Merge pull request #13 from liyonglion/master

解决死循环导致cpu占用率过高

ants_benchmark_test.go

@@ -27,7 +27,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/panjf2000/ants"
+	"github.com/liyonglion/ants"
 )
 
 const (
@@ -42,9 +42,9 @@ const (
 	YiB // 1208925819614629174706176
 )
 const (
-	RunTimes = 10000000
+	RunTimes = 1000000
 	Param    = 100
-	AntsSize = 1000
+	AntsSize = 50000
 	TestSize = 10000
 )
 
@@ -68,6 +68,7 @@ func demoPoolFunc(args interface{}) error {
 
 func BenchmarkGoroutineWithFunc(b *testing.B) {
 	var wg sync.WaitGroup
+
 	for i := 0; i < b.N; i++ {
 		for j := 0; j < RunTimes; j++ {
 			wg.Add(1)
@@ -96,7 +97,7 @@ func BenchmarkAntsPoolWithFunc(b *testing.B) {
 			p.Serve(Param)
 		}
 		wg.Wait()
-		b.Logf("running goroutines: %d", p.Running())
+		//b.Logf("running goroutines: %d", p.Running())
 	}
 }
 
@@ -111,7 +112,6 @@ func BenchmarkGoroutine(b *testing.B) {
 func BenchmarkAntsPool(b *testing.B) {
 	p, _ := ants.NewPoolWithFunc(AntsSize, demoPoolFunc)
 	defer p.Release()
-
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
 		for j := 0; j < RunTimes; j++ {

ants_test.go

@@ -28,7 +28,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/panjf2000/ants"
+	"github.com/liyonglion/ants"
 )
 
 var n = 100000

pool.go

@@ -52,7 +52,7 @@ type Pool struct {
 
 	// lock for synchronous operation.
 	lock sync.Mutex
-
+	cond *sync.Cond
 	once sync.Once
 }
 
@@ -105,6 +105,7 @@ func NewTimingPool(size, expiry int) (*Pool, error) {
 		release:        make(chan sig, 1),
 		expiryDuration: time.Duration(expiry) * time.Second,
 	}
+	p.cond = sync.NewCond(&p.lock)
 	go p.periodicallyPurge()
 	return p, nil
 }
@@ -183,6 +184,7 @@ func (p *Pool) getWorker() *Worker {
 	waiting := false
 
 	p.lock.Lock()
+	defer p.lock.Unlock()
 	idleWorkers := p.workers
 	n := len(idleWorkers) - 1
 	if n < 0 {
@@ -192,21 +194,17 @@ func (p *Pool) getWorker() *Worker {
 		idleWorkers[n] = nil
 		p.workers = idleWorkers[:n]
 	}
-	p.lock.Unlock()
 
 	if waiting {
-		for {
-			p.lock.Lock()
-			idleWorkers = p.workers
-			l := len(idleWorkers) - 1
-			if l < 0 {
-				p.lock.Unlock()
+		for{
+			p.cond.Wait()
+			l := len(p.workers) - 1
+			if l < 0{
 				continue
 			}
-			w = idleWorkers[l]
-			idleWorkers[l] = nil
-			p.workers = idleWorkers[:l]
-			p.lock.Unlock()
+			w = p.workers[l]
+			p.workers[l] = nil
+			p.workers = p.workers[:l]
 			break
 		}
 	} else if w == nil {
@@ -225,5 +223,7 @@ func (p *Pool) putWorker(worker *Worker) {
 	worker.recycleTime = time.Now()
 	p.lock.Lock()
 	p.workers = append(p.workers, worker)
+	//通知有一个空闲的worker
+	p.cond.Signal()
 	p.lock.Unlock()
 }

pool_func.go

@@ -50,7 +50,7 @@ type PoolWithFunc struct {
 
 	// lock for synchronous operation.
 	lock sync.Mutex
-
+	cond *sync.Cond
 	// pf is the function for processing tasks.
 	poolFunc pf
 
@@ -107,6 +107,7 @@ func NewTimingPoolWithFunc(size, expiry int, f pf) (*PoolWithFunc, error) {
 		expiryDuration: time.Duration(expiry) * time.Second,
 		poolFunc:       f,
 	}
+	p.cond = sync.NewCond(&p.lock)
 	go p.periodicallyPurge()
 	return p, nil
 }
@@ -185,6 +186,7 @@ func (p *PoolWithFunc) getWorker() *WorkerWithFunc {
 	waiting := false
 
 	p.lock.Lock()
+	defer p.lock.Unlock()
 	idleWorkers := p.workers
 	n := len(idleWorkers) - 1
 	if n < 0 {
@@ -194,23 +196,20 @@ func (p *PoolWithFunc) getWorker() *WorkerWithFunc {
 		idleWorkers[n] = nil
 		p.workers = idleWorkers[:n]
 	}
-	p.lock.Unlock()
 
 	if waiting {
-		for {
-			p.lock.Lock()
-			idleWorkers = p.workers
-			l := len(idleWorkers) - 1
-			if l < 0 {
-				p.lock.Unlock()
+		for{
+			p.cond.Wait()
+			l := len(p.workers) - 1
+			if l < 0{
 				continue
 			}
-			w = idleWorkers[l]
-			idleWorkers[l] = nil
-			p.workers = idleWorkers[:l]
-			p.lock.Unlock()
+			w = p.workers[l]
+			p.workers[l] = nil
+			p.workers = p.workers[:l]
 			break
 		}
+
 	} else if w == nil {
 		w = &WorkerWithFunc{
 			pool: p,
@@ -227,5 +226,7 @@ func (p *PoolWithFunc) putWorker(worker *WorkerWithFunc) {
 	worker.recycleTime = time.Now()
 	p.lock.Lock()
 	p.workers = append(p.workers, worker)
+	//通知有一个空闲的worker
+	p.cond.Signal()
 	p.lock.Unlock()
 }