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#!/bin/bash
#
# This script is derived from rdj-spacepeak.sh in
# the GenomeTools repository (www.genometools.org).
#
# (c) 2010-2017 Giorgio Gonnella, ZBH, University of Hamburg
#
sleeptime=0.1
if [ $# -eq 0 ]; then
echo "Usage: $0 <command> [args]"
echo
echo "The following information is polled each $sleeptime seconds"
echo "from /proc/[pid]/status:"
echo
echo " VmPeak: Peak virtual memory size."
echo " VmSize: Virtual memory size."
echo " VmLck: Locked memory size."
echo " VmHWM: Peak resident set size (\"high water mark\")."
echo " VmRSS: Resident set size."
echo " VmData, VmStk, VmExe: Size of data, stack, and text segments."
echo " VmLib: Shared library code size."
echo " VmPTE: Page table entries size (since Linux 2.6.10)."
echo
echo "The command is run under /usr/bin/time."
exit
fi
# code inspired by:
# http://stackoverflow.com/questions/1080461/
# /peak-memory-measurement-of-long-running-process-in-linux
function __measure_space_peak {
types="Peak Size Lck HWM RSS Data Stk Exe Lib PTE"
declare -A maxVm
for vm in $types; do maxVm[$vm]=0; done
ppid=$$
/usr/bin/time $@ &
tpid=`pgrep -P ${ppid} -n -f time`
if [[ ${tpid} -ne "" ]]; then
pid=`pgrep -P ${tpid} -n -f $1` # $! may work here but not later
fi
declare -A Vm
while [[ ${tpid} -ne "" ]]; do
for vm in $types; do
if [[ ${pid} -ne "" ]]; then
Vm[$vm]=`cat /proc/${pid}/status 2> /dev/null \
| grep Vm${vm} | awk '{print $2}'`
if [[ ${Vm[$vm]} -gt ${maxVm[$vm]} ]]; then
maxVm[$vm]=${Vm[$vm]}
fi
fi
done
sleep $sleeptime
savedtpid=${tpid}
tpid=`pgrep -P ${ppid} -n -f time`
done
wait ${savedtpid} # don't wait, job is finished
exitstatus=$? # catch the exit status of wait, the same of $@
echo "Memory usage for $@:" >> /dev/stderr
for vm in $types; do echo " Vm$vm: ${maxVm[$vm]} kB" >> /dev/stderr; done
echo "Exit status: ${exitstatus}" >> /dev/stderr
}
__measure_space_peak $*
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