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6a84778f2c
StdNetBind probes for UDP GSO and GRO support at runtime. UDP GSO is
dependent on checksum offload support on the egress netdev. UDP GSO
will be disabled in the event sendmmsg() returns EIO, which is a strong
signal that the egress netdev does not support checksum offload.
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 052af4a without UDP GSO or GRO.
Starting Test: protocol: TCP, 1 streams, 131072 byte blocks
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-10.00 sec 9.85 GBytes 8.46 Gbits/sec 1139 3.01 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
Test Complete. Summary Results:
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 9.85 GBytes 8.46 Gbits/sec 1139 sender
[ 5] 0.00-10.04 sec 9.85 GBytes 8.42 Gbits/sec receiver
The second result is with UDP GSO and GRO.
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
Reviewed-by: Adrian Dewhurst <adrian@tailscale.com>
Signed-off-by: Jordan Whited <jordan@tailscale.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
52 lines
1.3 KiB
Go
52 lines
1.3 KiB
Go
//go:build !linux || android
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/* SPDX-License-Identifier: MIT
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*
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* Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
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*/
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package conn
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import "net/netip"
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func (e *StdNetEndpoint) SrcIP() netip.Addr {
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return netip.Addr{}
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}
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func (e *StdNetEndpoint) SrcIfidx() int32 {
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return 0
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}
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func (e *StdNetEndpoint) SrcToString() string {
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return ""
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}
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// TODO: macOS, FreeBSD and other BSDs likely do support the sticky sockets
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// {get,set}srcControl feature set, but use alternatively named flags and need
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// ports and require testing.
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// getSrcFromControl parses the control for PKTINFO and if found updates ep with
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// the source information found.
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func getSrcFromControl(control []byte, ep *StdNetEndpoint) {
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}
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// setSrcControl parses the control for PKTINFO and if found updates ep with
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// the source information found.
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func setSrcControl(control *[]byte, ep *StdNetEndpoint) {
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}
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// getGSOSize parses control for UDP_GRO and if found returns its GSO size data.
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func getGSOSize(control []byte) (int, error) {
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return 0, nil
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}
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// setGSOSize sets a UDP_SEGMENT in control based on gsoSize.
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func setGSOSize(control *[]byte, gsoSize uint16) {
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}
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// controlSize returns the recommended buffer size for pooling sticky and UDP
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// offloading control data.
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const controlSize = 0
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const StdNetSupportsStickySockets = false
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