From 946c9ce6ea57f47a8b7b38687f0924e06953e59a Mon Sep 17 00:00:00 2001
From: Lomanic <Lomanic@users.noreply.github.com>
Date: Sun, 23 Jun 2019 16:14:14 +0200
Subject: [PATCH] [cpu] Fix #599 cap percent values returned by Percent()
 between 0 and 100

See https://github.com/shirou/gopsutil/issues/599#issuecomment-491942842 for a repoduction case
---
 cpu/cpu.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/cpu/cpu.go b/cpu/cpu.go
index daf3524..80ce3f0 100644
--- a/cpu/cpu.go
+++ b/cpu/cpu.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"math"
 	"strconv"
 	"strings"
 	"sync"
@@ -112,7 +113,7 @@ func calculateBusy(t1, t2 TimesStat) float64 {
 	if t2All <= t1All {
 		return 1
 	}
-	return (t2Busy - t1Busy) / (t2All - t1All) * 100
+	return math.Min(100, math.Max(0, (t2Busy-t1Busy)/(t2All-t1All)*100))
 }
 
 func calculateAllBusy(t1, t2 []TimesStat) ([]float64, error) {