add entites.on_step metric

builtin/on_step.lua

@@ -0,0 +1,29 @@
+local metric = monitoring.counter("entity_on_step_count", "Entity on_step call count")
+
+local metric_time = monitoring.counter("entity_on_step_time", "time usage in microseconds for on_step calls")
+local metric_time_max = monitoring.gauge(
+	"entity_on_step_time_max",
+	"max time usage in microseconds for on_step calls",
+	{ autoflush=true }
+)
+
+
+minetest.register_on_mods_loaded(function()
+	for _, entity in pairs(minetest.registered_entities) do
+		if type(entity.on_step) == "function" then
+			local old_on_step = entity.on_step
+			entity.on_step = function(...)
+				local t0 = minetest.get_us_time()
+				local result = old_on_step(...)
+				local t1 = minetest.get_us_time()
+
+				local diff = t1 - t0
+	      metric_time.inc(diff)
+	      metric_time_max.setmax(diff)
+				metric.inc()
+
+				return result
+			end
+		end
+	end
+end)

init.lua

@@ -63,6 +63,7 @@ if not monitoring.settings.builtin_disable then
   dofile(MP.."/builtin/nodetimer_calls.lua")
   dofile(MP.."/builtin/on_joinplayer.lua")
   dofile(MP.."/builtin/on_prejoinplayer.lua")
+  dofile(MP.."/builtin/on_step.lua")
   dofile(MP.."/builtin/playercount.lua")
   dofile(MP.."/builtin/protection_violation_count.lua")
   dofile(MP.."/builtin/punchplayer.lua")

settingtypes.txt

@@ -0,0 +1 @@
+monitoring.prometheus_push_url (monitoring push url) string