Merge pull request #20 from essentialkaos/develop

Version 3.0.3

Author: andyone

common/redis-latency-monitor.spec

@@ -10,7 +10,7 @@
 
 Summary:         Tiny Redis client for latency measurement
 Name:            redis-latency-monitor
-Version:         3.0.2
+Version:         3.0.3
 Release:         0%{?dist}
 Group:           Applications/System
 License:         EKOL
@@ -58,6 +58,10 @@ rm -rf %{buildroot}
 ################################################################################
 
 %changelog
+* Wed Oct 31 2018 Anton Novojilov <[email protected]> - 3.0.3-0
+- Fixed bug with Max/Mean/StDev/Perc calculation
+- Minor UI improvements
+
 * Sat Oct 20 2018 Anton Novojilov <[email protected]> - 3.0.2-0
 - Show usage info if '-h' passed without any value
 

redis-latency-monitor.go

@@ -34,7 +34,7 @@ import (
 // App info
 const (
 	APP  = "Redis Latency Monitor"
-	VER  = "3.0.2"
+	VER  = "3.0.3"
 	DESC = "Tiny Redis client for latency measurement"
 )
 
@@ -334,7 +334,7 @@ func printMeasurements(t *table.Table, errors int, measurements stats.Data, pret
 
 	if prettyOutput {
 		t.Print(
-			timeutil.Format(time.Now(), "%H:%M:%S.%K"),
+			timeutil.Format(time.Now(), "%H:%M:%S{s-}.%K{!}"),
 			fmtutil.PrettyNum(len(measurements)),
 			fmtutil.PrettyNum(errors),
 			formatNumber(min), formatNumber(max),
@@ -383,7 +383,7 @@ func formatNumber(value uint64) string {
 		fv = mathutil.Round(fv, 2)
 	}
 
-	return strings.Replace(fmtutil.PrettyNum(fv), ".", "{s-}.", -1) + "{!}"
+	return strings.Replace(fmtutil.PrettyNum(fv), ".", "{s}.", -1) + "{!}"
 }
 
 // usToMs convert us in uint64 to ms in float64

stats/stats.go

@@ -60,16 +60,28 @@ func Min(d Data) uint64 {
 
 // Max return maximum value in slice
 func Max(d Data) uint64 {
+	if len(d) == 0 {
+		return 0
+	}
+
 	return d[len(d)-1]
 }
 
 // Mean return average value
 func Mean(d Data) uint64 {
+	if len(d) == 0 {
+		return 0
+	}
+
 	return d.Sum() / uint64(len(d))
 }
 
 // StandardDeviation return amount of variation in the dataset
 func StandardDeviation(d Data) uint64 {
+	if len(d) == 0 {
+		return 0
+	}
+
 	m := Mean(d)
 
 	var variance int64
@@ -85,6 +97,10 @@ func StandardDeviation(d Data) uint64 {
 
 // Percentile calculate percetile
 func Percentile(d Data, percent float64) uint64 {
+	if len(d) == 0 {
+		return 0
+	}
+
 	if percent > 100 {
 		return 0
 	}