#!/bin/ksh
#
# strip_stack by Tanel Poder (www.tanelpoder.com)
#
# strips program counter function offsets and aggregates dtrace stack sampler output
#
# usage: strip_stack <filename>
# 

cat $1 | sed 's/^ *//;s/+.*$//' | \
        awk '/^$/{ printf "\n" }/^[0-9]*$/{ printf ";%s", $1 }/[a-z]/{ printf "%s<-", $1 }END{ printf "\n" }' | \
        sort | \
	awk -F";" '
            /NR==1/{ sum=0; total=0; oldstack=$2 }
            { 
              if (oldstack==$2) {sum+=$3;total+=$3} 
              else {printf "%d %s\n", sum, oldstack; oldstack=$2; sum=$3} 
            }
            END {printf "%d %s\n%d total samples\n", sum, oldstack,total}
        ' | \
        sort -bnr