On 03/24/2011 10:41 AM, Ismael Schinca wrote:
I'm planning to use different XO's, all of them 1.0 hardware. I
definately won't be able to finish today because they all have different
OS images and I think it would be best if I update them all (even for
future tests). Maybe tomorrow, maybe monday.
Yes certainly please use the same image on all of them. If you have to
install software then please use the latest version of olpc-pwr-log. I
have it attached to this mail.
I think it will be very hard to perform the same test under the same
conditions as you suggest because:
- It will be very time consuming (though it doesn't need a lot of
attention during the test)
My goal is to automate the test and use a very short test window. ie 20
minutes or so.
- The air conditioning in our building is quite frankly chaotic so
temperature is really variable (which is actually a lot worse for us
humans than batteries ;) )
Yes. Sorry my use of the word exactly was probably too strong. I don't
mean that it has to be 25 degC ambient and only that temperature. The
temp fluctuations in a air conditioned office should be within reason.
I just don't want the profiles generated in an office and then the test
run in a outside warehouse at 33C. Or the curves generated on a XO-1
with build 8.2 but the test run on a 1.5 with build 10.1.3. That sort of
thing.
The closer I might get, which I think could be pretty close is:
- Install the SAME fresh OS image and firmware version on all the test XOs
- Disable power management in every XO.
and dpms. xset -dpms from the sugar terminal other wise the screen will
turn off in 20 minutes and change the power draw.
- The laptops batteries are mostly charged, so it will be a charge after
discharge, so I think temperature there is less of a concern
- Run the tests at the same time in every XO
Yes. I believe that will work fine.
Note: I'm getting on a plane in a few minutes so this will be my last
e-mail until much later on today. Possible tonight or tomorrow.
--
Richard A. Smith <[email protected]>
One Laptop per Child
#!/bin/sh
# Copyright One Laptop Per Child
# Power loging script
# Released under GPLv3
VERSION="2.0.1"
FDATE=`date "+%y%m%d-%H%M%S"`
HOST=`hostname -s`
B_INFO=/sys/class/power_supply/olpc-battery
# This is the delay in the wallclock_delay. Its the minimum sample time for the
# system date.
WALL_PERIOD=5
# This is the (approx) delay inbetween readings.
# This delay should be some where in the middle of integer mutiples of
WALL_PERIOD
# delays that bound the desired delay.
# That way if our timer and system date are out of phase you don't end up
having to wait a whole
# new WALL_PERIOD for the RTC check to expire.
# DELAY=12
# As of ver 1.14 I've switched back to using sleep rather than my
wallclock_delay.
# I the previous issues I had with using sleep were never resolved.
# I'm going to try to resolve them this time if I see them since they are
considered
# a bug.
# A delay of 10 seconds seems to be too low.
DELAY=20
if [ -e /sys/class/dmi/id/product_version ]
then
XO_VERSION=$(< /sys/class/dmi/id/product_version )
else
XO_VERSION="1"
fi
KERNVER=`uname -r | cut -c 1-6 | sed 's/\.//g'`
if [[ $KERNVER -gt 2625 ]]; then
KERNAPI=2
else
KERNAPI=1
fi
echo "Checking/waiting for a battery"
until [ $(< $B_INFO/present ) = 1 ]
do
sleep 1
done
# If we just inserted a battery the EC needs time to
# read all the info.
echo "Found one."
echo "Pausing to let the EC think"
sleep 3
# Now that we wait for a battery we can use the battery serial number in the
filename
DS_SERNUM=$(< $B_INFO/serial_number )
LOGFILE="pwr-$FDATE-$DS_SERNUM.csv"
ACR_PROP="charge_counter"
if [ ! -e $B_INFO/$ACR_PROP ]
then
ACR_PROP="accum_current"
fi
if [ -e /boot/olpc_build ]
then
BUILD=$(< /boot/olpc_build )
fi
if [ -e /bootpart/boot/olpc_build ]
then
BUILD=$(< /bootpart/boot/olpc_build )
fi
if [ -e $B_INFO/eeprom ]
then
# Skip 64 bytes and read 5 bytes; display without an address and in single byte
mode
# I don't use od directly since the -j skip does not do a real fseek.
echo "Reading eeprom data."
MFG_SER=`dd if=$B_INFO/eeprom bs=1 skip=64 count=5 2> /dev/null | od -A
n -t x1`
CHGCNT=`dd if=$B_INFO/eeprom bs=1 skip=74 count=2 2> /dev/null| od -A n
-t x1 `
CHGSOC=`dd if=$B_INFO/eeprom bs=1 skip=76 count=1 2> /dev/null| od -A n
-t x1 `
DISCNT=`dd if=$B_INFO/eeprom bs=1 skip=77 count=2 2> /dev/null| od -A n
-t x1 `
DISSOC=`dd if=$B_INFO/eeprom bs=1 skip=79 count=1 2> /dev/null| od -A n
-t x1 `
else
echo "Can't read the eeprom data because your kernel dosen't support
eeprom dump"
MFG_SER="NA"
CHGCNT="NA"
CHGSOC="NA"
DISCNT="NA"
DISSOC="NA"
fi
echo "Starting log $LOGFILE"
echo
echo "pwr_log Ver: $VERSION" > $LOGFILE
echo -n "HOST: " >> $LOGFILE
echo $HOST >> $LOGFILE
echo -n "DATE: " >> $LOGFILE
echo `date` >> $LOGFILE
echo -n "ECVER: " >> $LOGFILE
echo `cat /ofw/ec-name` >> $LOGFILE
echo -n "OFWVER: " >> $LOGFILE
echo `cat /ofw/openprom/model` >> $LOGFILE
echo -n "MODEL: " >> $LOGFILE
echo `cat /ofw/model` >> $LOGFILE
echo -n "SERNUM: " >> $LOGFILE
echo `cat /ofw/serial-number` >> $LOGFILE
echo -n "BATTECH: " >> $LOGFILE
echo `cat $B_INFO/technology` >> $LOGFILE
echo -n "BATMFG: " >> $LOGFILE
echo `cat $B_INFO/manufacturer` >> $LOGFILE
echo -n "BATSER: " >> $LOGFILE
echo $DS_SERNUM >> $LOGFILE
echo -n "BUILD: " >> $LOGFILE
echo $BUILD >> $LOGFILE
echo -n "MFGSER: " >> $LOGFILE
echo $MFG_SER >> $LOGFILE
echo -n "CHGCNT: " >> $LOGFILE
echo $CHGCNT >> $LOGFILE
echo -n "CHGSOC: " >> $LOGFILE
echo $CHGSOC >> $LOGFILE
echo -n "DISCNT: " >> $LOGFILE
echo $DISCNT >> $LOGFILE
echo -n "DISSOC: " >> $LOGFILE
echo $DISSOC >> $LOGFILE
echo -n "WALL_PERIOD: " >> $LOGFILE
echo $WALL_PERIOD: >> $LOGFILE
echo -n "DELAY: " >> $LOGFILE
echo $DELAY: >> $LOGFILE
echo -n "XOVER: " >> $LOGFILE
echo $XO_VERSION >> $LOGFILE
echo -n "KERNVER: " >> $LOGFILE
echo $KERNVER >> $LOGFILE
echo -n "KERNAPI: " >> $LOGFILE
echo $KERNAPI >> $LOGFILE
# Allow the addition of some descriptive text from the cmd line
echo -n "COMMENT: " >> $LOGFILE
echo $1 >> $LOGFILE
echo "<StartData>" >> $LOGFILE
# feed this the wall clock time in seconds you wish to delay
# It will spin until that time has passed. If the system is suspeneded
# it may sleep more.
function wallclock_delay {
DATE1=`date +%s`
EXPIRE=$((DATE1+$1))
while [ `date +%s` -lt $EXPIRE ]; do
sleep $WALL_PERIOD
done
}
# convert a number into 2's complement
function conv_2s_comp {
# this has since been changed in the kernel so that it returns
# a signed value rather than unsigned. which fixes the math
# So if its already negative then bail
if [ $1 -lt 0 ]
then
echo $1
return
fi
if [ $1 -gt 32767 ]
then
echo $(( 0 - (65535-$1+1) ))
return
fi
echo $1
}
CAPACITY=capacity
if [ ! -f $B_INFO/$CAPACITY ]
then
CAPACITY=capacity_level
fi
function get_acr {
local acr_temp
acr_temp=$(< $B_INFO/$ACR_PROP )
test $KERNAPI -eq 1 && acr_temp=$(conv_2s_comp ${acr_temp:-0})
echo ${acr_temp:-0}
}
START_ACR=$(get_acr)
while true
do
CAPLEVEL=$(< $B_INFO/$CAPACITY )
VOLT=$(< $B_INFO/voltage_avg)
CURR=$(< $B_INFO/current_avg)
TEMP=$(< $B_INFO/temp)
STAT=$(< $B_INFO/status)
ACR=$(get_acr)
ACR_DIFF=$(( ${ACR-0}-${START_ACR-0} ))
if [ $KERNAPI -eq 1 ]
then
MAh=$(( $ACR_DIFF * 625 / 1500 ))
else
MAh=$ACR_DIFF
fi
echo `date +%s`",$CAPLEVEL,$VOLT,$CURR,$TEMP,$ACR,$STAT,$MAh" | tee -a
$LOGFILE
sync
# wallclock_delay $DELAY
sleep $DELAY
done
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