#!/bin/sh
# Test B board-side CPU load with guard: N x `yes`, stop on PMIC > 52 C, VADC VBAT < 3.95 V, or after MAX s. Writes /tmp only.
N=${1:-2}; MAX=${2:-300}; L=/tmp/b10b3b-load.log; D=/sys/bus/iio/devices/iio:device0
trap '' HUP
t0=$(cut -d. -f1 /proc/uptime); P=""
for i in $(seq 1 $N); do yes > /dev/null & P="$P $!"; done
echo "LOAD-START up=$t0 n=$N pids=$P" >> $L
why=timeout
while :; do
  t=$(cut -d. -f1 /proc/uptime); vb=$(cat $D/in_voltage6_input); pt=$(cat $D/in_temp8_input)
  echo "L up=$t vbat6=$vb pmt=$pt" >> $L
  [ "$pt" -gt 52000 ] && { why=pmic-52C; break; }
  [ "$vb" -lt 3950000 ] && { why=vbat-below-3.95V; break; }
  [ $((t - t0)) -ge $MAX ] && break
  sleep 5
done
kill $P; echo "LOAD-STOP up=$(cut -d' ' -f1 /proc/uptime) reason=$why" >> $L