mariadb/poor-mans-profiler/pmprof

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#!/bin/bash
nsamples=30
sleeptime=1
pid=$(pidof loader-stress-test.tdb)
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/ { print s; s = ""; }
/^\#/ { if (s != "" ) { s = s "," $4} else { s = $4 } }
END { print s }' | \
sort | uniq -c | sort -r -n -k 1,1