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tailscale/cmd/tailscaled
Jordan Whited f0230ce0b5
go.mod,net/tstun,wgengine/netstack: implement gVisor TCP GRO for Linux (#12921)
This commit implements TCP GRO for packets being written to gVisor on
Linux. Windows support will follow later. The wireguard-go dependency is
updated in order to make use of newly exported IP checksum functions.
gVisor is updated in order to make use of newly exported
stack.PacketBuffer GRO logic.

TCP throughput towards gVisor, i.e. TUN write direction, is dramatically
improved as a result of this commit. Benchmarks show substantial
improvement, sometimes as high as 2x. High bandwidth-delay product
paths remain receive window limited, bottlenecked by gVisor's default
TCP receive socket buffer size. This will be addressed in a  follow-on
commit.

The iperf3 results below demonstrate the effect of this commit between
two Linux computers with i5-12400 CPUs. There is roughly ~13us of round
trip latency between them.

The first result is from commit 57856fc without TCP GRO.

Starting Test: protocol: TCP, 1 streams, 131072 byte blocks
- - - - - - - - - - - - - - - - - - - - - - - - -
Test Complete. Summary Results:
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  4.77 GBytes  4.10 Gbits/sec   20 sender
[  5]   0.00-10.00  sec  4.77 GBytes  4.10 Gbits/sec      receiver

The second result is from this commit with TCP GRO.

Starting Test: protocol: TCP, 1 streams, 131072 byte blocks
- - - - - - - - - - - - - - - - - - - - - - - - -
Test Complete. Summary Results:
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  10.6 GBytes  9.14 Gbits/sec   20 sender
[  5]   0.00-10.00  sec  10.6 GBytes  9.14 Gbits/sec      receiver

Updates #6816

Signed-off-by: Jordan Whited <jordan@tailscale.com>
4 months ago
..
childproc all: update copyright and license headers 2 years ago
debug.go net/netmon, add: add netmon.State type alias of interfaces.State 7 months ago
depaware.txt go.mod,net/tstun,wgengine/netstack: implement gVisor TCP GRO for Linux (#12921) 4 months ago
generate.go cmd/mkmanifest, cmd/tailscale, cmd/tailscaled: remove Windows arm32 resources from OSS 2 years ago
install_darwin.go all: update copyright and license headers 2 years ago
install_windows.go all: update copyright and license headers 2 years ago
manifest_windows_386.syso cmd/{tailscale,tailscaled}: embed manifest into Windows binaries 2 years ago
manifest_windows_amd64.syso cmd/{tailscale,tailscaled}: embed manifest into Windows binaries 2 years ago
manifest_windows_arm64.syso cmd/{tailscale,tailscaled}: embed manifest into Windows binaries 2 years ago
proxy.go all: update copyright and license headers 2 years ago
required_version.go all: require Go 1.21 1 year ago
sigpipe.go all: adjust some build tags for plan9 1 year ago
ssh.go all: update copyright and license headers 2 years ago
taildrop.go taildrop: remove breaking abstraction layers for apple (#10728) 11 months ago
tailscaled.defaults cmd/tailscaled: rename relaynode reference in defaults file comment 5 years ago
tailscaled.go net/dns, cmd/tailscaled: plumb system health tracker into dns cleanup (#12969) 4 months ago
tailscaled.openrc tstest/integration/vms: use an in-process logcatcher (#2360) 3 years ago
tailscaled.service cmd/tailscaled: move cleanup to an implicit action during startup 8 months ago
tailscaled_bird.go all: update copyright and license headers 2 years ago
tailscaled_notwindows.go all: update copyright and license headers 2 years ago
tailscaled_test.go all: do not depend on the testing package 6 months ago
tailscaled_windows.go cmd/tailscaled, net/dns, wgengine/router: start Windows child processes with DETACHED_PROCESS when I/O is being piped 6 months ago
windows-manifest.xml cmd/{tailscale,tailscaled}: embed manifest into Windows binaries 2 years ago
with_cli.go all: update copyright and license headers 2 years ago