statistics: clarify CPU/processor graph by removing "idle" from it

Clarify the CPU time consumption graph by removing the "idle" data from it.
Especially with light traffic, removing "idle" enables the graph
to scale better and to properly show the CPU load variations.

If "idle" data needs to be seen, it might be added as a second graph below.

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>
(cherry picked from commit 5ce647746e584bc10ce5238126bd6ec933fcf609)

diff --git a/applications/luci-app-statistics/luasrc/statistics/rrdtool/definitions/cpu.lua b/applications/luci-app-statistics/luasrc/statistics/rrdtool/definitions/cpu.lua
index bee2ed4..ae0c0ce 100644 (file)
--- a/applications/luci-app-statistics/luasrc/statistics/rrdtool/definitions/cpu.lua
+++ b/applications/luci-app-statistics/luasrc/statistics/rrdtool/definitions/cpu.lua
@@ -8,11 +8,12 @@ function rrdargs( graph, plugin, plugin_instance, dtype )
        return {
                title = "%H: Processor usage on core #%pi",
                y_min = "0",
+               alt_autoscale_max = true,
                vlabel = "Percent",
                number_format = "%5.1lf%%",
                data = {
                        instances = { 
-                               cpu = { "idle", "user", "nice", "system", "softirq", "interrupt" }
+                               cpu = { "user", "nice", "system", "softirq", "interrupt" }
                        },
 
                        options = {