testcases/pounder21/test_scripts/cpufreq

   1 #!/bin/bash
   2
   3 # Cycle the CPUs through various frequencies.
   4
   5 # Copyright (C) 2003-2006 IBM
   6 #
   7 # This program is free software; you can redistribute it and/or
   8 # modify it under the terms of the GNU General Public License as
   9 # published by the Free Software Foundation; either version 2 of the
  10 # License, or (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful, but
  13 # WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 # General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program; if not, write to the Free Software
  19 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  20 # 02111-1307, USA.
  21
  22
  23 # Do any CPU support cpufreq?
  24 CPUFREQ_ENABLED_CPUS=`/bin/ls -lad /sys/devices/system/cpu/cpu*/cpufreq 2> /dev/null | wc -l`
  25
  26 if [ "$CPUFREQ_ENABLED_CPUS" -lt 1 ]; then
  27         echo "None of your CPUs support cpufreq.  Bye."
  28         exit 255
  29 fi
  30
  31 # Turn on acpi_pstate_strict to ensure that state transitions actually happen...
  32 if [ -f /sys/module/acpi_cpufreq/parameters/acpi_pstate_strict ]; then
  33         echo 1 > /sys/module/acpi_cpufreq/parameters/acpi_pstate_strict
  34 fi
  35 if [ -f /sys/module/acpi/parameters/acpi_pstate_strict ]; then
  36         echo 1 > /sys/module/acpi/parameters/acpi_pstate_strict
  37 fi
  38
  39 # First, knock off any powersaving daemons...
  40 for i in `ls /etc/init.d/*powernow /etc/init.d/*cpuspeed* /etc/init.d/*powersave* 2> /dev/null`; do
  41         "$i" stop
  42 done
  43
  44 # Ensure that we have the userspace governor running
  45 for i in /sys/devices/system/cpu/cpu*; do
  46         echo userspace > "$i/cpufreq/scaling_governor"
  47 done
  48
  49 # Trap ^C
  50 trap 'kill -9 `pgrep -P $$` `pgrep cpufreq.bin` 2> /dev/null; exit 0' 1 2 15
  51
  52 # Did we see any failures?
  53 LOGFILE=/proc/$$/fd/1
  54 OLD_ERRORS=`egrep -ic "(error|fail|invalid|denied|cannot)" $LOGFILE`
  55
  56 # For all CPUs with cpufreq: remove CPUs that are locked with another.
  57 function find_cpufreq_cpus() {
  58         for cpu in `ls -d /sys/devices/system/cpu/cpu*/cpufreq 2> /dev/null`; do
  59                 # Locked CPUs are done with symlinks in 2.6.14.
  60                 if [ -L "$cpu" ]; then
  61                         continue;
  62                 fi
  63
  64                 CPU_NUM=`dirname $cpu | sed -e 's/.*cpu//g'`
  65                 MATCHES=`(cat /sys/devices/system/cpu/cpu*/cpufreq/affected_cpus /dev/null 2> /dev/null | while read car cdr; do echo $cdr; done) | grep "^$CPU_NUM$" -c`
  66                 if [ $MATCHES -eq 0 ]; then
  67                         echo $CPU_NUM
  68                 fi
  69         done
  70 }
  71
  72 # Find the frequencies for a given CPU
  73 function find_cpu_frequencies() {
  74         i="/sys/devices/system/cpu/cpu$1"
  75
  76         if [ -f "$i/cpufreq/scaling_available_frequencies" ]; then
  77                 cat "$i/cpufreq/scaling_available_frequencies"
  78         else
  79                 cat "$i/cpufreq/scaling_min_freq" "$i/cpufreq/scaling_max_freq"
  80         fi
  81 }
  82
  83 # Figure out which CPUs have cpufreq support.
  84 find_cpufreq_cpus | while read f; do
  85         echo Starting CPU frequency testing on CPU $f
  86         i=/sys/devices/system/cpu/cpu$f
  87
  88         # Does this CPU have cpufreq?
  89         if [ ! -d "$i/cpufreq/" ]; then
  90                 continue;
  91         fi
  92
  93         # Kick off the test.
  94         "$POUNDER_HOME/timed_loop" 900 "$POUNDER_SRCDIR/cpufreq/cpufreq.bin" "$i/cpufreq/scaling_setspeed" 10000 $f `find_cpu_frequencies $f` &
  95 done
  96
  97 # Wait for this to finish
  98 while [ `pgrep cpufreq.bin | wc -l` -gt 0 ]; do
  99         sleep 5
 100 done
 101
 102 # Did we see any failures?
 103 NEW_ERRORS=`egrep -ic "(error|fail|invalid|denied|cannot)" $LOGFILE`
 104 ERRORS=$(( NEW_ERRORS - OLD_ERRORS ))
 105 if [ $ERRORS -eq 255 ]; then
 106         ERRORS=254
 107 fi
 108
 109 # Failures will show up in the test output.  Or better yet,
 110 # panic/oops/BUG the machine.
 111 exit $ERRORS