mirror of
https://github.com/pmmp/PocketMine-MP.git
synced 2025-05-14 09:49:50 +00:00
498 lines
14 KiB
PHP
498 lines
14 KiB
PHP
<?php
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/*
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*
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* ____ _ _ __ __ _ __ __ ____
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* | _ \ ___ ___| | _____| |_| \/ (_)_ __ ___ | \/ | _ \
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* | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
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* | __/ (_) | (__| < __/ |_| | | | | | | | __/_____| | | | __/
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* |_| \___/ \___|_|\_\___|\__|_| |_|_|_| |_|\___| |_| |_|_|
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* @author PocketMine Team
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* @link http://www.pocketmine.net/
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*
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*
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*/
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declare(strict_types=1);
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namespace pocketmine;
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use pocketmine\event\server\LowMemoryEvent;
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use pocketmine\scheduler\DumpWorkerMemoryTask;
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use pocketmine\scheduler\GarbageCollectionTask;
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use pocketmine\timings\Timings;
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use pocketmine\utils\AssumptionFailedError;
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use pocketmine\utils\Process;
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use pocketmine\utils\Utils;
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use function arsort;
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use function count;
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use function fclose;
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use function file_exists;
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use function file_put_contents;
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use function fopen;
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use function fwrite;
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use function gc_collect_cycles;
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use function gc_disable;
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use function gc_enable;
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use function get_class;
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use function get_declared_classes;
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use function implode;
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use function ini_get;
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use function ini_set;
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use function is_array;
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use function is_object;
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use function is_resource;
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use function is_string;
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use function json_encode;
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use function min;
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use function mkdir;
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use function preg_match;
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use function print_r;
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use function round;
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use function spl_object_hash;
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use function sprintf;
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use function strlen;
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use function strtoupper;
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use function substr;
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use const JSON_PRETTY_PRINT;
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use const JSON_UNESCAPED_SLASHES;
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use const SORT_NUMERIC;
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class MemoryManager{
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/** @var Server */
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private $server;
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/** @var int */
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private $memoryLimit;
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/** @var int */
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private $globalMemoryLimit;
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/** @var int */
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private $checkRate;
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/** @var int */
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private $checkTicker = 0;
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/** @var bool */
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private $lowMemory = false;
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/** @var bool */
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private $continuousTrigger = true;
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/** @var int */
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private $continuousTriggerRate;
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/** @var int */
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private $continuousTriggerCount = 0;
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/** @var int */
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private $continuousTriggerTicker = 0;
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/** @var int */
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private $garbageCollectionPeriod;
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/** @var int */
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private $garbageCollectionTicker = 0;
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/** @var bool */
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private $garbageCollectionTrigger;
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/** @var bool */
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private $garbageCollectionAsync;
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/** @var int */
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private $lowMemChunkRadiusOverride;
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/** @var bool */
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private $lowMemChunkGC;
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/** @var bool */
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private $lowMemDisableChunkCache;
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/** @var bool */
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private $lowMemClearWorldCache;
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/** @var bool */
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private $dumpWorkers = true;
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/** @var \Logger */
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private $logger;
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public function __construct(Server $server){
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$this->server = $server;
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$this->logger = new \PrefixedLogger($server->getLogger(), "Memory Manager");
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$this->init();
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}
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private function init() : void{
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$this->memoryLimit = ((int) $this->server->getProperty("memory.main-limit", 0)) * 1024 * 1024;
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$defaultMemory = 1024;
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if(preg_match("/([0-9]+)([KMGkmg])/", $this->server->getConfigString("memory-limit", ""), $matches) > 0){
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$m = (int) $matches[1];
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if($m <= 0){
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$defaultMemory = 0;
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}else{
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switch(strtoupper($matches[2])){
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case "K":
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$defaultMemory = $m / 1024;
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break;
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case "M":
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$defaultMemory = $m;
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break;
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case "G":
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$defaultMemory = $m * 1024;
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break;
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default:
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$defaultMemory = $m;
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break;
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}
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}
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}
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$hardLimit = ((int) $this->server->getProperty("memory.main-hard-limit", $defaultMemory));
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if($hardLimit <= 0){
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ini_set("memory_limit", '-1');
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}else{
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ini_set("memory_limit", $hardLimit . "M");
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}
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$this->globalMemoryLimit = ((int) $this->server->getProperty("memory.global-limit", 0)) * 1024 * 1024;
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$this->checkRate = (int) $this->server->getProperty("memory.check-rate", 20);
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$this->continuousTrigger = (bool) $this->server->getProperty("memory.continuous-trigger", true);
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$this->continuousTriggerRate = (int) $this->server->getProperty("memory.continuous-trigger-rate", 30);
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$this->garbageCollectionPeriod = (int) $this->server->getProperty("memory.garbage-collection.period", 36000);
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$this->garbageCollectionTrigger = (bool) $this->server->getProperty("memory.garbage-collection.low-memory-trigger", true);
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$this->garbageCollectionAsync = (bool) $this->server->getProperty("memory.garbage-collection.collect-async-worker", true);
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$this->lowMemChunkRadiusOverride = (int) $this->server->getProperty("memory.max-chunks.chunk-radius", 4);
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$this->lowMemChunkGC = (bool) $this->server->getProperty("memory.max-chunks.trigger-chunk-collect", true);
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$this->lowMemDisableChunkCache = (bool) $this->server->getProperty("memory.world-caches.disable-chunk-cache", true);
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$this->lowMemClearWorldCache = (bool) $this->server->getProperty("memory.world-caches.low-memory-trigger", true);
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$this->dumpWorkers = (bool) $this->server->getProperty("memory.memory-dump.dump-async-worker", true);
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gc_enable();
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}
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public function isLowMemory() : bool{
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return $this->lowMemory;
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}
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public function getGlobalMemoryLimit() : int{
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return $this->globalMemoryLimit;
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}
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public function canUseChunkCache() : bool{
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return !$this->lowMemory or !$this->lowMemDisableChunkCache;
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}
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/**
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* Returns the allowed chunk radius based on the current memory usage.
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*/
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public function getViewDistance(int $distance) : int{
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return ($this->lowMemory and $this->lowMemChunkRadiusOverride > 0) ? min($this->lowMemChunkRadiusOverride, $distance) : $distance;
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}
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/**
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* Triggers garbage collection and cache cleanup to try and free memory.
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*/
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public function trigger(int $memory, int $limit, bool $global = false, int $triggerCount = 0) : void{
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$this->logger->debug(sprintf("%sLow memory triggered, limit %gMB, using %gMB",
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$global ? "Global " : "", round(($limit / 1024) / 1024, 2), round(($memory / 1024) / 1024, 2)));
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if($this->lowMemClearWorldCache){
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foreach($this->server->getWorldManager()->getWorlds() as $world){
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$world->clearCache(true);
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}
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}
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if($this->lowMemChunkGC){
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foreach($this->server->getWorldManager()->getWorlds() as $world){
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$world->doChunkGarbageCollection();
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}
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}
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$ev = new LowMemoryEvent($memory, $limit, $global, $triggerCount);
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$ev->call();
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$cycles = 0;
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if($this->garbageCollectionTrigger){
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$cycles = $this->triggerGarbageCollector();
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}
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$this->logger->debug(sprintf("Freed %gMB, $cycles cycles", round(($ev->getMemoryFreed() / 1024) / 1024, 2)));
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}
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/**
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* Called every tick to update the memory manager state.
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*/
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public function check() : void{
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Timings::$memoryManagerTimer->startTiming();
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if(($this->memoryLimit > 0 or $this->globalMemoryLimit > 0) and ++$this->checkTicker >= $this->checkRate){
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$this->checkTicker = 0;
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$memory = Process::getAdvancedMemoryUsage();
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$trigger = false;
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if($this->memoryLimit > 0 and $memory[0] > $this->memoryLimit){
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$trigger = 0;
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}elseif($this->globalMemoryLimit > 0 and $memory[1] > $this->globalMemoryLimit){
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$trigger = 1;
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}
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if($trigger !== false){
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if($this->lowMemory and $this->continuousTrigger){
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if(++$this->continuousTriggerTicker >= $this->continuousTriggerRate){
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$this->continuousTriggerTicker = 0;
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$this->trigger($memory[$trigger], $this->memoryLimit, $trigger > 0, ++$this->continuousTriggerCount);
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}
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}else{
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$this->lowMemory = true;
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$this->continuousTriggerCount = 0;
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$this->trigger($memory[$trigger], $this->memoryLimit, $trigger > 0);
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}
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}else{
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$this->lowMemory = false;
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}
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}
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if($this->garbageCollectionPeriod > 0 and ++$this->garbageCollectionTicker >= $this->garbageCollectionPeriod){
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$this->garbageCollectionTicker = 0;
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$this->triggerGarbageCollector();
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}
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Timings::$memoryManagerTimer->stopTiming();
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}
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public function triggerGarbageCollector() : int{
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Timings::$garbageCollectorTimer->startTiming();
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if($this->garbageCollectionAsync){
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$pool = $this->server->getAsyncPool();
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if(($w = $pool->shutdownUnusedWorkers()) > 0){
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$this->logger->debug("Shut down $w idle async pool workers");
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}
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foreach($pool->getRunningWorkers() as $i){
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$pool->submitTaskToWorker(new GarbageCollectionTask(), $i);
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}
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}
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$cycles = gc_collect_cycles();
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Timings::$garbageCollectorTimer->stopTiming();
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return $cycles;
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}
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/**
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* Dumps the server memory into the specified output folder.
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*/
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public function dumpServerMemory(string $outputFolder, int $maxNesting, int $maxStringSize) : void{
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$logger = new \PrefixedLogger($this->server->getLogger(), "Memory Dump");
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$logger->notice("After the memory dump is done, the server might crash");
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self::dumpMemory($this->server, $outputFolder, $maxNesting, $maxStringSize, $logger);
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if($this->dumpWorkers){
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$pool = $this->server->getAsyncPool();
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foreach($pool->getRunningWorkers() as $i){
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$pool->submitTaskToWorker(new DumpWorkerMemoryTask($outputFolder, $maxNesting, $maxStringSize), $i);
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}
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}
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}
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/**
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* Static memory dumper accessible from any thread.
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*
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* @param mixed $startingObject
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*/
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public static function dumpMemory($startingObject, string $outputFolder, int $maxNesting, int $maxStringSize, \Logger $logger) : void{
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$hardLimit = ini_get('memory_limit');
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if($hardLimit === false) throw new AssumptionFailedError("memory_limit INI directive should always exist");
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ini_set('memory_limit', '-1');
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gc_disable();
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if(!file_exists($outputFolder)){
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mkdir($outputFolder, 0777, true);
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}
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$obData = fopen($outputFolder . "/objects.js", "wb+");
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$data = [];
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$objects = [];
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$refCounts = [];
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$instanceCounts = [];
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$staticProperties = [];
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$staticCount = 0;
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foreach(get_declared_classes() as $className){
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$reflection = new \ReflectionClass($className);
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$staticProperties[$className] = [];
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foreach($reflection->getProperties() as $property){
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if(!$property->isStatic() or $property->getDeclaringClass()->getName() !== $className){
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continue;
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}
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if(!$property->isPublic()){
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$property->setAccessible(true);
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}
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$staticCount++;
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$staticProperties[$className][$property->getName()] = self::continueDump($property->getValue(), $objects, $refCounts, 0, $maxNesting, $maxStringSize);
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}
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if(count($staticProperties[$className]) === 0){
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unset($staticProperties[$className]);
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}
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}
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file_put_contents($outputFolder . "/staticProperties.js", json_encode($staticProperties, JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT));
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$logger->info("Wrote $staticCount static properties");
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if(isset($GLOBALS)){ //This might be null if we're on a different thread
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$globalVariables = [];
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$globalCount = 0;
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$ignoredGlobals = [
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'GLOBALS' => true,
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'_SERVER' => true,
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'_REQUEST' => true,
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'_POST' => true,
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'_GET' => true,
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'_FILES' => true,
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'_ENV' => true,
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'_COOKIE' => true,
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'_SESSION' => true
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];
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foreach($GLOBALS as $varName => $value){
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if(isset($ignoredGlobals[$varName])){
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continue;
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}
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$globalCount++;
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$globalVariables[$varName] = self::continueDump($value, $objects, $refCounts, 0, $maxNesting, $maxStringSize);
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}
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file_put_contents($outputFolder . "/globalVariables.js", json_encode($globalVariables, JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT));
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$logger->info("Wrote $globalCount global variables");
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}
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$data = self::continueDump($startingObject, $objects, $refCounts, 0, $maxNesting, $maxStringSize);
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do{
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$continue = false;
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foreach($objects as $hash => $object){
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if(!is_object($object)){
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continue;
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}
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$continue = true;
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$className = get_class($object);
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if(!isset($instanceCounts[$className])){
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$instanceCounts[$className] = 1;
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}else{
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$instanceCounts[$className]++;
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}
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$objects[$hash] = true;
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$reflection = new \ReflectionObject($object);
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$info = [
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"information" => "$hash@$className",
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"properties" => []
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];
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if(($parent = $reflection->getParentClass()) !== false){
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$info["parent"] = $parent->getName();
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}
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if(count($reflection->getInterfaceNames()) > 0){
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$info["implements"] = implode(", ", $reflection->getInterfaceNames());
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}
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for($original = $reflection; $reflection !== false; $reflection = $reflection->getParentClass()){
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foreach($reflection->getProperties() as $property){
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if($property->isStatic()){
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continue;
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}
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$name = $property->getName();
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if($reflection !== $original and !$property->isPublic()){
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$name = $reflection->getName() . ":" . $name;
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}
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if(!$property->isPublic()){
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$property->setAccessible(true);
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}
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$info["properties"][$name] = self::continueDump($property->getValue($object), $objects, $refCounts, 0, $maxNesting, $maxStringSize);
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}
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}
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fwrite($obData, "$hash@$className: " . json_encode($info, JSON_UNESCAPED_SLASHES) . "\n");
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}
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}while($continue);
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$logger->info("Wrote " . count($objects) . " objects");
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fclose($obData);
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file_put_contents($outputFolder . "/serverEntry.js", json_encode($data, JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT));
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file_put_contents($outputFolder . "/referenceCounts.js", json_encode($refCounts, JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT));
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arsort($instanceCounts, SORT_NUMERIC);
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file_put_contents($outputFolder . "/instanceCounts.js", json_encode($instanceCounts, JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT));
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$logger->info("Finished!");
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ini_set('memory_limit', $hardLimit);
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gc_enable();
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}
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/**
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* @param mixed $from
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* @param object[] $objects reference parameter
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* @param int[] $refCounts reference parameter
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*
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* @return mixed
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*/
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private static function continueDump($from, array &$objects, array &$refCounts, int $recursion, int $maxNesting, int $maxStringSize){
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if($maxNesting <= 0){
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return "(error) NESTING LIMIT REACHED";
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}
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--$maxNesting;
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if(is_object($from)){
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if(!isset($objects[$hash = spl_object_hash($from)])){
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$objects[$hash] = $from;
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$refCounts[$hash] = 0;
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}
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++$refCounts[$hash];
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$data = "(object) $hash@" . get_class($from);
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}elseif(is_array($from)){
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if($recursion >= 5){
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return "(error) ARRAY RECURSION LIMIT REACHED";
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}
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$data = [];
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foreach($from as $key => $value){
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$data[$key] = self::continueDump($value, $objects, $refCounts, $recursion + 1, $maxNesting, $maxStringSize);
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}
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}elseif(is_string($from)){
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$data = "(string) len(" . strlen($from) . ") " . substr(Utils::printable($from), 0, $maxStringSize);
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}elseif(is_resource($from)){
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$data = "(resource) " . print_r($from, true);
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}else{
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$data = $from;
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}
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return $data;
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}
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}
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