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d0bc03c707
Implement UDP GSO and GRO for the Linux tun.Device, which is made possible by virtio extensions in the kernel's TUN driver starting in v6.2. secnetperf, a QUIC benchmark utility from microsoft/msquic@8e1eb1a, is used to demonstrate the effect of this commit between two Linux computers with i5-12400 CPUs. There is roughly ~13us of round trip latency between them. secnetperf was invoked with the following command line options: -stats:1 -exec:maxtput -test:tput -download:10000 -timed:1 -encrypt:0 The first result is from commit 2e0774f without UDP GSO/GRO on the TUN. [conn][0x55739a144980] STATS: EcnCapable=0 RTT=3973 us SendTotalPackets=55859 SendSuspectedLostPackets=61 SendSpuriousLostPackets=59 SendCongestionCount=27 SendEcnCongestionCount=0 RecvTotalPackets=2779122 RecvReorderedPackets=0 RecvDroppedPackets=0 RecvDuplicatePackets=0 RecvDecryptionFailures=0 Result: 3654977571 bytes @ 2922821 kbps (10003.972 ms). The second result is with UDP GSO/GRO on the TUN. [conn][0x56493dfd09a0] STATS: EcnCapable=0 RTT=1216 us SendTotalPackets=165033 SendSuspectedLostPackets=64 SendSpuriousLostPackets=61 SendCongestionCount=53 SendEcnCongestionCount=0 RecvTotalPackets=11845268 RecvReorderedPackets=25267 RecvDroppedPackets=0 RecvDuplicatePackets=0 RecvDecryptionFailures=0 Result: 15574671184 bytes @ 12458214 kbps (10001.222 ms). Signed-off-by: Jordan Whited <jordan@tailscale.com> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> |
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| .. | ||
| netstack | ||
| tuntest | ||
| alignment_windows_test.go | ||
| checksum_test.go | ||
| checksum.go | ||
| errors.go | ||
| offload_linux_test.go | ||
| offload_linux.go | ||
| operateonfd.go | ||
| tun_darwin.go | ||
| tun_freebsd.go | ||
| tun_linux.go | ||
| tun_openbsd.go | ||
| tun_windows.go | ||
| tun.go | ||