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Change-Id: If8d2d4289ea3c0f951018115cb5652d6f0f7a43f

Author: qiulaidongfeng

src/cmd/dist/test.go

@@ -1305,7 +1305,7 @@ func (t *tester) runPending(nextTest *distTest) {
 
 	// for runtime.NumCPU() > 4 , do not change maxbg.
 	// Because there is not enough CPU to parallel the testing of multiple packages.
-	if runtime.NumCPU() > 4 {
+	if runtime.NumCPU() > 4 && runtime.GOMAXPROCS(0) != 1 {
 		for _, w := range worklist {
 			// because GOMAXPROCS=2 runtime CPU usage is low,
 			// so increase maxbg to avoid slowing down execution with low CPU usage.