ba: Add CPU utime and stime comparison

go/extra/ba/cmd/ba.go

@@ -65,6 +65,11 @@ or doesn't reach min_threshold.<metric>.{avg|max}_ratio, ba exits with error cod
 			maxThresholdAvgRatio: 1.1,
 			maxThresholdMaxRatio: 1.1,
 		},
+		"cpu": &Metric{
+			getter:               getCPUTime,
+			maxThresholdAvgRatio: 1.05,
+			maxThresholdMaxRatio: 1.05,
+		},
 	}
 	userMetrics []string
 
@@ -146,6 +151,21 @@ func getRssAnonMemory(ctx context.Context, test string, bi *model.SampleStream)
 	return getSummableMetric(ctx, "oasis_worker_mem_RssAnon_bytes", test, bi)
 }
 
+// getCPUTime returns average and maximum sum of utime and stime for all workers of the given coarse benchmark instance
+// ("up" metric).
+func getCPUTime(ctx context.Context, test string, bi *model.SampleStream) (float64, float64, error) {
+	utimeAvg, utimeMax, err := getSummableMetric(ctx, "oasis_worker_cpu_utime_seconds", test, bi)
+	if err != nil {
+		return 0, 0, err
+	}
+	stimeAvg, stimeMax, err := getSummableMetric(ctx, "oasis_worker_cpu_stime_seconds", test, bi)
+	if err != nil {
+		return 0, 0, err
+	}
+
+	return utimeAvg + stimeAvg, utimeMax + stimeMax, nil
+}
+
 // getSummableMetric returns average and maximum sum of metrics for all workers of the given coarse benchmark instance
 // ("up" metric).
 func getSummableMetric(ctx context.Context, metric string, test string, bi *model.SampleStream) (float64, float64, error) {