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authorWei-Ning Huang <w@dexon.org>2019-01-18 22:22:07 +0800
committerWei-Ning Huang <w@byzantine-lab.io>2019-06-12 17:27:21 +0800
commitef717fb072e85cabf6cef99206078d3fa2decd10 (patch)
treecc2a1b269ebfe4768afc6c21798ef2095a3f2033
parentc2c6f9629f7ff386b9599cf3fce73de0a3c234a6 (diff)
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p2p: report latency and relative latency to datadog (#162)
-rw-r--r--p2p/metrics.go5
-rw-r--r--p2p/peer.go12
2 files changed, 14 insertions, 3 deletions
diff --git a/p2p/metrics.go b/p2p/metrics.go
index 8bd902286..4ed164431 100644
--- a/p2p/metrics.go
+++ b/p2p/metrics.go
@@ -37,6 +37,8 @@ const (
MetricsInboundTraffic = "p2p/InboundTraffic" // Name for the registered inbound traffic meter
MetricsOutboundConnects = "p2p/OutboundConnects" // Name for the registered outbound connects meter
MetricsOutboundTraffic = "p2p/OutboundTraffic" // Name for the registered outbound traffic meter
+ MetricsLatency = "p2p/Latency" // Name for the registered Latency gauge
+ MetricsRelativeLatency = "p2p/RelativeLatency" // Name for the registered Relative Latency gauge
MeteredPeerLimit = 1024 // This amount of peers are individually metered
)
@@ -52,6 +54,9 @@ var (
meteredPeerFeed event.Feed // Event feed for peer metrics
meteredPeerCount int32 // Actually stored peer connection count
+
+ peerLatency = metrics.NewRegisteredGauge(MetricsLatency, nil) // Gauge latency
+ peerRelativeLatency = metrics.NewRegisteredGauge(MetricsRelativeLatency, nil) // Gauge Relative latency
)
// MeteredPeerEventType is the type of peer events emitted by a metered connection.
diff --git a/p2p/peer.go b/p2p/peer.go
index 3d6ce9dcd..9183082a1 100644
--- a/p2p/peer.go
+++ b/p2p/peer.go
@@ -260,7 +260,7 @@ func (p *Peer) pingLoop() {
for {
select {
case <-ping.C:
- if err := SendItems(p.rw, pingMsg); err != nil {
+ if err := SendItems(p.rw, pingMsg, uint64(time.Now().UnixNano())); err != nil {
p.protoErr <- err
return
}
@@ -290,8 +290,14 @@ func (p *Peer) readLoop(errc chan<- error) {
func (p *Peer) handle(msg Msg) error {
switch {
case msg.Code == pingMsg:
- msg.Discard()
- go SendItems(p.rw, pongMsg)
+ var pingTime [1]uint64
+ rlp.Decode(msg.Payload, &pingTime)
+ peerRelativeLatency.Update((time.Now().UnixNano() - int64(pingTime[0])) / 1000)
+ go SendItems(p.rw, pongMsg, pingTime[0])
+ case msg.Code == pongMsg:
+ var pingTime [1]uint64
+ rlp.Decode(msg.Payload, &pingTime)
+ peerLatency.Update((time.Now().UnixNano() - int64(pingTime[0])) / 2 / 1000)
case msg.Code == discMsg:
var reason [1]DiscReason
// This is the last message. We don't need to discard or