Created
September 5, 2019 07:21
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Script to match /proc/PID data with jstack
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#!/bin/bash | |
PID=$1 | |
CPUFILE=/tmp/cpu-$PID-0 | |
LASTFILE=/tmp/cpu-$PID-1 | |
>$LASTFILE | |
function cleanup { rm $CPUFILE $LASTFILE ; } | |
trap cleanup EXIT | |
cd /proc/${PID}/task/ | |
while : | |
do | |
echo | |
for TID in * | |
do | |
CPU=$(grep se.sum_exec_runtime $TID/sched ) 2>/dev/null | |
[ "$CPU" = "" ] || echo $TID $CPU | |
done | sed 's/[a-z_\.]* : //' | sort -g > $CPUFILE | |
LINE=$(join $LASTFILE $CPUFILE | while read TID LAST CPU | |
do | |
TICK=$(echo $CPU - $LAST | bc -q) | |
[ "$TICK" = "0" ] || echo $TICK $TID | |
done | sed 's/^\./0./' | sort -gr | head -20 | sed 's/^\(.*\) \(.*\)$/\2=\1/' ) | |
cp $CPUFILE $LASTFILE | |
echo $(date +'%Y-%m-%d %H:%M:%S'):$PID: $LINE | |
TOP=$(printf '%x' $(echo $LINE | cut -d= -f1 )) | |
jstack $PID | awk "BEGIN { found=0 } /nid=0x$TOP/ { found=1; } /^$/ { found=0;} { if (found==1) print \$0 ; } " | |
sleep 2 | |
done |
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