Created
September 20, 2014 11:47
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dump the thread stack which the most wasted of CPU
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#!/bin/bash | |
if [ $# -eq 0 ];then | |
echo "please enter java pid" | |
exit -1 | |
fi | |
pid=$1 | |
jstack_cmd="" | |
if [[ $JAVA_HOME != "" ]]; then | |
jstack_cmd="$JAVA_HOME/bin/jstack" | |
else | |
r=`which jstack 2>/dev/null` | |
if [[ $r != "" ]]; then | |
jstack_cmd=$r | |
else | |
echo "can not find jstack" | |
exit -2 | |
fi | |
fi | |
#line=`top -H -o %CPU -b -n 1 -p $pid | sed '1,/^$/d' | grep -v $pid | awk 'NR==2'` | |
line=`top -H -b -n 1 -p $pid | sed '1,/^$/d' | sed '1d;/^$/d' | grep -v $pid | sort -nrk9 | head -1` | |
echo "$line" | awk '{print "tid: "$1," cpu: %"$9}' | |
tid_0x=`printf "%0x" $(echo "$line" | awk '{print $1}')` | |
$jstack_cmd $pid | grep $tid_0x -A20 | sed -n '1,/^$/p' |
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