works at expected speeds If I reverse the jobs or R14 and R15 so that R15 acts as the router, it is = the same issue. I have to do both interfaces for both directions to work otherwise just one direction gets full speed. --=20 You are receiving this mail because: You are the assignee for the bug.=