yggdrasil-network/yggdrasil-go
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explicitly notify the switch when a link appears to be blocked in a send instead of assuming this is the case for all idle links. how we decide when it's really blocked still needs testing/optimizing

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This commit is contained in:
Arceliar 2019-09-24 18:01:35 -05:00
parent 691192ff5a
commit 8c64e6fa09
2 changed files with 42 additions and 9 deletions
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17
src/yggdrasil/link.go
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@ -64,6 +64,8 @@ type linkInterface struct {
closeTimer *time.Timer // Fires when the link has been idle so long we need to close it
inSwitch bool // True if the switch is tracking this link
stalled bool // True if we haven't been receiving any response traffic
sendSeqSent uint // Incremented each time we start sending
sendSeqRecv uint // Incremented each time we finish sending
}
func (l *link) init(c *Core) error {
@ -273,9 +275,23 @@ func (intf *linkInterface) notifySending(size int, isLinkTraffic bool) {
}
intf.sendTimer = time.AfterFunc(sendTime, intf.notifyBlockedSend)
intf._cancelStallTimer()
intf.sendSeqSent++
seq := intf.sendSeqSent
intf.Act(nil, func() {
intf._checkSending(seq)
})
})
}
// If check if we're still sending
func (intf *linkInterface) _checkSending(seq uint) {
if intf.sendSeqRecv != seq {
intf.link.core.switchTable.Act(intf, func() {
intf.link.core.switchTable._sendingIn(intf.peer.port)
})
}
}
// we just sent something, so cancel any pending timer to send keep-alive traffic
func (intf *linkInterface) _cancelStallTimer() {
if intf.stallTimer != nil {
@ -305,6 +321,7 @@ func (intf *linkInterface) notifySent(size int, isLinkTraffic bool) {
if size > 0 && intf.stallTimer == nil {
intf.stallTimer = time.AfterFunc(stallTime, intf.notifyStalled)
}
intf.sendSeqRecv++
})
}