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wgengine/magicsock: allow even fewer allocs per UDP receive

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We improved things again for Go 1.18. Lock that in.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
This commit is contained in:
Josh Bleecher Snyder 2021-10-27 16:03:18 -07:00 committed by Josh Bleecher Snyder
parent c1d377078d
commit 1df865a580
1 changed files with 6 additions and 2 deletions
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8
wgengine/magicsock/magicsock_test.go
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@ -1341,11 +1341,15 @@ func TestReceiveFromAllocs(t *testing.T) {
t.Skip("alloc tests are unreliable with -race")
}
// Go 1.16 and before: allow 3 allocs.
// Go Tailscale fork, Go 1.17+: only allow 2 allocs.
// Go 1.17: allow 2 allocs.
// Go Tailscale fork, Go 1.18+: allow 1 alloc.
major, ts := goMajorVersion(runtime.Version())
maxAllocs := 3
if major >= 17 || ts {
switch {
case major == 17:
maxAllocs = 2
case major >= 18, ts:
maxAllocs = 1
}
t.Logf("allowing %d allocs for Go version %q", maxAllocs, runtime.Version())
roundTrip := setUpReceiveFrom(t)