mirror of
https://github.com/minio/minio.git
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eafa775952
- Add owner information for expiry, locking, unlocking a resource - TopLocks returns now locks in quorum by default, provides a way to capture stale locks as well with `?stale=true` - Simplify the quorum handling for locks to avoid from storage class, because there were challenges to make it consistent across all situations. - And other tiny simplifications to reset locks.
363 lines
7.8 KiB
Go
363 lines
7.8 KiB
Go
/*
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* Minio Cloud Storage, (C) 2016 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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// GOMAXPROCS=10 go test
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package dsync_test
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import (
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"fmt"
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"log"
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"math/rand"
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"net"
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"net/http"
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"net/rpc"
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"os"
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"strconv"
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"sync"
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"testing"
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"time"
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"github.com/google/uuid"
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. "github.com/minio/minio/pkg/dsync"
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)
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var ds *Dsync
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var rpcPaths []string // list of rpc paths where lock server is serving.
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func startRPCServers(nodes []string) {
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for i := range nodes {
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server := rpc.NewServer()
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server.RegisterName("Dsync", &lockServer{
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mutex: sync.Mutex{},
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lockMap: make(map[string]int64),
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})
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// For some reason the registration paths need to be different (even for different server objs)
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server.HandleHTTP(rpcPaths[i], fmt.Sprintf("%s-debug", rpcPaths[i]))
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l, e := net.Listen("tcp", ":"+strconv.Itoa(i+12345))
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if e != nil {
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log.Fatal("listen error:", e)
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}
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go http.Serve(l, nil)
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}
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// Let servers start
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time.Sleep(10 * time.Millisecond)
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}
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// TestMain initializes the testing framework
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func TestMain(m *testing.M) {
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const rpcPath = "/dsync"
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rand.Seed(time.Now().UTC().UnixNano())
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nodes := make([]string, 5) // list of node IP addrs or hostname with ports.
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for i := range nodes {
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nodes[i] = fmt.Sprintf("127.0.0.1:%d", i+12345)
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}
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for i := range nodes {
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rpcPaths = append(rpcPaths, rpcPath+"-"+strconv.Itoa(i))
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}
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// Initialize net/rpc clients for dsync.
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var clnts []NetLocker
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for i := 0; i < len(nodes); i++ {
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clnts = append(clnts, newClient(nodes[i], rpcPaths[i]))
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}
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ds = &Dsync{
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GetLockers: func() ([]NetLocker, string) { return clnts, uuid.New().String() },
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}
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startRPCServers(nodes)
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os.Exit(m.Run())
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}
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func TestSimpleLock(t *testing.T) {
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dm := NewDRWMutex(ds, "test")
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dm.Lock(id, source)
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// fmt.Println("Lock acquired, waiting...")
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time.Sleep(2500 * time.Millisecond)
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dm.Unlock()
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}
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func TestSimpleLockUnlockMultipleTimes(t *testing.T) {
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dm := NewDRWMutex(ds, "test")
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dm.Lock(id, source)
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time.Sleep(time.Duration(10+(rand.Float32()*50)) * time.Millisecond)
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dm.Unlock()
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dm.Lock(id, source)
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time.Sleep(time.Duration(10+(rand.Float32()*50)) * time.Millisecond)
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dm.Unlock()
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dm.Lock(id, source)
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time.Sleep(time.Duration(10+(rand.Float32()*50)) * time.Millisecond)
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dm.Unlock()
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dm.Lock(id, source)
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time.Sleep(time.Duration(10+(rand.Float32()*50)) * time.Millisecond)
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dm.Unlock()
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dm.Lock(id, source)
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time.Sleep(time.Duration(10+(rand.Float32()*50)) * time.Millisecond)
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dm.Unlock()
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}
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// Test two locks for same resource, one succeeds, one fails (after timeout)
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func TestTwoSimultaneousLocksForSameResource(t *testing.T) {
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dm1st := NewDRWMutex(ds, "aap")
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dm2nd := NewDRWMutex(ds, "aap")
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dm1st.Lock(id, source)
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// Release lock after 10 seconds
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go func() {
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time.Sleep(10 * time.Second)
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// fmt.Println("Unlocking dm1")
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dm1st.Unlock()
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}()
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dm2nd.Lock(id, source)
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// fmt.Printf("2nd lock obtained after 1st lock is released\n")
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time.Sleep(2500 * time.Millisecond)
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dm2nd.Unlock()
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}
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// Test three locks for same resource, one succeeds, one fails (after timeout)
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func TestThreeSimultaneousLocksForSameResource(t *testing.T) {
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dm1st := NewDRWMutex(ds, "aap")
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dm2nd := NewDRWMutex(ds, "aap")
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dm3rd := NewDRWMutex(ds, "aap")
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dm1st.Lock(id, source)
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// Release lock after 10 seconds
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go func() {
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time.Sleep(10 * time.Second)
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// fmt.Println("Unlocking dm1")
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dm1st.Unlock()
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}()
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var wg sync.WaitGroup
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wg.Add(2)
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go func() {
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defer wg.Done()
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dm2nd.Lock(id, source)
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// Release lock after 10 seconds
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go func() {
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time.Sleep(2500 * time.Millisecond)
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// fmt.Println("Unlocking dm2")
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dm2nd.Unlock()
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}()
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dm3rd.Lock(id, source)
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// fmt.Printf("3rd lock obtained after 1st & 2nd locks are released\n")
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time.Sleep(2500 * time.Millisecond)
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dm3rd.Unlock()
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}()
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go func() {
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defer wg.Done()
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dm3rd.Lock(id, source)
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// Release lock after 10 seconds
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go func() {
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time.Sleep(2500 * time.Millisecond)
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// fmt.Println("Unlocking dm3")
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dm3rd.Unlock()
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}()
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dm2nd.Lock(id, source)
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// fmt.Printf("2nd lock obtained after 1st & 3rd locks are released\n")
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time.Sleep(2500 * time.Millisecond)
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dm2nd.Unlock()
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}()
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wg.Wait()
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}
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// Test two locks for different resources, both succeed
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func TestTwoSimultaneousLocksForDifferentResources(t *testing.T) {
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dm1 := NewDRWMutex(ds, "aap")
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dm2 := NewDRWMutex(ds, "noot")
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dm1.Lock(id, source)
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dm2.Lock(id, source)
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// fmt.Println("Both locks acquired, waiting...")
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time.Sleep(2500 * time.Millisecond)
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dm1.Unlock()
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dm2.Unlock()
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time.Sleep(10 * time.Millisecond)
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}
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// Borrowed from mutex_test.go
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func HammerMutex(m *DRWMutex, loops int, cdone chan bool) {
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for i := 0; i < loops; i++ {
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m.Lock(id, source)
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m.Unlock()
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}
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cdone <- true
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}
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// Borrowed from mutex_test.go
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func TestMutex(t *testing.T) {
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loops := 200
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if testing.Short() {
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loops = 5
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}
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c := make(chan bool)
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m := NewDRWMutex(ds, "test")
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for i := 0; i < 10; i++ {
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go HammerMutex(m, loops, c)
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}
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for i := 0; i < 10; i++ {
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<-c
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}
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}
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func BenchmarkMutexUncontended(b *testing.B) {
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type PaddedMutex struct {
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*DRWMutex
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}
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b.RunParallel(func(pb *testing.PB) {
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var mu = PaddedMutex{NewDRWMutex(ds, "")}
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for pb.Next() {
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mu.Lock(id, source)
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mu.Unlock()
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}
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})
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}
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func benchmarkMutex(b *testing.B, slack, work bool) {
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mu := NewDRWMutex(ds, "")
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if slack {
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b.SetParallelism(10)
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}
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b.RunParallel(func(pb *testing.PB) {
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foo := 0
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for pb.Next() {
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mu.Lock(id, source)
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mu.Unlock()
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if work {
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for i := 0; i < 100; i++ {
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foo *= 2
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foo /= 2
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}
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}
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}
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_ = foo
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})
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}
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func BenchmarkMutex(b *testing.B) {
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benchmarkMutex(b, false, false)
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}
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func BenchmarkMutexSlack(b *testing.B) {
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benchmarkMutex(b, true, false)
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}
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func BenchmarkMutexWork(b *testing.B) {
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benchmarkMutex(b, false, true)
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}
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func BenchmarkMutexWorkSlack(b *testing.B) {
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benchmarkMutex(b, true, true)
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}
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func BenchmarkMutexNoSpin(b *testing.B) {
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// This benchmark models a situation where spinning in the mutex should be
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// non-profitable and allows to confirm that spinning does not do harm.
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// To achieve this we create excess of goroutines most of which do local work.
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// These goroutines yield during local work, so that switching from
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// a blocked goroutine to other goroutines is profitable.
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// As a matter of fact, this benchmark still triggers some spinning in the mutex.
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m := NewDRWMutex(ds, "")
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var acc0, acc1 uint64
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b.SetParallelism(4)
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b.RunParallel(func(pb *testing.PB) {
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c := make(chan bool)
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var data [4 << 10]uint64
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for i := 0; pb.Next(); i++ {
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if i%4 == 0 {
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m.Lock(id, source)
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acc0 -= 100
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acc1 += 100
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m.Unlock()
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} else {
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for i := 0; i < len(data); i += 4 {
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data[i]++
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}
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// Elaborate way to say runtime.Gosched
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// that does not put the goroutine onto global runq.
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go func() {
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c <- true
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}()
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<-c
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}
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}
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})
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}
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func BenchmarkMutexSpin(b *testing.B) {
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// This benchmark models a situation where spinning in the mutex should be
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// profitable. To achieve this we create a goroutine per-proc.
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// These goroutines access considerable amount of local data so that
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// unnecessary rescheduling is penalized by cache misses.
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m := NewDRWMutex(ds, "")
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var acc0, acc1 uint64
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b.RunParallel(func(pb *testing.PB) {
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var data [16 << 10]uint64
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for i := 0; pb.Next(); i++ {
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m.Lock(id, source)
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acc0 -= 100
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acc1 += 100
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m.Unlock()
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for i := 0; i < len(data); i += 4 {
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data[i]++
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}
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}
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})
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}
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