查找CPU占用最高的进程

topcpu.sh

#!/bin/bash
# @Function
# TOP CPU Thread INFO.
#
#
#
PROG=`basename $0`
usage() {
cat <<EOF
Usage: ${PROG} [OPTION]...
Java top cpu print the stack of these threads.
Example: ${PROG} -c 10
Options:
-p, --pid java process(use jps find)
-c, --count set the thread count to show, default is 5
-h, --help display this help and exit
EOF
exit $1
}
ARGS=`getopt -n "$PROG" -a -o c:p:h -l count:,pid:,help -- "$@"`
[ $? -ne 0 ] && usage 1
eval set -- "${ARGS}"
while true; do
case "$1" in
-c|--count)
count="$2"
shift 2
;;
-p|--pid)
pid="$2"
shift 2
;;
-h|--help)
usage
;;
--)
shift
break
;;
esac
done
count=${count:-5}
redEcho() {
[ -c /dev/stdout ] && {
# if stdout is console, turn on color output.
echo -ne "\033[1;31m"
echo -n "$@"
echo -e "\033[0m"
} || echo "$@"
}
## Check the existence of jstack command!
if ! which jstack &> /dev/null; then
[ -n "$JAVA_HOME" ] && [ -f "$JAVA_HOME/bin/jstack" ] && [ -x "$JAVA_HOME/bin/jstack" ] && {
export PATH="$JAVA_HOME/bin:$PATH"
} || {
redEcho "Error: jstack not found on PATH and JAVA_HOME!"
exit 1
}
fi
uuid=`date +%s`_${RANDOM}_$$
cleanupWhenExit() {
rm /tmp/${uuid}_* &> /dev/null
}
trap "cleanupWhenExit" EXIT
printStackOfThread() {
while read threadLine ; do
pid=`echo ${threadLine} | awk '{print $1}'`
threadId=`echo ${threadLine} | awk '{print $2}'`
threadId0x=`printf %x ${threadId}`
user=`echo ${threadLine} | awk '{print $3}'`
pcpu=`echo ${threadLine} | awk '{print $5}'`
jstackFile=/tmp/${uuid}_${pid}
[ ! -f "${jstackFile}" ] && {
jstack ${pid} > ${jstackFile} || {
redEcho "Fail to jstack java process ${pid}!"
rm ${jstackFile}
continue
}
}
redEcho "The stack of busy(${pcpu}%) thread(${threadId}/0x${threadId0x}) of java process(${pid}) of user(${user}):"
sed "/nid=0x${threadId0x}/,/^$/p" -n ${jstackFile}
done
}
[ -z "${pid}" ] && {
ps -Leo pid,lwp,user,comm,pcpu --no-headers | awk '$4=="java"{print $0}' |
sort -k5 -r -n | head --lines "${count}" | printStackOfThread
} || {
ps -Leo pid,lwp,user,comm,pcpu --no-headers | awk -v "pid=${pid}" '$1==pid,$4=="java"{print $0}' |
sort -k5 -r -n | head --lines "${count}" | printStackOfThread
}

执行效果：