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https://github.com/syncthing/syncthing.git
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Faster puller loop
This commit is contained in:
Jakob Borg
parent
2aa4340551
commit
5087d02fba
@ -4,11 +4,7 @@
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package model
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import (
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"sync"
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"github.com/calmh/syncthing/protocol"
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)
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import "github.com/calmh/syncthing/protocol"
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type bqAdd struct {
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file protocol.FileInfo
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@ -25,27 +21,10 @@ type bqBlock struct {
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}
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type blockQueue struct {
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inbox chan bqAdd
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outbox chan bqBlock
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queued []bqBlock
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mut sync.Mutex
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}
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func newBlockQueue() *blockQueue {
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q := &blockQueue{
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inbox: make(chan bqAdd),
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outbox: make(chan bqBlock),
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}
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go q.run()
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return q
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}
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func (q *blockQueue) addBlock(a bqAdd) {
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q.mut.Lock()
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defer q.mut.Unlock()
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func (q *blockQueue) put(a bqAdd) {
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// If we already have it queued, return
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for _, b := range q.queued {
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if b.file.Name == a.file.Name {
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@ -84,36 +63,11 @@ func (q *blockQueue) addBlock(a bqAdd) {
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}
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}
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func (q *blockQueue) run() {
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for {
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if len(q.queued) == 0 {
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q.addBlock(<-q.inbox)
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} else {
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q.mut.Lock()
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next := q.queued[0]
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q.mut.Unlock()
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select {
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case a := <-q.inbox:
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q.addBlock(a)
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case q.outbox <- next:
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q.mut.Lock()
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q.queued = q.queued[1:]
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q.mut.Unlock()
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}
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}
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func (q *blockQueue) get() (bqBlock, bool) {
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if len(q.queued) == 0 {
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return bqBlock{}, false
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}
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}
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func (q *blockQueue) put(a bqAdd) {
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q.inbox <- a
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}
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func (q *blockQueue) get() bqBlock {
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return <-q.outbox
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}
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func (q *blockQueue) empty() bool {
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q.mut.Lock()
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defer q.mut.Unlock()
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return len(q.queued) == 0
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b := q.queued[0]
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q.queued = q.queued[1:]
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return b, true
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}
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@ -584,8 +584,10 @@ func sendIndexes(conn protocol.Connection, repo string, fs *files.Set) {
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}()
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for err == nil {
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if !initial && fs.LocalVersion(protocol.LocalNodeID) <= minLocalVer {
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time.Sleep(1 * time.Second)
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if !initial {
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time.Sleep(5 * time.Second)
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}
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if fs.LocalVersion(protocol.LocalNodeID) <= minLocalVer {
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continue
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}
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138
model/puller.go
138
model/puller.go
@ -63,7 +63,8 @@ var errNoNode = errors.New("no available source node")
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type puller struct {
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cfg *config.Configuration
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repoCfg config.RepositoryConfiguration
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bq *blockQueue
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bq blockQueue
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slots int
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model *Model
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oustandingPerNode activityMap
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openFiles map[string]openFile
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@ -75,9 +76,9 @@ type puller struct {
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func newPuller(repoCfg config.RepositoryConfiguration, model *Model, slots int, cfg *config.Configuration) *puller {
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p := &puller{
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repoCfg: repoCfg,
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cfg: cfg,
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bq: newBlockQueue(),
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repoCfg: repoCfg,
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slots: slots,
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model: model,
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oustandingPerNode: make(activityMap),
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openFiles: make(map[string]openFile),
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@ -96,9 +97,6 @@ func newPuller(repoCfg config.RepositoryConfiguration, model *Model, slots int,
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if slots > 0 {
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// Read/write
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for i := 0; i < slots; i++ {
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p.requestSlots <- true
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}
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if debug {
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l.Debugf("starting puller; repo %q dir %q slots %d", repoCfg.ID, repoCfg.Directory, slots)
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}
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@ -114,57 +112,70 @@ func newPuller(repoCfg config.RepositoryConfiguration, model *Model, slots int,
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}
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func (p *puller) run() {
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go func() {
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// fill blocks queue when there are free slots
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for {
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<-p.requestSlots
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b := p.bq.get()
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if debug {
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l.Debugf("filler: queueing %q / %q offset %d copy %d", p.repoCfg.ID, b.file.Name, b.block.Offset, len(b.copy))
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}
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p.blocks <- b
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}
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}()
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timeout := time.Tick(5 * time.Second)
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changed := true
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scanintv := time.Duration(p.cfg.Options.RescanIntervalS) * time.Second
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lastscan := time.Now()
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var prevVer uint64
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var queued int
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// Load up the request slots
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for i := 0; i < cap(p.requestSlots); i++ {
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p.requestSlots <- true
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}
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for {
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// Run the pulling loop as long as there are blocks to fetch
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pull:
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for {
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select {
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case res := <-p.requestResults:
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p.model.setState(p.repoCfg.ID, RepoSyncing)
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changed = true
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p.requestSlots <- true
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p.handleRequestResult(res)
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case b := <-p.blocks:
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p.model.setState(p.repoCfg.ID, RepoSyncing)
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changed = true
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if p.handleBlock(b) {
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// Block was fully handled, free up the slot
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prevVer, queued = p.queueNeededBlocks(prevVer)
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if queued > 0 {
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pull:
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for {
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select {
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case res := <-p.requestResults:
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p.model.setState(p.repoCfg.ID, RepoSyncing)
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changed = true
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p.requestSlots <- true
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}
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p.handleRequestResult(res)
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case <-timeout:
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if len(p.openFiles) == 0 && p.bq.empty() {
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// Nothing more to do for the moment
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break pull
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}
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if debug {
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l.Debugf("%q: idle but have %d open files", p.repoCfg.ID, len(p.openFiles))
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i := 5
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for _, f := range p.openFiles {
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l.Debugf(" %v", f)
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i--
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if i == 0 {
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break
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case <-p.requestSlots:
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b, ok := p.bq.get()
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if !ok {
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if debug {
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l.Debugf("%q: pulling loop needs more blocks", p.repoCfg.ID)
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}
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prevVer, _ = p.queueNeededBlocks(prevVer)
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b, ok = p.bq.get()
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}
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if !ok && len(p.openFiles) == 0 {
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// Nothing queued, nothing outstanding
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if debug {
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l.Debugf("%q: pulling loop done", p.repoCfg.ID)
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}
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break pull
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}
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if !ok {
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// Nothing queued, but there are still open files.
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// Give the situation a moment to change.
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if debug {
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l.Debugf("%q: pulling loop paused", p.repoCfg.ID)
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}
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p.requestSlots <- true
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time.Sleep(100 * time.Millisecond)
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continue pull
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}
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if debug {
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l.Debugf("queueing %q / %q offset %d copy %d", p.repoCfg.ID, b.file.Name, b.block.Offset, len(b.copy))
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}
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p.model.setState(p.repoCfg.ID, RepoSyncing)
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changed = true
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if p.handleBlock(b) {
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// Block was fully handled, free up the slot
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p.requestSlots <- true
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}
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}
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}
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@ -192,19 +203,7 @@ func (p *puller) run() {
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lastscan = time.Now()
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}
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if v := p.model.LocalVersion(p.repoCfg.ID); v != prevVer {
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if debug {
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l.Debugf("%q: checking for more needed blocks", p.repoCfg.ID)
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}
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// Queue more blocks to fetch, if any
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if p.queueNeededBlocks() == 0 {
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if debug {
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l.Debugf("%q: no more needed blocks", p.repoCfg.ID)
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}
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// We've fetched all blocks we need
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prevVer = v
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}
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}
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time.Sleep(5 * time.Second)
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}
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}
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@ -620,9 +619,21 @@ func (p *puller) handleEmptyBlock(b bqBlock) {
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delete(p.openFiles, f.Name)
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}
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func (p *puller) queueNeededBlocks() int {
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func (p *puller) queueNeededBlocks(prevVer uint64) (uint64, int) {
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curVer := p.model.LocalVersion(p.repoCfg.ID)
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if curVer == prevVer {
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return curVer, 0
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}
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if debug {
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l.Debugf("%q: checking for more needed blocks", p.repoCfg.ID)
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}
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queued := 0
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for _, f := range p.model.NeedFilesRepo(p.repoCfg.ID) {
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if _, ok := p.openFiles[f.Name]; ok {
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continue
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}
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lf := p.model.CurrentRepoFile(p.repoCfg.ID, f.Name)
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have, need := scanner.BlockDiff(lf.Blocks, f.Blocks)
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if debug {
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@ -638,7 +649,12 @@ func (p *puller) queueNeededBlocks() int {
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if debug && queued > 0 {
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l.Debugf("%q: queued %d items", p.repoCfg.ID, queued)
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}
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return queued
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if queued > 0 {
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return prevVer, queued
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} else {
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return curVer, 0
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}
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}
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func (p *puller) closeFile(f protocol.FileInfo) {
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