run-cpu-stress.sh fails when no logfilename is passed.

typos

.pistressrc

@@ -0,0 +1,8 @@
+if [ -z ${PISTRESS_HOME} ]; then
+  export PISTRESS_HOME=/home/pi/git/pistress
+fi
+export THERMAL_ZONE=/sys/class/thermal/thermal_zone0/temp
+
+export FIO_NUMJOBS=$(nproc)
+export FIO_RUNNING_TIME=3600
+

README.md

@@ -1,5 +1,15 @@
 # pistress
 
-A bunch of scripts for measuring the core temperature of the Raspberry Pi 5 CPU under full load
+A bunch of scripts for measuring the core temperature of  any single board computer's CPU under full load
 and plotting graphs .
-Requirements: fio, gnuplot
+
+== Installation ==
+
+sudo apt install -y fio gnuplot
+cp .pistressrc ~
+
+Edit ~/.pistressrc and canfigure values for your needs.
+
+== Licence ==
+
+Licenced under MIT Licence See file LICENCE

bin/measure_temp.sh

@@ -7,10 +7,30 @@ usage() {
   cat <<-EOF
 	Usage: ${name} [-h || --help]
 
-	measures the pu core temperature an echoes with a squenence number to stdout.
+	measures the cpu's core temperature and writes it with a timestamp to stdout.
 	EOF
 }
 
+#format the temperature to float value
+format_temp() {
+ ftemp=${1:0:2}
+ 
+ ftemp+="."
+ ftemp+=${1:2:1}
+
+ echo "${ftemp}"
+}
+
+
+#retrieve the cpu's temperature from /sys/class/thermal/thermal_zone0/temp
+measure_temp() {
+   cpu_temp=$(cat ${THERMAL_ZONE})
+
+   formatted_temp=$(format_temp "${cpu_temp}")
+
+   echo "${formatted_temp}"
+ }
+
 if [[ "$1" == "-h" || "$1" == "--help" ]]; then
     usage
     exit 0
@@ -19,8 +39,8 @@ fi
 while true; do
   NOW=$(date +%s)
   TS=$((NOW - START))
-  TEMP=$(vcgencmd measure_temp | sed 's/[^0-9.]//g')
-  echo "$TS $TEMP"
+  TEMP=$(measure_temp)
+  echo "${TS} ${TEMP}"
   sleep 1
 done
 

bin/plot_cpu_temp.sh

@@ -1,5 +1,5 @@
-#!/bin/bash
-VERSION="1.00"
+#! /usr/bin/env bash
+VERSION="1.04"
 usage() {
   local name=${0##*/}
 
@@ -121,6 +121,6 @@ plot LOGFILE using 1:2 with lines lc rgb COLOR lw 2 title 'CPU-Temperatur';
 "
 
 
-echo "Plot erzeugt: $OUTFILE"
+echo "Plot generated: ${OUTFILE}"
 exit 0
 

bin/run-cpu-stress.sh

@@ -1,7 +1,23 @@
+#! /usr/bin/env bash
+
+if [ -f ~/.pistressrc ]; then
+ . ~/.pistressrc
+else
+ export PISTRESS_HOME=/home/pi/git/pistress
+
  export FIO_NUMJOBS=$(nproc)
+ export FIO_RUNNING_TIME=3600
+ export THERMAL_ZONE=/sys/class/thermal/thermal_zone0/temp
+fi
+
+if [ -z "${1}" ]; then
+  echo "usage run-cpu-stress.sh <logfile>"
+  exit 1
+fi
+
 measure_temp.sh > ${1} &
 TPID=$!
-fio ~/git/pistress/fio/fio_cpu
+fio ${PISTRESS_HOME}/fio/fio_cpu
 kill $TPID > /dev/null
 unset FIO_NUMJOBS
 

fio/fio_cpu

@@ -2,7 +2,7 @@
 ioengine=cpuio
 cpuload=100
 cpuchunks=100000
-runtime=3600
+runtime=${FIO_RUNNING_TIME}
 time_based
 group_reporting
 numjobs=${FIO_NUMJOBS}