Date: Tue, 14 Oct 2025 13:13:31 +0000 From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 276760] vtnet driver incorrectly calculates checksums Message-ID: <bug-276760-7501-s5I4dL0fjK@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-276760-7501@https.bugs.freebsd.org/bugzilla/> References: <bug-276760-7501@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D276760 --- Comment #19 from vova@fbsd.ru --- Interesting results: 14.3p4 ifconfig_vtnet0=3D"DHCP -tso4 -tso6 -lro -rxcsum" Download: 1938.88 Mbps Upload: 789.48 Mbps=20 # speedtest-go speedtest-go v1.7.10 (git-dev) @showwin =E2=9C=93 ISP: 128.140.36.15 (Hetzner Online) [53.5774, 10.0785] =E2=9C=93 Found 20 Public Servers =E2=9C=93 Test Server: [69030] 467.36km Nuremberg (Germany) by Advin Servic= es LLC =E2=9C=93 Latency: 974.539=C2=B5s Jitter: 342.617=C2=B5s Min: 659.889=C2=B5= s Max: 1.746697ms =E2=9C=93 Packet Loss Analyzer: Running in background (<=3D 30 Secs) =E2=9C=93 Download: 1938.88 Mbps (Used: 2298.54MB) (Latency: 2ms Jitter: 1m= s Min: 0ms Max: 5ms) =E2=9C=93 Upload: 789.48 Mbps (Used: 983.55MB) (Latency: 4ms Jitter: 5ms Mi= n: 0ms Max: 20ms) =E2=9C=93 Packet Loss: N/A in vnet container (under pf nat): Speedtest by Ookla Server: Advin Services LLC - Nuremberg (id: 69030) ISP: Hetzner Online Idle Latency: 0.40 ms (jitter: 0.06ms, low: 0.36ms, high: 0.49ms) Download: 1504.38 Mbps (data used: 2.4 GB) 5.13 ms (jitter: 15.33ms, low: 0.36ms, high: 226.18ms) Upload: 1425.73 Mbps (data used: 1.9 GB) 2.02 ms (jitter: 5.17ms, low: 0.33ms, high: 379.86ms) Packet Loss: 0.0% 14.3p4 ifconfig_vtnet0=3D"DHCP" dramatically worse: Download: 719.23 Mbps Upload: 485.25 Mbps # ifconfig vtnet0 vtnet0: flags=3D1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP> me= tric 0 mtu 1500 =20=20=20=20=20=20=20 options=3Dec07bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSU= M,TSO4,TSO6,LRO,VLAN_HWTSO,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6,HWSTATS> speedtest-go speedtest-go v1.7.10 (git-dev) @showwin =E2=9C=93 ISP: 128.140.36.15 (Hetzner Online) [53.5774, 10.0785] =E2=9C=93 Found 20 Public Servers =E2=9C=93 Test Server: [60469] 467.36km Nuremberg (Germany) by netcup GmbH =E2=9C=93 Latency: 1.107351ms Jitter: 172.438=C2=B5s Min: 800.457=C2=B5s Ma= x: 1.378362ms =E2=9C=93 Packet Loss Analyzer: Running in background (<=3D 30 Secs) =E2=9C=93 Download: 719.23 Mbps (Used: 770.40MB) (Latency: 1ms Jitter: 0ms = Min: 0ms Max: 2ms) =E2=9C=93 Upload: 485.25 Mbps (Used: 945.52MB) (Latency: 1ms Jitter: 0ms Mi= n: 0ms Max: 4ms) =E2=9C=93 Packet Loss: 0.48% (Sent: 415/Dup: 0/Max: 416) in vnet container (under pf nat): Speedtest by Ookla Server: Advin Services LLC - Nuremberg (id: 69030) ISP: Hetzner Online Idle Latency: 0.67 ms (jitter: 0.77ms, low: 0.34ms, high: 1.50ms) Download: 166.12 Mbps (data used: 243.8 MB) 0.77 ms (jitter: 0.51ms, low: 0.37ms, high: 5.65ms) Upload: 1595.95 Mbps (data used: 2.1 GB) 7.03 ms (jitter: 6.94ms, low: 0.70ms, high: 256.62ms) Packet Loss: 0.0% 14.3-STABLE stable/14-087fc6ae0a8c ifconfig_vtnet0=3D"DHCP" Still not that good as before, but in vnet container - event better Download: 972.67 Mbps=20 Upload: 523.19 Mbps=20 # speedtest-go speedtest-go v1.7.10 (git-dev) @showwin =E2=9C=93 ISP: 128.140.36.15 (Hetzner Online) [53.5774, 10.0785] =E2=9C=93 Found 20 Public Servers =E2=9C=93 Test Server: [60469] 467.36km Nuremberg (Germany) by netcup GmbH =E2=9C=93 Latency: 905.265=C2=B5s Jitter: 54.375=C2=B5s Min: 808.469=C2=B5s= Max: 983.836=C2=B5s =E2=9C=93 Packet Loss Analyzer: Running in background (<=3D 30 Secs) =E2=9C=93 Download: 972.67 Mbps (Used: 1283.25MB) (Latency: 1ms Jitter: 0ms= Min: 0ms Max: 3ms) =E2=9C=93 Upload: 523.19 Mbps (Used: 661.66MB) (Latency: 5ms Jitter: 6ms Mi= n: 0ms Max: 24ms) =E2=9C=93 Packet Loss: 0.00% (Sent: 283/Dup: 0/Max: 282) in vnet container (under pf nat): Speedtest by Ookla Server: Advin Services LLC - Nuremberg (id: 69030) ISP: Hetzner Online Idle Latency: 0.40 ms (jitter: 0.10ms, low: 0.32ms, high: 0.48ms) Download: 1813.96 Mbps (data used: 1.2 GB) 10.73 ms (jitter: 14.93ms, low: 1.37ms, high: 97.34ms) Upload: 1624.39 Mbps (data used: 2.8 GB) 3.16 ms (jitter: 8.67ms, low: 0.37ms, high: 325.18ms) Packet Loss: 0.0% and after returning to no offload: Download: 2052.35 Mbps Upload: 772.36 Mbps # ifconfig vtnet0 -tso4 -tso6 -lro -rxcsum # ifconfig vtnet0 vtnet0: flags=3D1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP> me= tric 0 mtu 1500 =20=20=20=20=20=20=20 options=3Dcc00ba<TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,VLAN_= HWTSO,LINKSTATE,TXCSUM_IPV6,HWSTATS> # speedtest-go speedtest-go v1.7.10 (git-dev) @showwin =E2=9C=93 ISP: 128.140.36.15 (Hetzner Online) [53.5774, 10.0785] =E2=9C=93 Found 20 Public Servers =E2=9C=93 Test Server: [69030] 467.36km Nuremberg (Germany) by Advin Servic= es LLC =E2=9C=93 Latency: 662.361=C2=B5s Jitter: 113.466=C2=B5s Min: 527.393=C2=B5= s Max: 883.733=C2=B5s =E2=9C=93 Packet Loss Analyzer: Running in background (<=3D 30 Secs) =E2=9C=93 Download: 2052.35 Mbps (Used: 2593.14MB) (Latency: 3ms Jitter: 2m= s Min: 0ms Max: 8ms) =E2=9C=93 Upload: 772.36 Mbps (Used: 992.49MB) (Latency: 5ms Jitter: 3ms Mi= n: 0ms Max: 12ms) =E2=9C=93 Packet Loss: N/A in vnet container (under pf nat): Speedtest by Ookla Server: Advin Services LLC - Nuremberg (id: 69030) ISP: Hetzner Online Idle Latency: 0.43 ms (jitter: 0.03ms, low: 0.37ms, high: 0.44ms) Download: 2085.06 Mbps (data used: 1.1 GB) 12.66 ms (jitter: 21.69ms, low: 3.21ms, high: 237.03ms) Upload: 1584.51 Mbps (data used: 1.9 GB) 3.69 ms (jitter: 11.17ms, low: 0.41ms, high: 224.69ms) All measurements may be not that percise - virtual machine is chipest possi= ble. --=20 You are receiving this mail because: You are on the CC list for the bug.=
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