USAGE: /usr/bin/flamegraph.pl [options] infile > outfile.svg

	--title TEXT     # change title text
	--subtitle TEXT  # second level title (optional)
	--width NUM      # width of image (default 1200)
	--height NUM     # height of each frame (default 16)
	--minwidth NUM   # omit smaller functions (default 0.1 pixels)
	--fonttype FONT  # font type (default "Verdana")
	--fontsize NUM   # font size (default 12)
	--countname TEXT # count type label (default "samples")
	--nametype TEXT  # name type label (default "Function:")
	--colors PALETTE # set color palette. choices are: hot (default), mem,
	                 # io, wakeup, chain, java, js, perl, red, green, blue,
	                 # aqua, yellow, purple, orange
	--hash           # colors are keyed by function name hash
	--cp             # use consistent palette (palette.map)
	--reverse        # generate stack-reversed flame graph
	--inverted       # icicle graph
	--negate         # switch differential hues (blue<->red)
	--notes TEXT     # add notes comment in SVG (for debugging)
	--help           # this message

	eg,
	/usr/bin/flamegraph.pl --title="Flame Graph: malloc()" trace.txt > graph.svg