gfio: add preference entry for number of values to keep in graph

It's not really seconds, but pretty close since ETA interval is
close to that now. Will make it really seconds later.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/gfio.c b/gfio.c
index db59f4f25df8f73e378d908793d4d79344ed6267..c78d3af10ba7261084fdae7124d50751c99556ac 100644 (file)
--- a/gfio.c
+++ b/gfio.c
@@ -34,6 +34,7 @@
 
 static int gfio_server_running;
 static const char *gfio_graph_font;
+static unsigned int gfio_graph_limit = 100;
 
 static void view_log(GtkWidget *w, gpointer data);
 
@@ -185,7 +186,7 @@ static struct graph *setup_iops_graph(void)
        graph_add_label(g, "Write IOPS");
        graph_set_color(g, "Read IOPS", 0.13, 0.54, 0.13);
        graph_set_color(g, "Write IOPS", 1.0, 0.0, 0.0);
-       line_graph_set_data_count_limit(g, 100);
+       line_graph_set_data_count_limit(g, gfio_graph_limit);
        return g;
 }
 
@@ -2021,9 +2022,29 @@ static void view_log(GtkWidget *w, gpointer data)
        gtk_widget_show_all(win);
 }
 
+static void __update_graph_limits(struct gfio_graphs *g)
+{
+       line_graph_set_data_count_limit(g->iops_graph, gfio_graph_limit);
+       line_graph_set_data_count_limit(g->bandwidth_graph, gfio_graph_limit);
+}
+
+static void update_graph_limits(void)
+{
+       struct flist_head *entry;
+       struct gui_entry *ge;
+
+       __update_graph_limits(&main_ui.graphs);
+
+       flist_for_each(entry, &main_ui.list) {
+               ge = flist_entry(entry, struct gui_entry, list);
+               __update_graph_limits(&ge->graphs);
+       }
+}
+
 static void preferences(GtkWidget *w, gpointer data)
 {
        GtkWidget *dialog, *frame, *box, **buttons, *vbox, *font;
+       GtkWidget *hbox, *spin, *entry;
        int i;
 
        dialog = gtk_dialog_new_with_buttons("Preferences",
@@ -2056,7 +2077,7 @@ static void preferences(GtkWidget *w, gpointer data)
                gtk_box_pack_start(GTK_BOX(box), buttons[i], FALSE, FALSE, 6);
        }
 
-       frame = gtk_frame_new("Graph font");
+       frame = gtk_frame_new("Graphing");
        gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->vbox), frame, FALSE, FALSE, 5);
        vbox = gtk_vbox_new(FALSE, 6);
        gtk_container_add(GTK_CONTAINER(frame), vbox);
@@ -2064,6 +2085,16 @@ static void preferences(GtkWidget *w, gpointer data)
        font = gtk_font_button_new();
        gtk_box_pack_start(GTK_BOX(vbox), font, FALSE, FALSE, 5);
 
+       box = gtk_vbox_new(FALSE, 6);
+       gtk_box_pack_start(GTK_BOX(vbox), box, FALSE, FALSE, 5);
+
+       hbox = gtk_hbox_new(FALSE, 5);
+       gtk_box_pack_start(GTK_BOX(box), hbox, FALSE, FALSE, 5);
+       entry = gtk_label_new("Maximum number of data points in graph (seconds)");
+       gtk_box_pack_start(GTK_BOX(hbox), entry, FALSE, FALSE, 5);
+
+       spin = create_spinbutton(hbox, 10, 1000000, 100);
+
        gtk_widget_show_all(dialog);
 
        if (gtk_dialog_run(GTK_DIALOG(dialog)) != GTK_RESPONSE_ACCEPT) {
@@ -2080,6 +2111,9 @@ static void preferences(GtkWidget *w, gpointer data)
        }
 
        gfio_graph_font = strdup(gtk_font_button_get_font_name(GTK_FONT_BUTTON(font)));
+       gfio_graph_limit = gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(spin));
+       update_graph_limits();
+
        gtk_widget_destroy(dialog);
 }