add stacks_to_flames.sh

stacks_to_flames.sh

@@ -0,0 +1,18 @@
+#!/bin/zsh
+
+# This scripts renders separate flame graphs for each process in the file at the first argument
+# Canvas sizes are tuned relatively to the longest running process (max is $maxwidth)
+
+# usage:
+# deps/eflame/stacks_to_flames.sh stacks.out
+
+me="$(dirname $0)"
+f=${1:-stacks.out}
+maxwidth=${maxwidth:-1430}
+
+for width pid in $(awk -F';' '{print $1}' $f | uniq -c | tr -d '<>' | sort -rn -k1); do
+	max=${max:-$width.0}
+	echo -n "pid: $pid\tsamples: $width\t"
+	grep $pid $f | $me/flamegraph.pl --title="$title ($pid)" --width=$(($maxwidth / $max * $width)) > flame_$pid.svg
+	echo flame_$pid.svg
+done