This commit increases gVisor's TCP max send (4->6MiB) and receive
(4->8MiB) buffer sizes on all platforms except iOS. These values are
biased towards higher throughput on high bandwidth-delay product paths.
The iperf3 results below demonstrate the effect of this commit between
two Linux computers with i5-12400 CPUs. 100ms of RTT latency is
introduced via Linux's traffic control network emulator queue
discipline.
The first set of results are from commit f0230ce prior to TCP buffer
resizing.
gVisor write direction:
Test Complete. Summary Results:
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 180 MBytes 151 Mbits/sec 0 sender
[ 5] 0.00-10.10 sec 179 MBytes 149 Mbits/sec receiver
gVisor read direction:
Test Complete. Summary Results:
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.10 sec 337 MBytes 280 Mbits/sec 20 sender
[ 5] 0.00-10.00 sec 323 MBytes 271 Mbits/sec receiver
The second set of results are from this commit with increased TCP
buffer sizes.
gVisor write direction:
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 297 MBytes 249 Mbits/sec 0 sender
[ 5] 0.00-10.10 sec 297 MBytes 247 Mbits/sec receiver
gVisor read direction:
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.10 sec 501 MBytes 416 Mbits/sec 17 sender
[ 5] 0.00-10.00 sec 485 MBytes 407 Mbits/sec receiver
Updates #9707
Updates tailscale/corp#22119
Signed-off-by: Jordan Whited <jordan@tailscale.com>
This repository contains the majority of Tailscale's open source code.
Notably, it includes the tailscaled daemon and
the tailscale CLI tool. The tailscaled daemon runs on Linux, Windows,
macOS, and to varying degrees
on FreeBSD and OpenBSD. The Tailscale iOS and Android apps use this repo's
code, but this repo doesn't contain the mobile GUI code.
The macOS, iOS, and Windows clients
use the code in this repository but additionally include small GUI
wrappers. The GUI wrappers on non-open source platforms are themselves
not open source.
Building
We always require the latest Go release, currently Go 1.22. (While we build
releases with our Go fork, its use is not
required.)
go install tailscale.com/cmd/tailscale{,d}
If you're packaging Tailscale for distribution, use build_dist.sh
instead, to burn commit IDs and version info into the binaries:
If your distro has conventions that preclude the use of
build_dist.sh, please do the equivalent of what it does in your
distro's way, so that bug reports contain useful version information.
Bugs
Please file any issues about this code or the hosted service on
the issue tracker.
Contributing
PRs welcome! But please file bugs. Commit messages should reference
bugs.
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