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[release-branch.go1.8] net/http: update bundled http2 for gracefulShutdownCh lock contention slowdown

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This updates the bundled x/net/http2 repo to git rev 186fd3fc (from
the net repo's release-branch.go1.8) for:

    [release-branch.go1.8] http2: fix lock contention slowdown due to gracefulShutdownCh
    https://golang.org/cl/43459

Fixes #20302

Change-Id: Ia01a44c6749292de9c16ca330bdebe1e52458b18
Reviewed-on: https://go-review.googlesource.com/43996
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Chris Broadfoot <cbro@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Brad Fitzpatrick 2017-05-23 20:12:26 +00:00
parent 51f508bb4a
commit f55bc1c4eb
1 changed files with 15 additions and 4 deletions
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19
src/net/http/h2_bundle.go
View File

@ -1,4 +1,4 @@
// Code generated by golang.org/x/tools/cmd/bundle.
// Code generated by golang.org/x/tools/cmd/bundle. DO NOT EDIT.
//go:generate bundle -o h2_bundle.go -prefix http2 -underscore golang.org/x/net/http2
// Package http2 implements the HTTP/2 protocol.
@ -3536,9 +3536,13 @@ func (sc *http2serverConn) serve() {
sc.idleTimerCh = sc.idleTimer.C
}
var gracefulShutdownCh <-chan struct{}
var gracefulShutdownCh chan struct{}
if sc.hs != nil {
gracefulShutdownCh = http2h1ServerShutdownChan(sc.hs)
ch := http2h1ServerShutdownChan(sc.hs)
if ch != nil {
gracefulShutdownCh = make(chan struct{})
go sc.awaitGracefulShutdown(ch, gracefulShutdownCh)
}
}
go sc.readFrames()
@ -3587,6 +3591,14 @@ func (sc *http2serverConn) serve() {
}
}
func (sc *http2serverConn) awaitGracefulShutdown(sharedCh <-chan struct{}, privateCh chan struct{}) {
select {
case <-sc.doneServing:
case <-sharedCh:
close(privateCh)
}
}
// readPreface reads the ClientPreface greeting from the peer
// or returns an error on timeout or an invalid greeting.
func (sc *http2serverConn) readPreface() error {
@ -6003,7 +6015,6 @@ func http2commaSeparatedTrailers(req *Request) (string, error) {
}
if len(keys) > 0 {
sort.Strings(keys)
return strings.Join(keys, ","), nil
}
return "", nil