}

	label = append(label, fmt.Sprintf("Showing nodes accounting for %s, %s of %s total", rpt.formatValue(flatSum), strings.TrimSpace(measurement.Percentage(flatSum, rpt.total)), rpt.formatValue(rpt.total)))

	if rpt.total != 0 {
		if droppedNodes > 0 {
			label = append(label, genLabel(droppedNodes, "node", "cum",
				rpt.formatValue(abs64(int64(float64(rpt.total)*nodeFraction)))))
		}
		if droppedEdges > 0 {

type DotConfig struct {
	Title     string   // The title of the DOT graph
	LegendURL string   // The URL to link to from the legend.
	Labels    []string // The labels for the DOT's legend

	FormatValue func(int64) string // A formatting function for values
	Total       int64              // The total weight of the graph, used to compute percentages
}

			fnodes, _, err := getSourceFromFile(filename, reader, fns, 0, 0)
			fmt.Fprintf(w, "ROUTINE ======================== %s in %s\n", name, filename)
			fmt.Fprintf(w, "%10s %10s (flat, cum) %s of Total\n",
				rpt.formatValue(flatSum), rpt.formatValue(cumSum),
				measurement.Percentage(cumSum, rpt.total))

			if err != nil {
				fmt.Fprintf(w, " Error: %v\n", err)
				continue
			}

			for _, fn := range fnodes {