Add an active object step time budget #6721

This can be set via the active_object_interval option.

builtin/settingtypes.txt

@@ -1085,6 +1085,9 @@ active_block_mgmt_interval (Active Block Management interval) float 2.0
 #    Length of time between ABM execution cycles
 abm_interval (Active Block Modifier interval) float 1.0
 
+#    Length of time between active object step cycles
+active_object_interval (Active Object interval) float 0.1
+
 #    Length of time between NodeTimer execution cycles
 nodetimer_interval (NodeTimer interval) float 0.2
 

src/defaultsettings.cpp

@@ -345,6 +345,7 @@ void set_default_settings(Settings *settings)
 	settings->setDefault("dedicated_server_step", "0.09");
 	settings->setDefault("active_block_mgmt_interval", "2.0");
 	settings->setDefault("abm_interval", "1.0");
+	settings->setDefault("active_object_interval", "0.1");
 	settings->setDefault("nodetimer_interval", "0.2");
 	settings->setDefault("ignore_world_load_errors", "false");
 	settings->setDefault("remote_media", "");

src/environment.cpp

@@ -36,6 +36,7 @@ Environment::Environment(IGameDef *gamedef):
 	m_cache_enable_shaders = g_settings->getBool("enable_shaders");
 	m_cache_active_block_mgmt_interval = g_settings->getFloat("active_block_mgmt_interval");
 	m_cache_abm_interval = g_settings->getFloat("abm_interval");
+	m_cache_ao_interval = g_settings->getFloat("active_object_interval");
 	m_cache_nodetimer_interval = g_settings->getFloat("nodetimer_interval");
 
 	m_time_of_day = g_settings->getU32("world_start_time");

src/environment.h

@@ -136,6 +136,7 @@ class Environment
 	bool m_cache_enable_shaders;
 	float m_cache_active_block_mgmt_interval;
 	float m_cache_abm_interval;
+	float m_cache_ao_interval;
 	float m_cache_nodetimer_interval;
 
 	IGameDef *m_gamedef;

src/serverenvironment.cpp

@@ -279,17 +279,17 @@ void LBMManager::applyLBMs(ServerEnvironment *env, MapBlock *block, u32 stamp)
 
 void fillRadiusBlock(v3s16 p0, s16 r, std::set<v3s16> &list)
 {
+	const s16 r2 = r * r;
 	v3s16 p;
-	for(p.X=p0.X-r; p.X<=p0.X+r; p.X++)
-		for(p.Y=p0.Y-r; p.Y<=p0.Y+r; p.Y++)
-			for(p.Z=p0.Z-r; p.Z<=p0.Z+r; p.Z++)
-			{
-				// limit to a sphere
-				if (p.getDistanceFrom(p0) <= r) {
-					// Set in list
-					list.insert(p);
-				}
-			}
+	for (p.X = p0.X - r; p.X <= p0.X + r; p.X++)
+	for (p.Y = p0.Y - r; p.Y <= p0.Y + r; p.Y++)
+	for (p.Z = p0.Z - r; p.Z <= p0.Z + r; p.Z++) {
+		// limit to a sphere
+		if (p.getDistanceFromSQ(p0) <= r2) {
+			// Set in list
+			list.insert(p);
+		}
+	}
 }
 
 void fillViewConeBlock(v3s16 p0,
@@ -364,10 +364,7 @@ void ActiveBlockList::update(std::vector<PlayerSAO*> &active_players,
 	/*
 		Update m_list
 	*/
-	m_list.clear();
-	for (v3s16 p : newlist) {
-		m_list.insert(p);
-	}
+	m_list = newlist;
 }
 
 /*
@@ -1230,14 +1227,16 @@ void ServerEnvironment::step(float dtime)
 		}
 	}
 
+	// placeholder for the "real" time passed
+	float elapsed_time;
+
 	/*
 		Mess around in active blocks
 	*/
-	if (m_active_blocks_nodemetadata_interval.step(dtime, m_cache_nodetimer_interval)) {
+	if (m_active_blocks_nodemetadata_interval.step(dtime, m_cache_nodetimer_interval,
+			&elapsed_time)) {
 		ScopeProfiler sp(g_profiler, "SEnv: mess in act. blocks avg per interval", SPT_AVG);
 
-		float dtime = m_cache_nodetimer_interval;
-
 		for (const v3s16 &p: m_active_blocks.m_list) {
 			MapBlock *block = m_map->getBlockNoCreateNoEx(p);
 			if (!block)
@@ -1255,7 +1254,7 @@ void ServerEnvironment::step(float dtime)
 					MOD_REASON_BLOCK_EXPIRED);
 
 			// Run node timers
-			std::vector<NodeTimer> elapsed_timers = block->m_node_timers.step(dtime);
+			std::vector<NodeTimer> elapsed_timers = block->m_node_timers.step(elapsed_time);
 			if (!elapsed_timers.empty()) {
 				MapNode n;
 				v3s16 p2;
@@ -1271,18 +1270,14 @@ void ServerEnvironment::step(float dtime)
 		}
 	}
 
-	if (m_active_block_modifier_interval.step(dtime, m_cache_abm_interval))
+	if (m_active_block_modifier_interval.step(dtime,
+			m_cache_abm_interval * m_active_block_interval_overload_skip, &elapsed_time))
 		do { // breakable
-			if (m_active_block_interval_overload_skip > 0) {
-				ScopeProfiler sp(g_profiler, "SEnv: ABM overload skips");
-				m_active_block_interval_overload_skip--;
-				break;
-			}
 			ScopeProfiler sp(g_profiler, "SEnv: modify in blocks avg per interval", SPT_AVG);
 			TimeTaker timer("modify in active blocks per interval");
 
 			// Initialize handling of ActiveBlockModifiers
-			ABMHandler abmhandler(m_abms, m_cache_abm_interval, this, true);
+			ABMHandler abmhandler(m_abms, elapsed_time, this, true);
 
 			for (const v3s16 &p : m_active_blocks.m_abm_list) {
 				MapBlock *block = m_map->getBlockNoCreateNoEx(p);
@@ -1296,13 +1291,16 @@ void ServerEnvironment::step(float dtime)
 				abmhandler.apply(block);
 			}
 
-			u32 time_ms = timer.stop(true);
-			u32 max_time_ms = 200;
+			const u32 time_ms = timer.stop(true);
+			// allow up to 10% of the budget interval
+			const u32 max_time_ms = m_cache_abm_interval * 1000.0f * 0.1f;
 			if (time_ms > max_time_ms) {
-				warningstream<<"active block modifiers took "
-					<<time_ms<<"ms (longer than "
-					<<max_time_ms<<"ms)"<<std::endl;
-				m_active_block_interval_overload_skip = (time_ms / max_time_ms) + 1;
+				warningstream << "active block modifiers took "
+					<< time_ms << "ms (longer than "
+					<< max_time_ms << "ms)" << std::endl;
+				m_active_block_interval_overload_skip = ((float)time_ms / max_time_ms);
+			} else {
+				m_active_block_interval_overload_skip = 1.0f;
 			}
 		}while(0);
 
@@ -1314,15 +1312,17 @@ void ServerEnvironment::step(float dtime)
 	/*
 		Step active objects
 	*/
-	{
+	if (m_active_object_interval.step(dtime,
+			m_cache_ao_interval * m_active_object_interval_overload_skip, &elapsed_time)) {
+
 		ScopeProfiler sp(g_profiler, "SEnv: step act. objs avg", SPT_AVG);
-		//TimeTaker timer("Step active objects");
+		TimeTaker timer("Step active objects");
 
 		g_profiler->avg("SEnv: num of objects", m_active_objects.size());
 
 		// This helps the objects to send data at the same time
 		bool send_recommended = false;
-		m_send_recommended_timer += dtime;
+		m_send_recommended_timer += elapsed_time;
 		if(m_send_recommended_timer > getSendRecommendedInterval())
 		{
 			m_send_recommended_timer -= getSendRecommendedInterval();
@@ -1335,13 +1335,28 @@ void ServerEnvironment::step(float dtime)
 				continue;
 
 			// Step object
-			obj->step(dtime, send_recommended);
+			obj->step(elapsed_time, send_recommended);
 			// Read messages from object
 			while (!obj->m_messages_out.empty()) {
 				m_active_object_messages.push(obj->m_messages_out.front());
 				obj->m_messages_out.pop();
 			}
 		}
+
+		// calculate a simple moving average
+		m_avg_ao_time = m_avg_ao_time * 0.9f + timer.stop(true) * 0.1f;
+
+		// allow up to 20% of the budget interval
+		const float max_time_ms = m_cache_ao_interval * 1000.0f * 0.2f;
+		if (m_avg_ao_time > max_time_ms) {
+			warningstream << "active objects took "
+				<< m_avg_ao_time << "ms (longer than "
+				<< max_time_ms << "ms)" << std::endl;
+			// skip a few steps
+			m_active_object_interval_overload_skip = m_avg_ao_time / max_time_ms;
+		} else {
+			m_active_object_interval_overload_skip = 1.0f;
+		}
 	}
 
 	/*

src/serverenvironment.h

@@ -422,8 +422,11 @@ class ServerEnvironment : public Environment
 	ActiveBlockList m_active_blocks;
 	IntervalLimiter m_active_blocks_management_interval;
 	IntervalLimiter m_active_block_modifier_interval;
+	IntervalLimiter m_active_object_interval;
 	IntervalLimiter m_active_blocks_nodemetadata_interval;
-	int m_active_block_interval_overload_skip = 0;
+	float m_active_block_interval_overload_skip = 1.0f;
+	float m_active_object_interval_overload_skip = 1.0f;
+	float m_avg_ao_time = 0.0f;
 	// Time from the beginning of the game in seconds.
 	// Incremented in step().
 	u32 m_game_time = 0;

src/util/numeric.h

@@ -230,7 +230,7 @@ inline u32 calc_parity(u32 v)
 u64 murmur_hash_64_ua(const void *key, int len, unsigned int seed);
 
 bool isBlockInSight(v3s16 blockpos_b, v3f camera_pos, v3f camera_dir,
-		f32 camera_fov, f32 range, f32 *distance_ptr=NULL);
+		f32 camera_fov, f32 range, f32 *distance_ptr = NULL);
 
 s16 adjustDist(s16 dist, float zoom_fov);
 
@@ -291,18 +291,24 @@ class IntervalLimiter
 		return value:
 			true: action should be skipped
 			false: action should be done
+		if passed, the elapsed time since this method last returned true
+		is written to elapsed_ptr
 	*/
-	bool step(float dtime, float wanted_interval)
+	bool step(float dtime, float wanted_interval, float *elapsed_ptr = NULL)
 	{
 		m_accumulator += dtime;
+		if (elapsed_ptr)
+			*elapsed_ptr = m_accumulator - m_last_accumulator;
 		if (m_accumulator < wanted_interval)
 			return false;
 		m_accumulator -= wanted_interval;
+		m_last_accumulator = m_accumulator;
 		return true;
 	}
 
 private:
 	float m_accumulator = 0.0f;
+	float m_last_accumulator = 0.0f;
 };