X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=graph.c;h=837211dacebdb4f47defcc6e5b02ce9149c0b25c;hp=7dbfd357bde0b0296501897a3096df8a0a6c9799;hb=5aec66804d2a6d60aee8d973680c69b13c1d34a3;hpb=9af4a24408ea7d4cea084a4fe214b81145cc36ac

diff --git a/graph.c b/graph.c
index 7dbfd357..837211da 100644
--- a/graph.c
+++ b/graph.c
@@ -525,6 +525,15 @@ void line_graph_draw(struct graph *g, cairo_t *cr)
 	minx = find_xy_value(g, getx, mindouble);
 	maxx = find_xy_value(g, getx, maxdouble);
 	miny = find_xy_value(g, gety, mindouble);
+
+	/*
+	 * Start graphs at zero, unless we have a value below. Otherwise
+	 * it's hard to visually compare the read and write graph, since
+	 * the lowest valued one will be the floor of the graph view.
+	 */
+	if (miny > 0)
+		miny = 0;
+
 	maxy = find_xy_value(g, gety, maxdouble);
 
 	if (fabs(maxx - minx) < 1e-20 || fabs(maxy - miny) < 1e-20) {