Changeset 160ee4c for benchmark

Timestamp:

May 3, 2022, 12:52:24 PM (3 years ago)

Author:

Thierry Delisle <tdelisle@…>

Branches:

ADT, ast-experimental, master, pthread-emulation, qualifiedEnum

Children:

db89655

Parents:

f56101f

Message:

Fix churn.go to use channels instead of semaphores.

File:

• benchmark/readyQ/churn.go (modified) (4 diffs)

benchmark/readyQ/churn.go

@@ -2 +2 @@
 
 import (
-        "context"
         "flag"
         "fmt"
         "math/rand"
+        "runtime"
         "sync"
         "sync/atomic"
         "time"
-        "golang.org/x/sync/semaphore"
         "golang.org/x/text/language"
         "golang.org/x/text/message"
 )
 
-func churner(result chan uint64, start *sync.WaitGroup, skip bool, spots [] * semaphore.Weighted) {
-        ctx := context.TODO()
+func churner(result chan uint64, start *sync.WaitGroup, spots [] chan struct {}) {
         s := rand.NewSource(time.Now().UnixNano())
         rng := rand.New(s)
@@ -24 +22 @@
 
                 sem := spots[ rng.Intn(100) % len(spots) ];
-                if !skip { sem.Release(1); };
-                sem.Acquire(ctx,1);
-                skip = false;
+                sem <- (struct {}{})
+                <- sem;
 
                 count += 1
@@ -52 +49 @@
         wg.Add(1)
 
-        spots := make([] * semaphore.Weighted, spot_cnt)
+        spots := make([] chan struct {}, spot_cnt)
         for i := range spots {
-                ctx := context.TODO()
-                spots[i] = semaphore.NewWeighted(20000)
-                spots[i].Acquire(ctx, 20000)
+                spots[i] = make(chan struct {}, 1)
         }
 
         for i := 0; i < nthreads; i++ {
-                go churner(result, &wg, i < len(spots), spots)
+                go churner(result, &wg, spots)
         }
         fmt.Printf("Starting\n");
@@ -74 +69 @@
         fmt.Printf("\nDone\n")
 
-        for i := range spots {
-                spots[i].Release(10000)
+        for atomic.LoadInt64(&threads_left) != 0 {
+                for i := range spots {
+                        select {
+                        case spots[i] <- (struct {}{}):
+                        default:
+                        }
+                        runtime.Gosched()
+                }
         }