Print high cpu thread jstack message

high_cpu_threads.sh

#!/bin/bash

usage() {
    echo "Usage: $0 -p <pid> [-n <thread number>]"    
}

# args check
while getopts ":p:n:" arg; do
    case "$arg" in
        p)
            PID=${OPTARG}            
            ;;
        n)
            NUM=${OPTARG}
            ;;
        *)
            usage
            ;;
    esac
done


# check process
if [[ -z $PID ]]; then
    usage
    exit
fi

# check process exists
if [[ -z "$(jps -l | grep $PID)" ]]; then
    echo "process of $PID is not exists"
    exit
fi
echo $NUM

if [[ -z $NUM ]]; then
    NUM=100
fi

JSTACKOUT=$(jstack $PID)
THREADS=$(ps -Tp $PID -o %cpu,tid,time | tail -n +2 | sort -rn | awk '{ if($1!="0.0") print $2}' | xargs printf "%x\n" | head -n $NUM  )

echo $THREADS

for tid in $THREADS; do
    echo "******************************************************************* ThreadId=$tid **************************************************************************"
    echo "$JSTACKOUT" | grep $tid -A 15
done