From d4985c9690f69b19b13e84a287de8d427be79568 Mon Sep 17 00:00:00 2001
From: renaynay <41963722+renaynay@users.noreply.github.com>
Date: Tue, 12 May 2020 13:36:13 +0200
Subject: [PATCH] added check for CLK_TCK

---
 cpu/cpu_darwin.go | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/cpu/cpu_darwin.go b/cpu/cpu_darwin.go
index cd0475d..3d3455e 100644
--- a/cpu/cpu_darwin.go
+++ b/cpu/cpu_darwin.go
@@ -4,6 +4,7 @@ package cpu
 
 import (
 	"context"
+	"os/exec"
 	"strconv"
 	"strings"
 
@@ -23,6 +24,21 @@ const (
 // default value. from time.h
 var ClocksPerSec = float64(128)
 
+func init() {
+	getconf, err := exec.LookPath("getconf")
+	if err != nil {
+		return
+	}
+	out, err := invoke.Command(getconf, "CLK_TCK")
+	// ignore errors
+	if err == nil {
+		i, err := strconv.ParseFloat(strings.TrimSpace(string(out)), 64)
+		if err == nil {
+			ClocksPerSec = float64(i)
+		}
+	}
+}
+
 func Times(percpu bool) ([]TimesStat, error) {
 	return TimesWithContext(context.Background(), percpu)
 }