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p2p/enode: implement per-source timeout in FairMix (#25962)

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Co-authored-by: Felix Lange <fjl@twurst.com>
This commit is contained in:
zhiqiangxu 2022-11-08 19:12:36 +08:00 committed by GitHub
parent 53b624b56d
commit 4cb1fca43d
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1 changed files with 14 additions and 7 deletions
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21
p2p/enode/iter.go
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@ -203,27 +203,34 @@ func (m *FairMix) Close() {
func (m *FairMix) Next() bool {
m.cur = nil
var timeout <-chan time.Time
if m.timeout >= 0 {
timer := time.NewTimer(m.timeout)
timeout = timer.C
defer timer.Stop()
}
for {
source := m.pickSource()
if source == nil {
return m.nextFromAny()
}
var timeout <-chan time.Time
if source.timeout >= 0 {
timer := time.NewTimer(source.timeout)
timeout = timer.C
defer timer.Stop()
}
select {
case n, ok := <-source.next:
if ok {
m.cur = n
// Here, the timeout is reset to the configured value
// because the source delivered a node.
source.timeout = m.timeout
m.cur = n
return true
}
// This source has ended.
m.deleteSource(source)
case <-timeout:
// The selected source did not deliver a node within the timeout, so the
// timeout duration is halved for next time. This is supposed to improve
// latency with stuck sources.
source.timeout /= 2
return m.nextFromAny()
}