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#!/bin/bash
# a poor man's profiler
# http://webcache.googleusercontent.com/search?q=cache:http://mituzas.lt/2009/02/15/poor-mans-contention-profiling/
nsamples=1
sleeptime=1
while [ $# -gt 0 ] ; do
arg=$1;
if [[ $arg =~ --(.*)=(.*) ]] ; then
eval ${BASH_REMATCH[1]}=${BASH_REMATCH[2]}
else
break
fi
shift
done
pid=$1
for x in $(seq 1 $nsamples)
do
gdb -ex "set pagination 0" -ex "thread apply all bt" -batch -p $pid
sleep $sleeptime
done | \
awk '
BEGIN { s = ""; }
/^Thread/ { if (s != "") print s; s = ""; }
/^\#/ { if ($3 == "in") { v = $4; } else { v = $2 } if (s != "" ) { s = s "," v} else { s = v } }
END { print s }' | \
sort | uniq -c | sort -r -n -k 1,1
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