monitor process state by pid

pidstat.sh

#!/usr/bin/env bash

# Thread state
#  pidstat -dhut -p <PID>
#  top -bcH -n 1 -p <PID>
#  pstree -ps <PID>

pname=${1}
if [ -z "${pname}" ] || [[ "${pname}" =~ [-](h|H|[-]?help) ]]; then
    echo -e "Error: need input a process name or pid\n"
    echo "Usage:"
    echo -e "\tpidstat.sh <process name|pid> [interval [count]]"
    echo "Example:"
    echo -e "\tpidstat.sh apimgr 1 5"
    echo -e "\tpidstat.sh statistics 10"
    echo -e "\tpidstat.sh \`pidof apimgr\` 1 10 > apimgr.stats"
    exit 1
fi


interval=${2}
if [ -z "${interval}" ] || [[ ! "${interval}" =~ [0-9]+ ]] || [ ${interval} -le 0 ]; then
    interval=1
fi

count=$3
if [ -n "${count}" ]; then
    if [[ ! "${count}" =~ [0-9]+ ]] || [ ${count} -le 0 ]; then
        count=1
    fi
else
    count=1
fi

pidstat -dhIrsu -p SELF | grep '^#'

if [[ "${pname}" =~ [0-9]+ ]]; then
    pids="-p ${pname}"
else
    pids="-C ${pname}"
fi

x=0
while [ ${x} -lt ${count} ]; do
    pidstat -dhIrsu ${pids} 1 1 | grep -Ev '^Linux|^#|^$'
    sleep ${interval}
    x=$((x+1))
done