mirror of
https://git.zx2c4.com/wireguard-go
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4201e08f1d
After reducing UDP stack traversal overhead via GSO and GRO, runtime.chanrecv() began to account for a high percentage (20% in one environment) of perf samples during a throughput benchmark. The individual packet channel ops with the crypto goroutines was the primary contributor to this overhead. Updating these channels to pass vectors, which the device package already handles at its ends, reduced this overhead substantially, and improved throughput. 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 with UDP GSO and GRO, and with single element channels. Starting Test: protocol: TCP, 1 streams, 131072 byte blocks [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-10.00 sec 12.3 GBytes 10.6 Gbits/sec 232 3.15 MBytes - - - - - - - - - - - - - - - - - - - - - - - - - Test Complete. Summary Results: [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 12.3 GBytes 10.6 Gbits/sec 232 sender [ 5] 0.00-10.04 sec 12.3 GBytes 10.6 Gbits/sec receiver The second result is with channels updated to pass a slice of elements. Starting Test: protocol: TCP, 1 streams, 131072 byte blocks [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-10.00 sec 13.2 GBytes 11.3 Gbits/sec 182 3.15 MBytes - - - - - - - - - - - - - - - - - - - - - - - - - Test Complete. Summary Results: [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 13.2 GBytes 11.3 Gbits/sec 182 sender [ 5] 0.00-10.04 sec 13.2 GBytes 11.3 Gbits/sec receiver Reviewed-by: Adrian Dewhurst <adrian@tailscale.com> Signed-off-by: Jordan Whited <jordan@tailscale.com> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> |
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| .. | ||
| allowedips_rand_test.go | ||
| allowedips_test.go | ||
| allowedips.go | ||
| bind_test.go | ||
| channels.go | ||
| constants.go | ||
| cookie_test.go | ||
| cookie.go | ||
| device_test.go | ||
| device.go | ||
| devicestate_string.go | ||
| endpoint_test.go | ||
| indextable.go | ||
| ip.go | ||
| kdf_test.go | ||
| keypair.go | ||
| logger.go | ||
| mobilequirks.go | ||
| noise_test.go | ||
| noise-helpers.go | ||
| noise-protocol.go | ||
| noise-types.go | ||
| peer.go | ||
| pools_test.go | ||
| pools.go | ||
| queueconstants_android.go | ||
| queueconstants_default.go | ||
| queueconstants_ios.go | ||
| queueconstants_windows.go | ||
| race_disabled_test.go | ||
| race_enabled_test.go | ||
| receive.go | ||
| send.go | ||
| sticky_default.go | ||
| sticky_linux.go | ||
| timers.go | ||
| tun.go | ||
| uapi.go | ||