[benchmark/cpu] set ymax to prevent the graph go to the legend

hack/benchmark/time-to-k8s/chart.go

@@ -74,7 +74,7 @@ func readInCSV(csvPath string, apps map[string]runs) error {
 
 		values := []float64{}
 
-		// 8-13 contain the run results
+		// 8-16 contain the run results
 		for i := 8; i <= 16; i++ {
 			v, err := strconv.ParseFloat(d[i], 64)
 			if err != nil {

hack/benchmark/time-to-k8s/cpu.go

@@ -57,12 +57,13 @@ func createCPUChart(chartPath string, values []plotter.Values, names []string) e
 	p := plot.New()
 	p.Title.Text = "CPU utilization to go from 0 to successful Kubernetes deployment"
 	p.Y.Label.Text = "CPU utilization"
+	setYMax(p, values)
 
 	w := vg.Points(20)
 
 	barsA, err := plotter.NewBarChart(values[0], w)
 	if err != nil {
-		panic(err)
+		return err
 	}
 	barsA.LineStyle.Width = vg.Length(0)
 	barsA.Color = plotutil.Color(0)
@@ -70,7 +71,7 @@ func createCPUChart(chartPath string, values []plotter.Values, names []string) e
 
 	barsB, err := plotter.NewBarChart(values[1], w)
 	if err != nil {
-		panic(err)
+		return err
 	}
 	barsB.LineStyle.Width = vg.Length(0)
 	barsB.Color = plotutil.Color(1)
@@ -78,7 +79,7 @@ func createCPUChart(chartPath string, values []plotter.Values, names []string) e
 
 	barsC, err := plotter.NewBarChart(values[2], w)
 	if err != nil {
-		panic(err)
+		return err
 	}
 	barsC.LineStyle.Width = vg.Length(0)
 	barsC.Color = plotutil.Color(2)
@@ -100,3 +101,16 @@ func createCPUChart(chartPath string, values []plotter.Values, names []string) e
 
 	return nil
 }
+
+func setYMax(p *plot.Plot, values []plotter.Values) {
+	ymax := 0.0
+	for _, value := range values {
+		for _, v := range value {
+			if v > ymax {
+				ymax = v
+			}
+		}
+	}
+
+	p.Y.Max = ymax + 5
+}

hack/benchmark/time-to-k8s/page.go

@@ -66,7 +66,7 @@ func main() {
 	apps := make(map[string]runs)
 
 	if err := readInCSV(*csvPath, apps); err != nil {
-		log.Fatal(err)
+		log.Fatalf("fail to readin cvs file with err %s", err)
 	}
 
 	runningTime, cpuMdPlot, cpuChartPlot, totals, names := values(apps)
@@ -76,7 +76,7 @@ func main() {
 
 	// chart for running time
 	if err := createChart(*imagePath+"-time.png", runningTime, totals, names); err != nil {
-		log.Fatal(err)
+		log.Fatalf("fail to create running time chart with err %s", err)
 	}
 
 	// markdown table for cpu utilization
@@ -84,7 +84,7 @@ func main() {
 
 	// chart for cpu utilization
 	if err := createCPUChart(*imagePath+"-cpu.png", cpuChartPlot, names); err != nil {
-		log.Fatal(err)
+		log.Fatalf("fail to create CPU chart with err %s", err)
 	}
 
 	// generate page and save
@@ -96,11 +96,11 @@ func main() {
 
 	f, err := os.Create(*pagePath)
 	if err != nil {
-		log.Fatal(err)
+		log.Fatalf("fail to create file under path %s, with err %s", *pagePath, err)
 	}
 
 	if err = tmpl.Execute(f, data); err != nil {
-		log.Fatal(err)
+		log.Fatalf("fail to populate the page with err %s", err)
 	}
 
 	f.Close()