command=$*

echo $command

# launch the command in the background

$command &

# get the PID

PID=$!

memlogfile="mem_evolution_${PID}.txt"

cpulogfile="cpu_evolution_${PID}.txt"

timelogfile="time_evolution_${PID}.txt"

idlogfile="pid_evolution_${PID}.txt"

echo "#command line: ${command}" > ${memlogfile}

echo "#memory evolution of process ${PID}; columns indicate active children" >> ${memlogfile}

echo "#command line: ${command}" > ${cpulogfile}

echo "#cpu evolution of process ${PID}; columns indicate active children" >> ${cpulogfile}

echo "#command line: ${command}" > ${idlogfile}

echo "#child process id evolution of leading o2-sim process with number ${PID}; columns indicate active children" >> ${idlogfile}

echo "# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #" >> ${memlogfile}

echo "# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #" >> ${cpulogfile}

echo "# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #" >> ${idlogfile}

child_pid_list=

# finds out all the (recursive) child process starting from a parent

# output includes the parent

# output is saves

childprocs() {

local parent=$1

if [ "$parent" ] ; then

child_pid_list="$child_pid_list $parent"

for childpid in $(pgrep -P ${parent}); do

childprocs $childpid

done;

fi

}

# while this PID exists we sample

while [ 1 ] ; do

# get time stamp in mili-seconds

echo $(($(date +%s%N)/1000000)) >> ${timelogfile}

child_pid_list=

childprocs ${PID}

# sum up memory from all child processes

mem=`for pid in $child_pid_list; do cat /proc/$pid/smaps | awk -v pid=$pid '/Pss/{mem+=$2} END {print mem/1024.}'; done | tr '\n' ' '`

echo "${mem}" >> ${memlogfile}

# sum up cpu from all child processes

total_time=`for pid in $child_pid_list; do cat /proc/$pid/stat | awk -v pid=$pid '{total_time=$14+$15+$16+$17} END {print total_time/100.}'; done | tr '\n' ' '`

echo "${total_time}" >> ${cpulogfile}

# record the PID

id=`for pid in $child_pid_list; do echo $pid; done | tr '\n' ' '`

echo "${id}" >> ${idlogfile}

# check if the job is still there

ps -p $PID > /dev/null

[ $? == 1 ] && echo "Job finished; Exiting " && break

sleep 0.005

done