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wgengine/magicsock: simplify ReceiveIPv4+DERP path

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name           old time/op  new time/op  delta
ReceiveFrom-4  35.8µs ± 3%  21.9µs ± 5%  -38.92%  (p=0.008 n=5+5)

Fixes #1145
Updates #414

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2021-01-18 08:39:52 -08:00
committed by Brad Fitzpatrick
parent 9936cffc1a
commit 5c619882bc
2 changed files with 159 additions and 194 deletions
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5
wgengine/magicsock/magicsock_test.go
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@ -20,6 +20,7 @@ import (
"strconv"
"strings"
"sync"
"sync/atomic"
"testing"
"time"
"unsafe"
@ -1381,7 +1382,7 @@ func stringifyConfig(cfg wgcfg.Config) string {
return string(j)
}
func TestDiscoEndpointAlignment(t *testing.T) {
func Test32bitAlignment(t *testing.T) {
var de discoEndpoint
off := unsafe.Offsetof(de.lastRecvUnixAtomic)
if off%8 != 0 {
@ -1393,6 +1394,8 @@ func TestDiscoEndpointAlignment(t *testing.T) {
if de.isFirstRecvActivityInAwhile() {
t.Error("expected false on second call")
}
var c Conn
atomic.AddInt64(&c.derpRecvCountAtomic, 1)
}
func BenchmarkReceiveFrom(b *testing.B) {