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 112
