mem-monitor.sh

#!/bin/sh

USAGE="Usage: $0 processName"

if [ $# -ne 1 ]; then
   echo $USAGE
   exit 1
fi


LOG_FILE="memusage.csv"

echo "ElapsedTime,VmSize,VmRSS"
#echo "ElapsedTime,VmSize,VmRSS" > $LOG_FILE

ELAPSED_TIME=0
PERIOD=5        # seconds

# Monitor memory usage forever until script is killed
while :
do
   SUM_VM_SIZE=0
   SUM_RSS_SIZE=0
   # In case the monitored process has not yet started
   # keep searching until its PID is found
   PROCESS_PIDS=""
   while :
   do
      PROCESS_PIDS=`/sbin/pidof $1`

      if [ "$PROCESS_PIDS.X" != ".X" ]; then
         break
      fi
   done

   for PID in ${PROCESS_PIDS} ; do
     VM_SIZE=`awk '/VmSize/ {print $2}' < /proc/$PID/status`
     if [ "$VM_SIZE.X" = ".X" ]; then
        continue
     fi
     #echo exprVM_ $SUM_VM_SIZE + $VM_SIZE
     SUM_VM_SIZE=`expr $SUM_VM_SIZE + $VM_SIZE`

     VM_RSS=`awk '/VmRSS/ {print $2}' < /proc/$PID/status`
     if [ "$VM_RSS.X" = ".X" ]; then
        continue
     fi
     SUM_RSS_SIZE=`expr $SUM_RSS_SIZE + $VM_RSS`
   done
   echo "$ELAPSED_TIME sec, $SUM_VM_SIZE KB, $SUM_RSS_SIZE KB"
   echo "$ELAPSED_TIME,$SUM_VM_SIZE,$SUM_RSS_SIZE" >> $LOG_FILE
   sleep $PERIOD
   VM_SIZE=""
   VM_RSS=""
   # Needs to get actual elapsed time instead of doing this
   ELAPSED_TIME=`expr $ELAPSED_TIME + $PERIOD`
done