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https://github.com/ipfs/kubo.git
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c84a714b16
this is a major refactor of the entire codebase it changes the monolithic peer.Peer into using a peer.ID and a peer.Peerstore. Other changes: - removed handshake3. - testutil vastly simplified peer - secio bugfix + debugging logs - testutil: RandKeyPair - backpressure bugfix: w.o.w. - peer: added hex enc/dec - peer: added a PeerInfo struct PeerInfo is a small struct used to pass around a peer with a set of addresses and keys. This is not meant to be a complete view of the system, but rather to model updates to the peerstore. It is used by things like the routing system. - updated peer/queue + peerset - latency metrics - testutil: use crand for PeerID gen RandPeerID generates random "valid" peer IDs. it does not NEED to generate keys because it is as if we lost the key right away. fine to read some randomness and hash it. to generate proper keys and an ID, use: sk, pk, _ := testutil.RandKeyPair() id, _ := peer.IDFromPublicKey(pk) Also added RandPeerIDFatal helper - removed old spipe - updated seccat - core: cleanup initIdentity - removed old getFromPeerList
64 lines
1.4 KiB
Go
64 lines
1.4 KiB
Go
package peer
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import (
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"sync"
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"time"
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)
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// LatencyEWMASmooting governs the decay of the EWMA (the speed
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// at which it changes). This must be a normalized (0-1) value.
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// 1 is 100% change, 0 is no change.
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var LatencyEWMASmoothing = 0.1
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// Metrics is just an object that tracks metrics
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// across a set of peers.
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type Metrics interface {
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// RecordLatency records a new latency measurement
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RecordLatency(ID, time.Duration)
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// LatencyEWMA returns an exponentially-weighted moving avg.
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// of all measurements of a peer's latency.
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LatencyEWMA(ID) time.Duration
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}
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type metrics struct {
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latmap map[ID]time.Duration
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latmu sync.RWMutex
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}
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func NewMetrics() Metrics {
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return &metrics{
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latmap: make(map[ID]time.Duration),
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}
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}
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// RecordLatency records a new latency measurement
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func (m *metrics) RecordLatency(p ID, next time.Duration) {
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nextf := float64(next)
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s := LatencyEWMASmoothing
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if s > 1 || s < 0 {
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s = 0.1 // ignore the knob. it's broken. look, it jiggles.
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}
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m.latmu.Lock()
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ewma, found := m.latmap[p]
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ewmaf := float64(ewma)
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if !found {
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m.latmap[p] = next // when no data, just take it as the mean.
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} else {
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nextf = ((1.0 - s) * ewmaf) + (s * nextf)
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m.latmap[p] = time.Duration(nextf)
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}
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m.latmu.Unlock()
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}
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// LatencyEWMA returns an exponentially-weighted moving avg.
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// of all measurements of a peer's latency.
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func (m *metrics) LatencyEWMA(p ID) time.Duration {
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m.latmu.RLock()
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lat := m.latmap[p]
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m.latmu.RUnlock()
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return time.Duration(lat)
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}
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