add test case

lib/streamaggr/max.go

@@ -1,9 +1,10 @@
 package streamaggr
 
 import (
+	"fmt"
 	"sync"
-
-	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
+	"time"
+	// "github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
 )
 
 // maxAggrState calculates output=max, e.g. the maximum value over input samples.
@@ -29,19 +30,22 @@ func (as *maxAggrState) pushSamples(samples []pushSample) {
 	again:
 		v, ok := as.m.Load(outputKey)
 		if !ok {
+			fmt.Printf("wang The entry is missing in the map: %d\n", time.Now().UnixMicro())
 			// The entry is missing in the map. Try creating it.
 			v = &maxStateValue{
 				max: s.value,
 			}
-			outputKey = bytesutil.InternString(outputKey)
+			// outputKey = bytesutil.InternString(outputKey)
 			vNew, loaded := as.m.LoadOrStore(outputKey, v)
 			if !loaded {
+				fmt.Printf("wang new entry has been successfully created: %d\n", time.Now().UnixMicro())
 				// The new entry has been successfully created.
 				continue
 			}
 			// Use the entry created by a concurrent goroutine.
 			v = vNew
 		}
+		fmt.Printf("wang the right way %d\n", time.Now().Unix())
 		sv := v.(*maxStateValue)
 		sv.mu.Lock()
 		deleted := sv.deleted
@@ -57,13 +61,22 @@ func (as *maxAggrState) pushSamples(samples []pushSample) {
 			goto again
 		}
 	}
+	length := 0
+    as.m.Range(func(_, _ interface{}) bool {
+        length++
+        return true
+    })
+	fmt.Printf("wang sync map length %d\n", length)
 }
 
 func (as *maxAggrState) flushState(ctx *flushCtx) {
 	m := &as.m
+	// fmt.Println("Im outside %d", time.Now().Unix())
+
 	m.Range(func(k, v any) bool {
 		// Atomically delete the entry from the map, so new entry is created for the next flush.
 		m.Delete(k)
+		// fmt.Println("wang  I have deleted the entry: %d", time.Now().UnixMicro())
 
 		sv := v.(*maxStateValue)
 		sv.mu.Lock()
@@ -73,6 +86,8 @@ func (as *maxAggrState) flushState(ctx *flushCtx) {
 		sv.mu.Unlock()
 
 		key := k.(string)
+		// fmt.Printf("Im here %d, %v", time.Now().UnixMicro(), max)
+
 		ctx.appendSeries(key, "max", max)
 		return true
 	})

lib/streamaggr/max_test.go

@@ -0,0 +1,89 @@
+package streamaggr
+
+import (
+	// "fmt"
+	"testing"
+	"time"
+
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/prompbmarshal"
+	// "time"
+	// "github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
+)
+
+func TestPushSampleRace(t *testing.T) {
+	as := maxAggrState{}
+	for i := 0; i < 2; i++ {
+		go func() {
+			inputLabels := []prompbmarshal.Label{
+				{
+					Name:  "id",
+					Value: "1",
+					// Value:  fmt.Sprintf("%d", i),
+				},
+			}
+			outputLabels := []prompbmarshal.Label{
+
+				{
+					Name:  "label",
+					Value: "label",
+				},
+				{
+					Name:  "label1",
+					Value: "label1",
+				},
+				{
+					Name:  "label2",
+					Value: "label2",
+				},
+				{
+					Name:  "label3",
+					Value: "label3",
+				},
+				{
+					Name:  "label4",
+					Value: "label4",
+				},
+				{
+					Name:  "label5",
+					Value: "label5",
+				},
+				{
+					Name:  "label6",
+					Value: "label6",
+				},
+				{
+					Name:  "label7",
+					Value: "label7",
+				},
+				{
+					Name:  "label8",
+					Value: "label8",
+				},
+				{
+					Name:  "label9",
+					Value: "label9",
+				},
+				{
+					Name:  "label11",
+					Value: "label11",
+				},
+				{
+					Name:  "label12",
+					Value: "label12",
+				},
+			}
+			buf := compressLabels([]byte{}, inputLabels, outputLabels)
+			key := bytesutil.ToUnsafeString(buf)
+			sample := []pushSample{
+				{
+					key:       key,
+					value:     1,
+					timestamp: 123,
+				},
+			}
+			as.pushSamples(sample)
+		}()
+	}
+	time.Sleep(1 * time.Second)
+}