scripts: Add a slightly better version of the cpu load monitor

scripts/cpuload.py

@@ -0,0 +1,20 @@
+#!/usr/bin/env python
+import subprocess
+import serial
+ser = serial.Serial("/dev/ttyACM0")
+ser.write(b'\nxx\n')
+last = 0
+
+while 1:
+	p = subprocess.Popen("./getload.sh", shell=True);
+	r = p.wait()
+	r = round(r / 100 * 60)
+	#if (r < last - 2):
+	#	r = last - 4
+	last=r
+	ser.write(b'X')
+	ser.write(r.to_bytes(1, byteorder='big'))
+	ser.write(r.to_bytes(1, byteorder='big'))
+	ser.write(b'\n')
+
+ser.close()

scripts/getload.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+cpu=`cat <(grep 'cpu ' /proc/stat) <(sleep 0.1 && grep 'cpu ' /proc/stat) | awk -v RS="" '{print ($13-$2+$15-$4)*100/($13-$2+$15-$4+$16-$5)}' | sed "s/\..*//g"`
+exit $cpu