Difference between revisions of "ACPI sleep power drain test script"
| Line 11: | Line 11: | ||
{{NOTE|This Script has some limitations: | {{NOTE|This Script has some limitations: | ||
*It is not totally reliable, e.g. on some (all?) R32 the values ACPI reports for the battery are wrong by factor 10. They are actually reported in cWh instead of mWh. The script assumes they are reported in mWh as on most ThinkPads - hence the power consumption appearce to be only a tenth of its actual value. | *It is not totally reliable, e.g. on some (all?) R32 the values ACPI reports for the battery are wrong by factor 10. They are actually reported in cWh instead of mWh. The script assumes they are reported in mWh as on most ThinkPads - hence the power consumption appearce to be only a tenth of its actual value. | ||
| − | *The script assumes you have only one battery. If you have a second battery (for example, an UltraBay Slim battery), take it out for this test or change | + | *The script assumes you have only one battery. If you have a second battery (for example, an UltraBay Slim battery), take it out for this test or change the BATTERY variable from "BAT0" to "BAT1". If you do the latter, you will get bogus results if the second battery is run down while sleeping. |
| − | *The usage threshold of 1000 mWh might be a bit a bit too tolerant. You can try lowering it to 500 | + | *The usage threshold of 1000 mWh might be a bit a bit too tolerant. You can try lowering it to 500 to be sure.}} |
Please save this script to a file, i.e. {{path|sleep.sh}}, make it executable ({{cmdroot|chmod +x sleep.sh}}) and execute it as root while your notebook is on battery. To get representative values you should leave the notebook suspended for at least 20 minutes. | Please save this script to a file, i.e. {{path|sleep.sh}}, make it executable ({{cmdroot|chmod +x sleep.sh}}) and execute it as root while your notebook is on battery. To get representative values you should leave the notebook suspended for at least 20 minutes. | ||
| Line 18: | Line 18: | ||
#!/bin/sh | #!/bin/sh | ||
# sleep.sh test script for measuring power drain during suspend-to-ram with ACPI | # sleep.sh test script for measuring power drain during suspend-to-ram with ACPI | ||
| + | |||
| + | # default settings, change if needed | ||
| + | LOG=/var/log/battery.log | ||
| + | BATTERY=BAT0 | ||
| + | THRESHOLD=1000 | ||
# remove USB for external mouse before sleeping | # remove USB for external mouse before sleeping | ||
| Line 30: | Line 35: | ||
fi | fi | ||
| + | # save system time | ||
hwclock --systohc | hwclock --systohc | ||
| − | + | # get start values | |
date >> $LOG | date >> $LOG | ||
DATE_BEFORE=`date +%s` | DATE_BEFORE=`date +%s` | ||
| − | BAT_BEFORE=`grep 'remaining capacity' /proc/acpi/battery/ | + | BAT_BEFORE=`grep 'remaining capacity' /proc/acpi/battery/$BATTERY/state | awk '{print $3}'` |
| − | + | ||
| − | + | # go to sleep | |
echo 3 > /proc/acpi/sleep | echo 3 > /proc/acpi/sleep | ||
| + | # get end values | ||
DATE_AFTER=`date +%s` | DATE_AFTER=`date +%s` | ||
| − | BAT_AFTER=`grep 'remaining capacity' /proc/acpi/battery/ | + | BAT_AFTER=`grep 'remaining capacity' /proc/acpi/battery/$BATTERY/state | awk '{print $3}'` |
| − | + | ||
| − | + | # do the calculations | |
DIFF=`echo "$BAT_AFTER - $BAT_BEFORE" | bc` | DIFF=`echo "$BAT_AFTER - $BAT_BEFORE" | bc` | ||
SECONDS=`echo "$DATE_AFTER - $DATE_BEFORE" | bc` | SECONDS=`echo "$DATE_AFTER - $DATE_BEFORE" | bc` | ||
| + | USAGE=`echo "($DIFF * 60 * 60) / ($SECONDS)" | bc` | ||
| + | |||
| + | # output the results | ||
| + | echo "before: $BAT_BEFORE mWh" >> $LOG | ||
| + | echo "after: $BAT_AFTER mWh" >> $LOG | ||
echo "diff: $DIFF mWh" >> $LOG | echo "diff: $DIFF mWh" >> $LOG | ||
echo "seconds: $SECONDS sec" >> $LOG | echo "seconds: $SECONDS sec" >> $LOG | ||
| − | |||
echo "result: $USAGE mW" >> $LOG | echo "result: $USAGE mW" >> $LOG | ||
| − | if [ $USAGE -gt - | + | if [ $USAGE -gt -$THRESHOLD ] |
then | then | ||
echo "Congratulations, your model seems NOT to be affected." >> $LOG | echo "Congratulations, your model seems NOT to be affected." >> $LOG | ||
| Line 63: | Line 74: | ||
fi | fi | ||
echo "" >> $LOG | echo "" >> $LOG | ||
| − | + | ||
| + | # restore USB support | ||
if !(lsmod | grep '^ehci_hcd') >/dev/null ; then | if !(lsmod | grep '^ehci_hcd') >/dev/null ; then | ||
/sbin/modprobe -s ehci_hcd | /sbin/modprobe -s ehci_hcd | ||
| Line 74: | Line 86: | ||
fi | fi | ||
| + | # restore system time | ||
hwclock --hctosys | hwclock --hctosys | ||
Revision as of 23:31, 31 July 2005
The following script will suspend your notebook to ram and output some statistics about the power drain during suspend to /var/log/battery.log. The output will look something like this:
Di Jan 11 14:01:15 CET 2005 before: 41170 mWh after: 41000 mWh diff: -170 mWh seconds: 1671 sec result: -366 mW Congratulations, your model seems NOT to be affected.
NOTE!
This Script has some limitations:
- It is not totally reliable, e.g. on some (all?) R32 the values ACPI reports for the battery are wrong by factor 10. They are actually reported in cWh instead of mWh. The script assumes they are reported in mWh as on most ThinkPads - hence the power consumption appearce to be only a tenth of its actual value.
- The script assumes you have only one battery. If you have a second battery (for example, an UltraBay Slim battery), take it out for this test or change the BATTERY variable from "BAT0" to "BAT1". If you do the latter, you will get bogus results if the second battery is run down while sleeping.
- The usage threshold of 1000 mWh might be a bit a bit too tolerant. You can try lowering it to 500 to be sure.
Please save this script to a file, i.e. sleep.sh, make it executable (# chmod +x sleep.sh) and execute it as root while your notebook is on battery. To get representative values you should leave the notebook suspended for at least 20 minutes.
#!/bin/sh # sleep.sh test script for measuring power drain during suspend-to-ram with ACPI
# default settings, change if needed
LOG=/var/log/battery.log
BATTERY=BAT0
THRESHOLD=1000
# remove USB for external mouse before sleeping
if lsmod | grep '^usbhid' >/dev/null ; then
/sbin/modprobe -r -s usbhid
fi
if lsmod | grep '^uhci_hcd' >/dev/null ; then
/sbin/modprobe -r -s uhci_hcd
fi
if lsmod | grep '^ehci_hcd' >/dev/null ; then
/sbin/modprobe -r -s ehci_hcd
fi
# save system time
hwclock --systohc
# get start values
date >> $LOG
DATE_BEFORE=`date +%s`
BAT_BEFORE=`grep 'remaining capacity' /proc/acpi/battery/$BATTERY/state | awk '{print $3}'`
# go to sleep
echo 3 > /proc/acpi/sleep
# get end values
DATE_AFTER=`date +%s`
BAT_AFTER=`grep 'remaining capacity' /proc/acpi/battery/$BATTERY/state | awk '{print $3}'`
# do the calculations DIFF=`echo "$BAT_AFTER - $BAT_BEFORE" | bc` SECONDS=`echo "$DATE_AFTER - $DATE_BEFORE" | bc` USAGE=`echo "($DIFF * 60 * 60) / ($SECONDS)" | bc`
# output the results
echo "before: $BAT_BEFORE mWh" >> $LOG
echo "after: $BAT_AFTER mWh" >> $LOG
echo "diff: $DIFF mWh" >> $LOG
echo "seconds: $SECONDS sec" >> $LOG
echo "result: $USAGE mW" >> $LOG
if [ $USAGE -gt -$THRESHOLD ]
then
echo "Congratulations, your model seems NOT to be affected." >> $LOG
else
echo "Your model seems to be affected." >> $LOG
fi
if [ $SECONDS -lt 1200 ]
then
echo "!!! The notebook was suspended less than 20 minutes." >> $LOG
echo "!!! To get representative values please let the notebook sleep" >> $LOG
echo "!!! for at least 20 minutes." >> $LOG
fi
echo "" >> $LOG
# restore USB support if !(lsmod | grep '^ehci_hcd') >/dev/null ; then /sbin/modprobe -s ehci_hcd fi if !(lsmod | grep '^uhci_hcd') >/dev/null ; then /sbin/modprobe -s uhci_hcd fi if !(lsmod | grep '^usbhid') >/dev/null ; then /sbin/modprobe -s usbhid fi # restore system time hwclock --hctosys
The script was originally written by Jan-Hendrik Benter and was modified a little for this page.
