diff --git a/samples/runner/runner.go b/samples/runner/runner.go
index 71f15c72..a722333b 100644
--- a/samples/runner/runner.go
+++ b/samples/runner/runner.go
@@ -149,11 +149,11 @@ func (r *Runner) buildTimingPlatform() {
 func (*Runner) setAnalyszer(
 	b R9NanoPlatformBuilder,
 ) R9NanoPlatformBuilder {
-	if *analyszerPeriodFlag != 0 && *analyszerNameFlag == "" {
-		panic("must specify -analyszer-name when using -analyszer-period")
+	if *analyszerPeriodFlag == 0 && *analyszerNameFlag != "" {
+		panic("must specify -analyszer-period when using -analyszer-name")
 	}
 
-	if *analyszerNameFlag != "" {
+	if *analyszerPeriodFlag != 0 {
 		b = b.WithPerfAnalyzer(
 			*analyszerNameFlag,
 			*analyszerPeriodFlag,
diff --git a/samples/runner/timingplatform.go b/samples/runner/timingplatform.go
index 1eae1349..01c088fc 100644
--- a/samples/runner/timingplatform.go
+++ b/samples/runner/timingplatform.go
@@ -241,13 +241,11 @@ func (b *R9NanoPlatformBuilder) setupVisTracing() {
 }
 
 func (b *R9NanoPlatformBuilder) setupPerformanceAnalyzer() {
-	if b.perfAnalysisFileName != "" {
-		b.perfAnalyzer = analysis.MakePerfAnalyzerBuilder().
-			WithPeriod(sim.VTimeInSec(b.perfAnalyzingPeriod)).
-			WithDBFilename(b.perfAnalysisFileName).
-			WithEngine(b.engine).
-			Build()
-	}
+	b.perfAnalyzer = analysis.MakePerfAnalyzerBuilder().
+		WithPeriod(sim.VTimeInSec(b.perfAnalyzingPeriod)).
+		WithDBFilename(b.perfAnalysisFileName).
+		WithEngine(b.engine).
+		Build()
 
 	if b.monitor != nil {
 		b.monitor.RegisterPerfAnalyzer(b.perfAnalyzer)