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more debugging
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parent
95201669fe
commit
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@ -1,6 +1,12 @@
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package yggdrasil
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// TODO signal to predecessor when we replace them?
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// Sending a ping with an extra 0 at the end of our coords should be enough to reset our throttle in their table
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// That should encorage them to ping us again sooner, and then we can reply with new info
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// Maybe remember old predecessor and check this during maintenance?
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import (
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"fmt"
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"sort"
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"time"
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)
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@ -146,22 +152,32 @@ func (t *dht) insert(info *dhtInfo) {
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// Return true if first/second/third are (partially) ordered correctly
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// FIXME? maybe total ordering makes more sense
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func dht_ordered(first, second, third *NodeID) bool {
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var ordered bool
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for idx := 0; idx < NodeIDLen; idx++ {
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f, s, t := first[idx], second[idx], third[idx]
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switch {
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case f == s && s == t:
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continue
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case f <= s && s <= t:
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ordered = true // nothing wrapped around 0
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case t <= f && f <= s:
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ordered = true // 0 is between second and third
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case s <= t && t <= f:
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ordered = true // 0 is between first and second
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lessOrEqual := func(first, second *NodeID) bool {
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for idx := 0; idx < NodeIDLen; idx++ {
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if first[idx] > second[idx] {
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return false
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}
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if first[idx] < second[idx] {
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return true
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}
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}
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break
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return true
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}
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return ordered
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firstLessThanSecond := lessOrEqual(first, second)
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secondLessThanThird := lessOrEqual(second, third)
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thirdLessThanFirst := lessOrEqual(third, first)
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switch {
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case firstLessThanSecond && secondLessThanThird:
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// Nothing wrapped around 0, the easy case
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return true
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case thirdLessThanFirst && firstLessThanSecond:
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// Third wrapped around 0
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return true
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case secondLessThanThird && thirdLessThanFirst:
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// Second (and third) wrapped around 0
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return true
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}
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return false
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}
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// Reads a request, performs a lookup, and responds.
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@ -254,6 +270,9 @@ func (t *dht) handleRes(res *dhtRes) {
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predecessor = info
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}
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}
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if len(res.Infos) > dht_lookup_size {
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res.Infos = res.Infos[:dht_lookup_size]
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}
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for _, info := range res.Infos {
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if *info.getNodeID() == t.nodeID {
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continue
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@ -331,8 +350,29 @@ func (t *dht) doMaintenance() {
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t.ping(successor, nil)
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successor.pings++
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successor.throttle += time.Second
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/////
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if now.Sub(t.search) > 30*time.Second {
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t.search = now
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target := successor.getNodeID().prev()
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sinfo, isIn := t.core.searches.searches[target]
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if !isIn {
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var mask NodeID
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for idx := range mask {
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mask[idx] = 0xff
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}
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sinfo = t.core.searches.newIterSearch(&target, &mask)
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}
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t.core.searches.continueSearch(sinfo)
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}
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/////
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return
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fmt.Println("DEBUG self:", t.nodeID[:8], "throttle:", successor.throttle, "nodeID:", successor.getNodeID()[:8], "coords:", successor.coords)
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for infoID := range t.table {
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fmt.Println("DEBUG other info:", infoID[:8], "ordered", dht_ordered(&t.nodeID, &infoID, successor.getNodeID()), "swapped:", dht_ordered(&t.nodeID, successor.getNodeID(), &infoID))
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}
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if successor.throttle > 30*time.Second {
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successor.throttle = 30 * time.Second
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}
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fmt.Println("Table size:", len(t.table))
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}
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}
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@ -183,8 +183,10 @@ func (p *peer) linkLoop() {
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}
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p.sendSwitchMsg()
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case _ = <-tick.C:
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if p.dinfo != nil {
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p.core.dht.peers <- p.dinfo
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pdinfo := p.dinfo // FIXME this is a bad workarond NPE on the next line
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if pdinfo != nil {
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dinfo := *pdinfo
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p.core.dht.peers <- &dinfo
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}
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}
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}
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@ -92,6 +92,7 @@ func (r *router) mainLoop() {
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r.sendPacket(p)
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case info := <-r.core.dht.peers:
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r.core.dht.insert(info)
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info.throttle = 0
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case <-r.reset:
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r.core.sessions.resetInits()
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r.core.dht.reset()
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