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Patch for concurrent iterator & others (onto v1.11.6) #386

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roysc wants to merge 1565 commits from v1.11.6-statediff-v5 into master
pull from: v1.11.6-statediff-v5
merge into: cerc-io:master
Conversation 0 Commits 1565 Files Changed 1471 +100 -7
1 changed files with 100 additions and 7 deletions
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107
eth/protocols/snap/sync.go
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@ -21,10 +21,12 @@ import (
"encoding/json"
"errors"
"fmt"
gomath "math"
"math/big"
"math/rand"
"sort"
"sync"
"sync/atomic"
"time"
"github.com/ethereum/go-ethereum/common"
@ -78,6 +80,29 @@ const (
// and waste round trip times. If it's too high, we're capping responses and
// waste bandwidth.
maxTrieRequestCount = maxRequestSize / 512
// trienodeHealRateMeasurementImpact is the impact a single measurement has on
// the local node's trienode processing capacity. A value closer to 0 reacts
// slower to sudden changes, but it is also more stable against temporary hiccups.
trienodeHealRateMeasurementImpact = 0.005
// minTrienodeHealThrottle is the minimum divisor for throttling trie node
// heal requests to avoid overloading the local node and exessively expanding
// the state trie bedth wise.
minTrienodeHealThrottle = 1
// maxTrienodeHealThrottle is the maximum divisor for throttling trie node
// heal requests to avoid overloading the local node and exessively expanding
// the state trie bedth wise.
maxTrienodeHealThrottle = maxTrieRequestCount
// trienodeHealThrottleIncrease is the multiplier for the throttle when the
// rate of arriving data is higher than the rate of processing it.
trienodeHealThrottleIncrease = 1.33
// trienodeHealThrottleDecrease is the divisor for the throttle when the
// rate of arriving data is lower than the rate of processing it.
trienodeHealThrottleDecrease = 1.25
)
var (
@ -431,6 +456,11 @@ type Syncer struct {
trienodeHealReqs map[uint64]*trienodeHealRequest // Trie node requests currently running
bytecodeHealReqs map[uint64]*bytecodeHealRequest // Bytecode requests currently running
trienodeHealRate float64 // Average heal rate for processing trie node data
trienodeHealPend uint64 // Number of trie nodes currently pending for processing
trienodeHealThrottle float64 // Divisor for throttling the amount of trienode heal data requested
trienodeHealThrottled time.Time // Timestamp the last time the throttle was updated
trienodeHealSynced uint64 // Number of state trie nodes downloaded
trienodeHealBytes common.StorageSize // Number of state trie bytes persisted to disk
trienodeHealDups uint64 // Number of state trie nodes already processed
@ -476,9 +506,10 @@ func NewSyncer(db ethdb.KeyValueStore) *Syncer {
trienodeHealIdlers: make(map[string]struct{}),
bytecodeHealIdlers: make(map[string]struct{}),
trienodeHealReqs: make(map[uint64]*trienodeHealRequest),
bytecodeHealReqs: make(map[uint64]*bytecodeHealRequest),
stateWriter: db.NewBatch(),
trienodeHealReqs: make(map[uint64]*trienodeHealRequest),
bytecodeHealReqs: make(map[uint64]*bytecodeHealRequest),
trienodeHealThrottle: maxTrienodeHealThrottle, // Tune downward instead of insta-filling with junk
stateWriter: db.NewBatch(),
extProgress: new(SyncProgress),
}
@ -1321,6 +1352,10 @@ func (s *Syncer) assignTrienodeHealTasks(success chan *trienodeHealResponse, fai
if cap > maxTrieRequestCount {
cap = maxTrieRequestCount
}
cap = int(float64(cap) / s.trienodeHealThrottle)
if cap <= 0 {
cap = 1
}
var (
hashes = make([]common.Hash, 0, cap)
paths = make([]string, 0, cap)
@ -2090,6 +2125,10 @@ func (s *Syncer) processStorageResponse(res *storageResponse) {
// processTrienodeHealResponse integrates an already validated trienode response
// into the healer tasks.
func (s *Syncer) processTrienodeHealResponse(res *trienodeHealResponse) {
var (
start = time.Now()
fills int
)
for i, hash := range res.hashes {
node := res.nodes[i]
@ -2098,6 +2137,8 @@ func (s *Syncer) processTrienodeHealResponse(res *trienodeHealResponse) {
res.task.trieTasks[res.paths[i]] = res.hashes[i]
continue
}
fills++
// Push the trie node into the state syncer
s.trienodeHealSynced++
s.trienodeHealBytes += common.StorageSize(len(node))
@ -2121,6 +2162,50 @@ func (s *Syncer) processTrienodeHealResponse(res *trienodeHealResponse) {
log.Crit("Failed to persist healing data", "err", err)
}
log.Debug("Persisted set of healing data", "type", "trienodes", "bytes", common.StorageSize(batch.ValueSize()))
// Calculate the processing rate of one filled trie node
rate := float64(fills) / (float64(time.Since(start)) / float64(time.Second))
// Update the currently measured trienode queueing and processing throughput.
//
// The processing rate needs to be updated uniformly independent if we've
// processed 1x100 trie nodes or 100x1 to keep the rate consistent even in
// the face of varying network packets. As such, we cannot just measure the
// time it took to process N trie nodes and update once, we need one update
// per trie node.
//
// Naively, that would be:
//
// for i:=0; i<fills; i++ {
// healRate = (1-measurementImpact)*oldRate + measurementImpact*newRate
// }
//
// Essentially, a recursive expansion of HR = (1-MI)*HR + MI*NR.
//
// We can expand that formula for the Nth item as:
// HR(N) = (1-MI)^N*OR + (1-MI)^(N-1)*MI*NR + (1-MI)^(N-2)*MI*NR + ... + (1-MI)^0*MI*NR
//
// The above is a geometric sequence that can be summed to:
// HR(N) = (1-MI)^N*(OR-NR) + NR
s.trienodeHealRate = gomath.Pow(1-trienodeHealRateMeasurementImpact, float64(fills))*(s.trienodeHealRate-rate) + rate
pending := atomic.LoadUint64(&s.trienodeHealPend)
if time.Since(s.trienodeHealThrottled) > time.Second {
// Periodically adjust the trie node throttler
if float64(pending) > 2*s.trienodeHealRate {
s.trienodeHealThrottle *= trienodeHealThrottleIncrease
} else {
s.trienodeHealThrottle /= trienodeHealThrottleDecrease
}
if s.trienodeHealThrottle > maxTrienodeHealThrottle {
s.trienodeHealThrottle = maxTrienodeHealThrottle
} else if s.trienodeHealThrottle < minTrienodeHealThrottle {
s.trienodeHealThrottle = minTrienodeHealThrottle
}
s.trienodeHealThrottled = time.Now()
log.Debug("Updated trie node heal throttler", "rate", s.trienodeHealRate, "pending", pending, "throttle", s.trienodeHealThrottle)
}
}
// processBytecodeHealResponse integrates an already validated bytecode response
@ -2655,10 +2740,12 @@ func (s *Syncer) OnTrieNodes(peer SyncPeer, id uint64, trienodes [][]byte) error
// Cross reference the requested trienodes with the response to find gaps
// that the serving node is missing
hasher := sha3.NewLegacyKeccak256().(crypto.KeccakState)
hash := make([]byte, 32)
nodes := make([][]byte, len(req.hashes))
var (
hasher = sha3.NewLegacyKeccak256().(crypto.KeccakState)
hash = make([]byte, 32)
nodes = make([][]byte, len(req.hashes))
fills uint64
)
for i, j := 0, 0; i < len(trienodes); i++ {
// Find the next hash that we've been served, leaving misses with nils
hasher.Reset()
@ -2670,16 +2757,22 @@ func (s *Syncer) OnTrieNodes(peer SyncPeer, id uint64, trienodes [][]byte) error
}
if j < len(req.hashes) {
nodes[j] = trienodes[i]
fills++
j++
continue
}
// We've either ran out of hashes, or got unrequested data
logger.Warn("Unexpected healing trienodes", "count", len(trienodes)-i)
// Signal this request as failed, and ready for rescheduling
s.scheduleRevertTrienodeHealRequest(req)
return errors.New("unexpected healing trienode")
}
// Response validated, send it to the scheduler for filling
atomic.AddUint64(&s.trienodeHealPend, fills)
defer func() {
atomic.AddUint64(&s.trienodeHealPend, ^(fills - 1))
}()
response := &trienodeHealResponse{
paths: req.paths,
task: req.task,