1291 lines
40 KiB
PHP
1291 lines
40 KiB
PHP
<?php
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/**
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* @file src/Core/Worker.php
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*/
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namespace Friendica\Core;
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use Friendica\BaseObject;
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use Friendica\Database\DBA;
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use Friendica\Model\Process;
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use Friendica\Util\DateTimeFormat;
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use Friendica\Util\Logger\WorkerLogger;
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use Friendica\Util\Network;
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/**
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* @file src/Core/Worker.php
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*
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* @brief Contains the class for the worker background job processing
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*/
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/**
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* @brief Worker methods
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*/
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class Worker
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{
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const STATE_STARTUP = 1; // Worker is in startup. This takes most time.
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const STATE_LONG_LOOP = 2; // Worker is processing the whole - long - loop.
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const STATE_REFETCH = 3; // Worker had refetched jobs in the execution loop.
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const STATE_SHORT_LOOP = 4; // Worker is processing preassigned jobs, thus saving much time.
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private static $up_start;
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private static $db_duration = 0;
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private static $db_duration_count = 0;
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private static $db_duration_write = 0;
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private static $db_duration_stat = 0;
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private static $lock_duration = 0;
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private static $last_update;
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private static $state;
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/**
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* @brief Processes the tasks that are in the workerqueue table
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*
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* @param boolean $run_cron Should the cron processes be executed?
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* @return void
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public static function processQueue($run_cron = true)
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{
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$a = \get_app();
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// Ensure that all "strtotime" operations do run timezone independent
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date_default_timezone_set('UTC');
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self::$up_start = microtime(true);
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// At first check the maximum load. We shouldn't continue with a high load
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if ($a->isMaxLoadReached()) {
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Logger::log('Pre check: maximum load reached, quitting.', Logger::DEBUG);
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return;
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}
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// We now start the process. This is done after the load check since this could increase the load.
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self::startProcess();
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// Kill stale processes every 5 minutes
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$last_cleanup = Config::get('system', 'worker_last_cleaned', 0);
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if (time() > ($last_cleanup + 300)) {
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Config::set('system', 'worker_last_cleaned', time());
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self::killStaleWorkers();
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}
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// Count active workers and compare them with a maximum value that depends on the load
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if (self::tooMuchWorkers()) {
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Logger::log('Pre check: Active worker limit reached, quitting.', Logger::DEBUG);
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return;
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}
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// Do we have too few memory?
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if ($a->isMinMemoryReached()) {
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Logger::log('Pre check: Memory limit reached, quitting.', Logger::DEBUG);
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return;
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}
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// Possibly there are too much database connections
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if (self::maxConnectionsReached()) {
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Logger::log('Pre check: maximum connections reached, quitting.', Logger::DEBUG);
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return;
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}
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// Possibly there are too much database processes that block the system
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if ($a->isMaxProcessesReached()) {
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Logger::log('Pre check: maximum processes reached, quitting.', Logger::DEBUG);
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return;
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}
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// Now we start additional cron processes if we should do so
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if ($run_cron) {
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self::runCron();
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}
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$starttime = time();
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self::$state = self::STATE_STARTUP;
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// We fetch the next queue entry that is about to be executed
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while ($r = self::workerProcess()) {
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$refetched = false;
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foreach ($r as $entry) {
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// Assure that the priority is an integer value
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$entry['priority'] = (int)$entry['priority'];
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// The work will be done
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if (!self::execute($entry)) {
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Logger::log('Process execution failed, quitting.', Logger::DEBUG);
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return;
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}
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// Trying to fetch new processes - but only once when successful
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if (!$refetched && Lock::acquire('worker_process', 0)) {
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self::findWorkerProcesses();
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Lock::release('worker_process');
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self::$state = self::STATE_REFETCH;
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$refetched = true;
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} else {
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self::$state = self::STATE_SHORT_LOOP;
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}
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}
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// To avoid the quitting of multiple workers only one worker at a time will execute the check
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if (!self::getWaitingJobForPID()) {
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self::$state = self::STATE_LONG_LOOP;
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if (Lock::acquire('worker', 0)) {
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// Count active workers and compare them with a maximum value that depends on the load
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if (self::tooMuchWorkers()) {
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Logger::log('Active worker limit reached, quitting.', Logger::DEBUG);
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Lock::release('worker');
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return;
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}
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// Check free memory
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if ($a->isMinMemoryReached()) {
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Logger::log('Memory limit reached, quitting.', Logger::DEBUG);
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Lock::release('worker');
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return;
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}
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Lock::release('worker');
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}
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}
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// Quit the worker once every cron interval
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if (time() > ($starttime + (Config::get('system', 'cron_interval') * 60))) {
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Logger::info('Process lifetime reached, respawning.');
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self::spawnWorker();
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return;
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}
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}
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// Cleaning up. Possibly not needed, but it doesn't harm anything.
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if (Config::get('system', 'worker_daemon_mode', false)) {
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self::IPCSetJobState(false);
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}
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Logger::log("Couldn't select a workerqueue entry, quitting process " . getmypid() . ".", Logger::DEBUG);
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}
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/**
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* @brief Check if non executed tasks do exist in the worker queue
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*
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* @return boolean Returns "true" if tasks are existing
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* @throws \Exception
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*/
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private static function entriesExists()
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{
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$stamp = (float)microtime(true);
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$exists = DBA::exists('workerqueue', ["NOT `done` AND `pid` = 0 AND `next_try` < ?", DateTimeFormat::utcNow()]);
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self::$db_duration += (microtime(true) - $stamp);
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return $exists;
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}
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/**
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* @brief Returns the number of deferred entries in the worker queue
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*
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* @return integer Number of deferred entries in the worker queue
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* @throws \Exception
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*/
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private static function deferredEntries()
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{
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$stamp = (float)microtime(true);
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$count = DBA::count('workerqueue', ["NOT `done` AND `pid` = 0 AND `next_try` > ?", DateTimeFormat::utcNow()]);
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self::$db_duration += (microtime(true) - $stamp);
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self::$db_duration_count += (microtime(true) - $stamp);
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return $count;
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}
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/**
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* @brief Returns the number of non executed entries in the worker queue
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*
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* @return integer Number of non executed entries in the worker queue
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* @throws \Exception
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*/
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private static function totalEntries()
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{
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$stamp = (float)microtime(true);
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$count = DBA::count('workerqueue', ['done' => false, 'pid' => 0]);
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self::$db_duration += (microtime(true) - $stamp);
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self::$db_duration_count += (microtime(true) - $stamp);
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return $count;
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}
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/**
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* @brief Returns the highest priority in the worker queue that isn't executed
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*
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* @return integer Number of active worker processes
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* @throws \Exception
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*/
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private static function highestPriority()
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{
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$stamp = (float)microtime(true);
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$condition = ["`pid` = 0 AND NOT `done` AND `next_try` < ?", DateTimeFormat::utcNow()];
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$workerqueue = DBA::selectFirst('workerqueue', ['priority'], $condition, ['order' => ['priority']]);
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self::$db_duration += (microtime(true) - $stamp);
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if (DBA::isResult($workerqueue)) {
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return $workerqueue["priority"];
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} else {
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return 0;
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}
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}
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/**
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* @brief Returns if a process with the given priority is running
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*
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* @param integer $priority The priority that should be checked
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*
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* @return integer Is there a process running with that priority?
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* @throws \Exception
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*/
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private static function processWithPriorityActive($priority)
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{
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$condition = ["`priority` <= ? AND `pid` != 0 AND NOT `done`", $priority];
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return DBA::exists('workerqueue', $condition);
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}
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/**
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* @brief Execute a worker entry
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*
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* @param array $queue Workerqueue entry
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*
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* @return boolean "true" if further processing should be stopped
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public static function execute($queue)
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{
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$a = \get_app();
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$mypid = getmypid();
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// Quit when in maintenance
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if (Config::get('system', 'maintenance', false, true)) {
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Logger::log("Maintenance mode - quit process ".$mypid, Logger::DEBUG);
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return false;
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}
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// Constantly check the number of parallel database processes
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if ($a->isMaxProcessesReached()) {
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Logger::log("Max processes reached for process ".$mypid, Logger::DEBUG);
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return false;
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}
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// Constantly check the number of available database connections to let the frontend be accessible at any time
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if (self::maxConnectionsReached()) {
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Logger::log("Max connection reached for process ".$mypid, Logger::DEBUG);
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return false;
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}
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$argv = json_decode($queue["parameter"], true);
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// Check for existance and validity of the include file
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$include = $argv[0];
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if (method_exists(sprintf('Friendica\Worker\%s', $include), 'execute')) {
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// We constantly update the "executed" date every minute to avoid being killed too soon
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if (!isset(self::$last_update)) {
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self::$last_update = strtotime($queue["executed"]);
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}
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$age = (time() - self::$last_update) / 60;
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self::$last_update = time();
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if ($age > 1) {
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$stamp = (float)microtime(true);
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DBA::update('workerqueue', ['executed' => DateTimeFormat::utcNow()], ['pid' => $mypid, 'done' => false]);
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self::$db_duration += (microtime(true) - $stamp);
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self::$db_duration_write += (microtime(true) - $stamp);
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}
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array_shift($argv);
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self::execFunction($queue, $include, $argv, true);
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$stamp = (float)microtime(true);
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$condition = ["`id` = ? AND `next_try` < ?", $queue['id'], DateTimeFormat::utcNow()];
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if (DBA::update('workerqueue', ['done' => true], $condition)) {
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Config::set('system', 'last_worker_execution', DateTimeFormat::utcNow());
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}
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self::$db_duration = (microtime(true) - $stamp);
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self::$db_duration_write += (microtime(true) - $stamp);
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return true;
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}
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// The script could be provided as full path or only with the function name
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if ($include == basename($include)) {
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$include = "include/".$include.".php";
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}
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if (!validate_include($include)) {
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Logger::log("Include file ".$argv[0]." is not valid!");
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$stamp = (float)microtime(true);
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DBA::delete('workerqueue', ['id' => $queue["id"]]);
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self::$db_duration = (microtime(true) - $stamp);
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self::$db_duration_write += (microtime(true) - $stamp);
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return true;
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}
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require_once $include;
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$funcname = str_replace(".php", "", basename($argv[0]))."_run";
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if (function_exists($funcname)) {
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// We constantly update the "executed" date every minute to avoid being killed too soon
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if (!isset(self::$last_update)) {
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self::$last_update = strtotime($queue["executed"]);
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}
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$age = (time() - self::$last_update) / 60;
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self::$last_update = time();
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if ($age > 1) {
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$stamp = (float)microtime(true);
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DBA::update('workerqueue', ['executed' => DateTimeFormat::utcNow()], ['pid' => $mypid, 'done' => false]);
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self::$db_duration += (microtime(true) - $stamp);
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self::$db_duration_write += (microtime(true) - $stamp);
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}
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self::execFunction($queue, $funcname, $argv, false);
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$stamp = (float)microtime(true);
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if (DBA::update('workerqueue', ['done' => true], ['id' => $queue["id"]])) {
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Config::set('system', 'last_worker_execution', DateTimeFormat::utcNow());
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}
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self::$db_duration = (microtime(true) - $stamp);
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self::$db_duration_write += (microtime(true) - $stamp);
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} else {
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Logger::log("Function ".$funcname." does not exist");
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$stamp = (float)microtime(true);
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DBA::delete('workerqueue', ['id' => $queue["id"]]);
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self::$db_duration = (microtime(true) - $stamp);
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self::$db_duration_write += (microtime(true) - $stamp);
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}
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return true;
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}
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/**
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* @brief Execute a function from the queue
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*
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* @param array $queue Workerqueue entry
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* @param string $funcname name of the function
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* @param array $argv Array of values to be passed to the function
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* @param boolean $method_call boolean
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* @return void
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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private static function execFunction($queue, $funcname, $argv, $method_call)
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{
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$a = \get_app();
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$argc = count($argv);
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$logger = $a->getLogger();
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$workerLogger = new WorkerLogger($logger, $funcname);
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$workerLogger ->info("Process start.", ['priority' => $queue["priority"], 'id' => $queue["id"]]);
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$stamp = (float)microtime(true);
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// We use the callstack here to analyze the performance of executed worker entries.
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// For this reason the variables have to be initialized.
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$a->getProfiler()->reset();
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$a->queue = $queue;
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$up_duration = microtime(true) - self::$up_start;
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// Reset global data to avoid interferences
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unset($_SESSION);
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// Set the workerLogger as new default logger
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Logger::init($workerLogger);
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if ($method_call) {
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call_user_func_array(sprintf('Friendica\Worker\%s::execute', $funcname), $argv);
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} else {
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$funcname($argv, $argc);
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}
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Logger::init($logger);
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unset($a->queue);
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$duration = (microtime(true) - $stamp);
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/* With these values we can analyze how effective the worker is.
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* The database and rest time should be low since this is the unproductive time.
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* The execution time is the productive time.
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* By changing parameters like the maximum number of workers we can check the effectivness.
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*/
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$dbtotal = round(self::$db_duration, 2);
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$dbread = round(self::$db_duration - (self::$db_duration_count + self::$db_duration_write + self::$db_duration_stat), 2);
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$dbcount = round(self::$db_duration_count, 2);
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$dbstat = round(self::$db_duration_stat, 2);
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$dbwrite = round(self::$db_duration_write, 2);
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$dblock = round(self::$lock_duration, 2);
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$rest = round(max(0, $up_duration - (self::$db_duration + self::$lock_duration)), 2);
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$exec = round($duration, 2);
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$logger->info('Performance:', ['state' => self::$state, 'count' => $dbcount, 'stat' => $dbstat, 'write' => $dbwrite, 'lock' => $dblock, 'total' => $dbtotal, 'rest' => $rest, 'exec' => $exec]);
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self::$up_start = microtime(true);
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self::$db_duration = 0;
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self::$db_duration_count = 0;
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self::$db_duration_stat = 0;
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self::$db_duration_write = 0;
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self::$lock_duration = 0;
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if ($duration > 3600) {
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$logger->info('Longer than 1 hour.', ['priority' => $queue["priority"], 'id' => $queue["id"], 'duration' => round($duration/60, 3)]);
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} elseif ($duration > 600) {
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$logger->info('Longer than 10 minutes.', ['priority' => $queue["priority"], 'id' => $queue["id"], 'duration' => round($duration/60, 3)]);
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} elseif ($duration > 300) {
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$logger->info('Longer than 5 minutes.', ['priority' => $queue["priority"], 'id' => $queue["id"], 'duration' => round($duration/60, 3)]);
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} elseif ($duration > 120) {
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$logger->info('Longer than 2 minutes.', ['priority' => $queue["priority"], 'id' => $queue["id"], 'duration' => round($duration/60, 3)]);
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}
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$workerLogger->info('Process done.', ['priority' => $queue["priority"], 'id' => $queue["id"], 'duration' => round($duration, 3)]);
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$a->getProfiler()->saveLog($a->getLogger(), "ID " . $queue["id"] . ": " . $funcname);
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$cooldown = Config::get("system", "worker_cooldown", 0);
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if ($cooldown > 0) {
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$logger->info('Cooldown.', ['priority' => $queue["priority"], 'id' => $queue["id"], 'cooldown' => $cooldown]);
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sleep($cooldown);
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}
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}
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/**
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* @brief Checks if the number of database connections has reached a critical limit.
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*
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* @return bool Are more than 3/4 of the maximum connections used?
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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private static function maxConnectionsReached()
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{
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// Fetch the max value from the config. This is needed when the system cannot detect the correct value by itself.
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$max = Config::get("system", "max_connections");
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// Fetch the percentage level where the worker will get active
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$maxlevel = Config::get("system", "max_connections_level", 75);
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if ($max == 0) {
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// the maximum number of possible user connections can be a system variable
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$r = DBA::fetchFirst("SHOW VARIABLES WHERE `variable_name` = 'max_user_connections'");
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if (DBA::isResult($r)) {
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$max = $r["Value"];
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}
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// Or it can be granted. This overrides the system variable
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$stamp = (float)microtime(true);
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$r = DBA::p('SHOW GRANTS');
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self::$db_duration += (microtime(true) - $stamp);
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while ($grants = DBA::fetch($r)) {
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$grant = array_pop($grants);
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if (stristr($grant, "GRANT USAGE ON")) {
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if (preg_match("/WITH MAX_USER_CONNECTIONS (\d*)/", $grant, $match)) {
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$max = $match[1];
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}
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}
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}
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DBA::close($r);
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}
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// If $max is set we will use the processlist to determine the current number of connections
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// The processlist only shows entries of the current user
|
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if ($max != 0) {
|
|
$stamp = (float)microtime(true);
|
|
$r = DBA::p('SHOW PROCESSLIST');
|
|
self::$db_duration += (microtime(true) - $stamp);
|
|
$used = DBA::numRows($r);
|
|
DBA::close($r);
|
|
|
|
Logger::log("Connection usage (user values): ".$used."/".$max, Logger::DEBUG);
|
|
|
|
$level = ($used / $max) * 100;
|
|
|
|
if ($level >= $maxlevel) {
|
|
Logger::log("Maximum level (".$maxlevel."%) of user connections reached: ".$used."/".$max);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// We will now check for the system values.
|
|
// This limit could be reached although the user limits are fine.
|
|
$r = DBA::fetchFirst("SHOW VARIABLES WHERE `variable_name` = 'max_connections'");
|
|
if (!DBA::isResult($r)) {
|
|
return false;
|
|
}
|
|
$max = intval($r["Value"]);
|
|
if ($max == 0) {
|
|
return false;
|
|
}
|
|
$r = DBA::fetchFirst("SHOW STATUS WHERE `variable_name` = 'Threads_connected'");
|
|
if (!DBA::isResult($r)) {
|
|
return false;
|
|
}
|
|
$used = intval($r["Value"]);
|
|
if ($used == 0) {
|
|
return false;
|
|
}
|
|
Logger::log("Connection usage (system values): ".$used."/".$max, Logger::DEBUG);
|
|
|
|
$level = $used / $max * 100;
|
|
|
|
if ($level < $maxlevel) {
|
|
return false;
|
|
}
|
|
Logger::log("Maximum level (".$level."%) of system connections reached: ".$used."/".$max);
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief fix the queue entry if the worker process died
|
|
* @return void
|
|
* @throws \Exception
|
|
*/
|
|
private static function killStaleWorkers()
|
|
{
|
|
$stamp = (float)microtime(true);
|
|
$entries = DBA::select(
|
|
'workerqueue',
|
|
['id', 'pid', 'executed', 'priority', 'parameter'],
|
|
['NOT `done` AND `pid` != 0'],
|
|
['order' => ['priority', 'created']]
|
|
);
|
|
self::$db_duration += (microtime(true) - $stamp);
|
|
|
|
while ($entry = DBA::fetch($entries)) {
|
|
if (!posix_kill($entry["pid"], 0)) {
|
|
$stamp = (float)microtime(true);
|
|
DBA::update(
|
|
'workerqueue',
|
|
['executed' => DBA::NULL_DATETIME, 'pid' => 0],
|
|
['id' => $entry["id"]]
|
|
);
|
|
self::$db_duration += (microtime(true) - $stamp);
|
|
self::$db_duration_write += (microtime(true) - $stamp);
|
|
} else {
|
|
// Kill long running processes
|
|
// Check if the priority is in a valid range
|
|
if (!in_array($entry["priority"], [PRIORITY_CRITICAL, PRIORITY_HIGH, PRIORITY_MEDIUM, PRIORITY_LOW, PRIORITY_NEGLIGIBLE])) {
|
|
$entry["priority"] = PRIORITY_MEDIUM;
|
|
}
|
|
|
|
// Define the maximum durations
|
|
$max_duration_defaults = [PRIORITY_CRITICAL => 720, PRIORITY_HIGH => 10, PRIORITY_MEDIUM => 60, PRIORITY_LOW => 180, PRIORITY_NEGLIGIBLE => 720];
|
|
$max_duration = $max_duration_defaults[$entry["priority"]];
|
|
|
|
$argv = json_decode($entry["parameter"], true);
|
|
$argv[0] = basename($argv[0]);
|
|
|
|
// How long is the process already running?
|
|
$duration = (time() - strtotime($entry["executed"])) / 60;
|
|
if ($duration > $max_duration) {
|
|
Logger::log("Worker process ".$entry["pid"]." (".substr(json_encode($argv), 0, 50).") took more than ".$max_duration." minutes. It will be killed now.");
|
|
posix_kill($entry["pid"], SIGTERM);
|
|
|
|
// We killed the stale process.
|
|
// To avoid a blocking situation we reschedule the process at the beginning of the queue.
|
|
// Additionally we are lowering the priority. (But not PRIORITY_CRITICAL)
|
|
$new_priority = $entry["priority"];
|
|
if ($entry["priority"] == PRIORITY_HIGH) {
|
|
$new_priority = PRIORITY_MEDIUM;
|
|
} elseif ($entry["priority"] == PRIORITY_MEDIUM) {
|
|
$new_priority = PRIORITY_LOW;
|
|
} elseif ($entry["priority"] != PRIORITY_CRITICAL) {
|
|
$new_priority = PRIORITY_NEGLIGIBLE;
|
|
}
|
|
$stamp = (float)microtime(true);
|
|
DBA::update(
|
|
'workerqueue',
|
|
['executed' => DBA::NULL_DATETIME, 'created' => DateTimeFormat::utcNow(), 'priority' => $new_priority, 'pid' => 0],
|
|
['id' => $entry["id"]]
|
|
);
|
|
self::$db_duration += (microtime(true) - $stamp);
|
|
self::$db_duration_write += (microtime(true) - $stamp);
|
|
} else {
|
|
Logger::log("Worker process ".$entry["pid"]." (".substr(json_encode($argv), 0, 50).") now runs for ".round($duration)." of ".$max_duration." allowed minutes. That's okay.", Logger::DEBUG);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Checks if the number of active workers exceeds the given limits
|
|
*
|
|
* @return bool Are there too much workers running?
|
|
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
|
|
*/
|
|
private static function tooMuchWorkers()
|
|
{
|
|
$queues = Config::get("system", "worker_queues", 10);
|
|
|
|
$maxqueues = $queues;
|
|
|
|
$active = self::activeWorkers();
|
|
|
|
// Decrease the number of workers at higher load
|
|
$load = System::currentLoad();
|
|
if ($load) {
|
|
$maxsysload = intval(Config::get("system", "maxloadavg", 20));
|
|
|
|
/* Default exponent 3 causes queues to rapidly decrease as load increases.
|
|
* If you have 20 max queues at idle, then you get only 5 queues at 37.1% of $maxsysload.
|
|
* For some environments, this rapid decrease is not needed.
|
|
* With exponent 1, you could have 20 max queues at idle and 13 at 37% of $maxsysload.
|
|
*/
|
|
$exponent = intval(Config::get('system', 'worker_load_exponent', 3));
|
|
$slope = pow(max(0, $maxsysload - $load) / $maxsysload, $exponent);
|
|
$queues = intval(ceil($slope * $maxqueues));
|
|
|
|
$processlist = '';
|
|
|
|
if (Config::get('system', 'worker_jpm')) {
|
|
$intervals = explode(',', Config::get('system', 'worker_jpm_range'));
|
|
$jobs_per_minute = [];
|
|
foreach ($intervals as $interval) {
|
|
if ($interval == 0) {
|
|
continue;
|
|
} else {
|
|
$interval = (int)$interval;
|
|
}
|
|
|
|
$stamp = (float)microtime(true);
|
|
$jobs = DBA::p("SELECT COUNT(*) AS `jobs` FROM `workerqueue` WHERE `done` AND `executed` > UTC_TIMESTAMP() - INTERVAL ? MINUTE", $interval);
|
|
self::$db_duration += (microtime(true) - $stamp);
|
|
self::$db_duration_stat += (microtime(true) - $stamp);
|
|
if ($job = DBA::fetch($jobs)) {
|
|
$jobs_per_minute[$interval] = number_format($job['jobs'] / $interval, 0);
|
|
}
|
|
DBA::close($jobs);
|
|
}
|
|
$processlist = ' - jpm: '.implode('/', $jobs_per_minute);
|
|
}
|
|
|
|
// Create a list of queue entries grouped by their priority
|
|
$listitem = [0 => ''];
|
|
|
|
$idle_workers = $active;
|
|
|
|
$deferred = self::deferredEntries();
|
|
|
|
if (Config::get('system', 'worker_debug')) {
|
|
$waiting_processes = 0;
|
|
// Now adding all processes with workerqueue entries
|
|
$stamp = (float)microtime(true);
|
|
$jobs = DBA::p("SELECT COUNT(*) AS `entries`, `priority` FROM `workerqueue` WHERE NOT `done` AND `next_try` < ? GROUP BY `priority`", DateTimeFormat::utcNow());
|
|
self::$db_duration += (microtime(true) - $stamp);
|
|
self::$db_duration_stat += (microtime(true) - $stamp);
|
|
while ($entry = DBA::fetch($jobs)) {
|
|
$stamp = (float)microtime(true);
|
|
$processes = DBA::p("SELECT COUNT(*) AS `running` FROM `process` INNER JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid` WHERE NOT `done` AND `priority` = ?", $entry["priority"]);
|
|
self::$db_duration += (microtime(true) - $stamp);
|
|
self::$db_duration_stat += (microtime(true) - $stamp);
|
|
if ($process = DBA::fetch($processes)) {
|
|
$idle_workers -= $process["running"];
|
|
$waiting_processes += $entry["entries"];
|
|
$listitem[$entry["priority"]] = $entry["priority"].":".$process["running"]."/".$entry["entries"];
|
|
}
|
|
DBA::close($processes);
|
|
}
|
|
DBA::close($jobs);
|
|
$entries = $deferred + $waiting_processes;
|
|
} else {
|
|
$entries = self::totalEntries();
|
|
$waiting_processes = max(0, $entries - $deferred);
|
|
$stamp = (float)microtime(true);
|
|
$jobs = DBA::p("SELECT COUNT(*) AS `running`, `priority` FROM `process` INNER JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid` AND NOT `done` GROUP BY `priority` ORDER BY `priority`");
|
|
self::$db_duration += (microtime(true) - $stamp);
|
|
self::$db_duration_stat += (microtime(true) - $stamp);
|
|
|
|
while ($entry = DBA::fetch($jobs)) {
|
|
$idle_workers -= $entry["running"];
|
|
$listitem[$entry["priority"]] = $entry["priority"].":".$entry["running"];
|
|
}
|
|
DBA::close($jobs);
|
|
}
|
|
|
|
$listitem[0] = "0:" . max(0, $idle_workers);
|
|
|
|
$processlist .= ' ('.implode(', ', $listitem).')';
|
|
|
|
if (Config::get("system", "worker_fastlane", false) && ($queues > 0) && ($active >= $queues) && self::entriesExists()) {
|
|
$top_priority = self::highestPriority();
|
|
$high_running = self::processWithPriorityActive($top_priority);
|
|
|
|
if (!$high_running && ($top_priority > PRIORITY_UNDEFINED) && ($top_priority < PRIORITY_NEGLIGIBLE)) {
|
|
Logger::log("There are jobs with priority ".$top_priority." waiting but none is executed. Open a fastlane.", Logger::DEBUG);
|
|
$queues = $active + 1;
|
|
}
|
|
}
|
|
|
|
Logger::log("Load: " . $load ."/" . $maxsysload . " - processes: " . $deferred . "/" . $active . "/" . $waiting_processes . $processlist . " - maximum: " . $queues . "/" . $maxqueues, Logger::DEBUG);
|
|
|
|
// Are there fewer workers running as possible? Then fork a new one.
|
|
if (!Config::get("system", "worker_dont_fork", false) && ($queues > ($active + 1)) && self::entriesExists()) {
|
|
Logger::log("Active workers: ".$active."/".$queues." Fork a new worker.", Logger::DEBUG);
|
|
if (Config::get('system', 'worker_daemon_mode', false)) {
|
|
self::IPCSetJobState(true);
|
|
} else {
|
|
self::spawnWorker();
|
|
}
|
|
}
|
|
}
|
|
|
|
// if there are too much worker, we don't spawn a new one.
|
|
if (Config::get('system', 'worker_daemon_mode', false) && ($active > $queues)) {
|
|
self::IPCSetJobState(false);
|
|
}
|
|
|
|
return $active > $queues;
|
|
}
|
|
|
|
/**
|
|
* @brief Returns the number of active worker processes
|
|
*
|
|
* @return integer Number of active worker processes
|
|
* @throws \Exception
|
|
*/
|
|
private static function activeWorkers()
|
|
{
|
|
$stamp = (float)microtime(true);
|
|
$count = DBA::count('process', ['command' => 'Worker.php']);
|
|
self::$db_duration += (microtime(true) - $stamp);
|
|
return $count;
|
|
}
|
|
|
|
/**
|
|
* @brief Returns waiting jobs for the current process id
|
|
*
|
|
* @return array waiting workerqueue jobs
|
|
* @throws \Exception
|
|
*/
|
|
private static function getWaitingJobForPID()
|
|
{
|
|
$stamp = (float)microtime(true);
|
|
$r = DBA::select('workerqueue', [], ['pid' => getmypid(), 'done' => false]);
|
|
self::$db_duration += (microtime(true) - $stamp);
|
|
if (DBA::isResult($r)) {
|
|
return DBA::toArray($r);
|
|
}
|
|
DBA::close($r);
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @brief Returns the next jobs that should be executed
|
|
*
|
|
* @return array array with next jobs
|
|
* @throws \Exception
|
|
*/
|
|
private static function nextProcess()
|
|
{
|
|
$priority = self::nextPriority();
|
|
if (empty($priority)) {
|
|
Logger::info('No tasks found');
|
|
return [];
|
|
}
|
|
|
|
if ($priority <= PRIORITY_MEDIUM) {
|
|
$limit = Config::get('system', 'worker_fetch_limit', 1);
|
|
} else {
|
|
$limit = 1;
|
|
}
|
|
|
|
$ids = [];
|
|
$stamp = (float)microtime(true);
|
|
$condition = ["`priority` = ? AND `pid` = 0 AND NOT `done` AND `next_try` < ?", $priority, DateTimeFormat::utcNow()];
|
|
$tasks = DBA::select('workerqueue', ['id'], $condition, ['limit' => $limit, 'order' => ['created']]);
|
|
self::$db_duration += (microtime(true) - $stamp);
|
|
while ($task = DBA::fetch($tasks)) {
|
|
$ids[] = $task['id'];
|
|
}
|
|
DBA::close($tasks);
|
|
|
|
Logger::info('Found:', ['id' => $ids, 'priority' => $priority]);
|
|
return $ids;
|
|
}
|
|
|
|
/**
|
|
* @brief Returns the priority of the next workerqueue job
|
|
*
|
|
* @return string priority
|
|
* @throws \Exception
|
|
*/
|
|
private static function nextPriority()
|
|
{
|
|
$waiting = [];
|
|
$priorities = [PRIORITY_CRITICAL, PRIORITY_HIGH, PRIORITY_MEDIUM, PRIORITY_LOW, PRIORITY_NEGLIGIBLE];
|
|
foreach ($priorities as $priority) {
|
|
$stamp = (float)microtime(true);
|
|
if (DBA::exists('workerqueue', ["`priority` = ? AND `pid` = 0 AND NOT `done` AND `next_try` < ?", $priority, DateTimeFormat::utcNow()])) {
|
|
$waiting[$priority] = true;
|
|
}
|
|
self::$db_duration += (microtime(true) - $stamp);
|
|
}
|
|
|
|
if (!empty($waiting[PRIORITY_CRITICAL])) {
|
|
return PRIORITY_CRITICAL;
|
|
}
|
|
|
|
$running = [];
|
|
$running_total = 0;
|
|
$stamp = (float)microtime(true);
|
|
$processes = DBA::p("SELECT COUNT(DISTINCT(`process`.`pid`)) AS `running`, `priority` FROM `process`
|
|
INNER JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid`
|
|
WHERE NOT `done` GROUP BY `priority`");
|
|
self::$db_duration += (microtime(true) - $stamp);
|
|
while ($process = DBA::fetch($processes)) {
|
|
$running[$process['priority']] = $process['running'];
|
|
$running_total += $process['running'];
|
|
}
|
|
DBA::close($processes);
|
|
|
|
foreach ($priorities as $priority) {
|
|
if (!empty($waiting[$priority]) && empty($running[$priority])) {
|
|
Logger::info('No running worker found with priority {priority} - assigning it.', ['priority' => $priority]);
|
|
return $priority;
|
|
}
|
|
}
|
|
|
|
$active = max(self::activeWorkers(), $running_total);
|
|
$priorities = max(count($waiting), count($running));
|
|
$exponent = 2;
|
|
|
|
$total = 0;
|
|
for ($i = 1; $i <= $priorities; ++$i) {
|
|
$total += pow($i, $exponent);
|
|
}
|
|
|
|
$limit = [];
|
|
for ($i = 1; $i <= $priorities; ++$i) {
|
|
$limit[$priorities - $i] = max(1, round($active * (pow($i, $exponent) / $total)));
|
|
}
|
|
|
|
$i = 0;
|
|
foreach ($running as $priority => $workers) {
|
|
if ($workers < $limit[$i++]) {
|
|
Logger::info('Priority {priority} has got {workers} workers out of a limit of {limit}', ['priority' => $priority, 'workers' => $workers, 'limit' => $limit[$i - 1]]);
|
|
return $priority;
|
|
}
|
|
}
|
|
|
|
if (!empty($waiting)) {
|
|
$priority = array_keys($waiting)[0];
|
|
Logger::info('No underassigned priority found, now taking the highest priority.', ['priority' => $priority]);
|
|
return $priority;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @brief Find and claim the next worker process for us
|
|
*
|
|
* @return boolean Have we found something?
|
|
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
|
|
*/
|
|
private static function findWorkerProcesses()
|
|
{
|
|
$mypid = getmypid();
|
|
|
|
$ids = self::nextProcess();
|
|
|
|
// If there is no result we check without priority limit
|
|
if (empty($ids)) {
|
|
$stamp = (float)microtime(true);
|
|
$condition = ["`pid` = 0 AND NOT `done` AND `next_try` < ?", DateTimeFormat::utcNow()];
|
|
$result = DBA::select('workerqueue', ['id'], $condition, ['limit' => 1, 'order' => ['priority', 'created']]);
|
|
self::$db_duration += (microtime(true) - $stamp);
|
|
|
|
while ($id = DBA::fetch($result)) {
|
|
$ids[] = $id["id"];
|
|
}
|
|
DBA::close($result);
|
|
}
|
|
|
|
if (!empty($ids)) {
|
|
$stamp = (float)microtime(true);
|
|
$condition = ['id' => $ids, 'done' => false, 'pid' => 0];
|
|
DBA::update('workerqueue', ['executed' => DateTimeFormat::utcNow(), 'pid' => $mypid], $condition);
|
|
self::$db_duration += (microtime(true) - $stamp);
|
|
self::$db_duration_write += (microtime(true) - $stamp);
|
|
}
|
|
|
|
return !empty($ids);
|
|
}
|
|
|
|
/**
|
|
* @brief Returns the next worker process
|
|
*
|
|
* @return string SQL statement
|
|
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
|
|
*/
|
|
public static function workerProcess()
|
|
{
|
|
// There can already be jobs for us in the queue.
|
|
$waiting = self::getWaitingJobForPID();
|
|
if (!empty($waiting)) {
|
|
return $waiting;
|
|
}
|
|
|
|
$stamp = (float)microtime(true);
|
|
if (!Lock::acquire('worker_process')) {
|
|
return false;
|
|
}
|
|
self::$lock_duration += (microtime(true) - $stamp);
|
|
|
|
$found = self::findWorkerProcesses();
|
|
|
|
Lock::release('worker_process');
|
|
|
|
if ($found) {
|
|
$stamp = (float)microtime(true);
|
|
$r = DBA::select('workerqueue', [], ['pid' => getmypid(), 'done' => false]);
|
|
self::$db_duration += (microtime(true) - $stamp);
|
|
return DBA::toArray($r);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @brief Removes a workerqueue entry from the current process
|
|
* @return void
|
|
* @throws \Exception
|
|
*/
|
|
public static function unclaimProcess()
|
|
{
|
|
$mypid = getmypid();
|
|
|
|
$stamp = (float)microtime(true);
|
|
DBA::update('workerqueue', ['executed' => DBA::NULL_DATETIME, 'pid' => 0], ['pid' => $mypid, 'done' => false]);
|
|
self::$db_duration += (microtime(true) - $stamp);
|
|
self::$db_duration_write += (microtime(true) - $stamp);
|
|
}
|
|
|
|
/**
|
|
* @brief Call the front end worker
|
|
* @return void
|
|
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
|
|
*/
|
|
public static function callWorker()
|
|
{
|
|
if (!Config::get("system", "frontend_worker")) {
|
|
return;
|
|
}
|
|
|
|
$url = System::baseUrl()."/worker";
|
|
Network::fetchUrl($url, false, $redirects, 1);
|
|
}
|
|
|
|
/**
|
|
* @brief Call the front end worker if there aren't any active
|
|
* @return void
|
|
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
|
|
*/
|
|
public static function executeIfIdle()
|
|
{
|
|
if (!Config::get("system", "frontend_worker")) {
|
|
return;
|
|
}
|
|
|
|
// Do we have "proc_open"? Then we can fork the worker
|
|
if (function_exists("proc_open")) {
|
|
// When was the last time that we called the worker?
|
|
// Less than one minute? Then we quit
|
|
if ((time() - Config::get("system", "worker_started")) < 60) {
|
|
return;
|
|
}
|
|
|
|
Config::set("system", "worker_started", time());
|
|
|
|
// Do we have enough running workers? Then we quit here.
|
|
if (self::tooMuchWorkers()) {
|
|
// Cleaning dead processes
|
|
self::killStaleWorkers();
|
|
Process::deleteInactive();
|
|
|
|
return;
|
|
}
|
|
|
|
self::runCron();
|
|
|
|
Logger::log('Call worker', Logger::DEBUG);
|
|
self::spawnWorker();
|
|
return;
|
|
}
|
|
|
|
// We cannot execute background processes.
|
|
// We now run the processes from the frontend.
|
|
// This won't work with long running processes.
|
|
self::runCron();
|
|
|
|
self::clearProcesses();
|
|
|
|
$workers = self::activeWorkers();
|
|
|
|
if ($workers == 0) {
|
|
self::callWorker();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Removes long running worker processes
|
|
* @return void
|
|
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
|
|
*/
|
|
public static function clearProcesses()
|
|
{
|
|
$timeout = Config::get("system", "frontend_worker_timeout", 10);
|
|
|
|
/// @todo We should clean up the corresponding workerqueue entries as well
|
|
$stamp = (float)microtime(true);
|
|
$condition = ["`created` < ? AND `command` = 'worker.php'",
|
|
DateTimeFormat::utc("now - ".$timeout." minutes")];
|
|
DBA::delete('process', $condition);
|
|
self::$db_duration = (microtime(true) - $stamp);
|
|
self::$db_duration_write += (microtime(true) - $stamp);
|
|
}
|
|
|
|
/**
|
|
* @brief Runs the cron processes
|
|
* @return void
|
|
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
|
|
*/
|
|
private static function runCron()
|
|
{
|
|
Logger::log('Add cron entries', Logger::DEBUG);
|
|
|
|
// Check for spooled items
|
|
self::add(['priority' => PRIORITY_HIGH, 'force_priority' => true], 'SpoolPost');
|
|
|
|
// Run the cron job that calls all other jobs
|
|
self::add(['priority' => PRIORITY_MEDIUM, 'force_priority' => true], 'Cron');
|
|
|
|
// Cleaning dead processes
|
|
self::killStaleWorkers();
|
|
}
|
|
|
|
/**
|
|
* @brief Spawns a new worker
|
|
* @param bool $do_cron
|
|
* @return void
|
|
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
|
|
*/
|
|
public static function spawnWorker($do_cron = false)
|
|
{
|
|
$command = 'bin/worker.php';
|
|
|
|
$args = ['no_cron' => !$do_cron];
|
|
|
|
get_app()->proc_run($command, $args);
|
|
|
|
// after spawning we have to remove the flag.
|
|
if (Config::get('system', 'worker_daemon_mode', false)) {
|
|
self::IPCSetJobState(false);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Adds tasks to the worker queue
|
|
*
|
|
* @param (integer|array) priority or parameter array, strings are deprecated and are ignored
|
|
*
|
|
* next args are passed as $cmd command line
|
|
* or: Worker::add(PRIORITY_HIGH, "Notifier", "drop", $drop_id);
|
|
* or: Worker::add(array('priority' => PRIORITY_HIGH, 'dont_fork' => true), "CreateShadowEntry", $post_id);
|
|
*
|
|
* @return boolean "false" if proc_run couldn't be executed
|
|
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
|
|
* @note $cmd and string args are surrounded with ""
|
|
*
|
|
* @hooks 'proc_run'
|
|
* array $arr
|
|
*
|
|
*/
|
|
public static function add($cmd)
|
|
{
|
|
$args = func_get_args();
|
|
|
|
if (!count($args)) {
|
|
return false;
|
|
}
|
|
|
|
$arr = ['args' => $args, 'run_cmd' => true];
|
|
|
|
Hook::callAll("proc_run", $arr);
|
|
if (!$arr['run_cmd'] || !count($args)) {
|
|
return true;
|
|
}
|
|
|
|
$priority = PRIORITY_MEDIUM;
|
|
$dont_fork = Config::get("system", "worker_dont_fork", false);
|
|
$created = DateTimeFormat::utcNow();
|
|
$force_priority = false;
|
|
|
|
$run_parameter = array_shift($args);
|
|
|
|
if (is_int($run_parameter)) {
|
|
$priority = $run_parameter;
|
|
} elseif (is_array($run_parameter)) {
|
|
if (isset($run_parameter['priority'])) {
|
|
$priority = $run_parameter['priority'];
|
|
}
|
|
if (isset($run_parameter['created'])) {
|
|
$created = $run_parameter['created'];
|
|
}
|
|
if (isset($run_parameter['dont_fork'])) {
|
|
$dont_fork = $run_parameter['dont_fork'];
|
|
}
|
|
if (isset($run_parameter['force_priority'])) {
|
|
$force_priority = $run_parameter['force_priority'];
|
|
}
|
|
}
|
|
|
|
$parameters = json_encode($args);
|
|
$found = DBA::exists('workerqueue', ['parameter' => $parameters, 'done' => false]);
|
|
|
|
// Quit if there was a database error - a precaution for the update process to 3.5.3
|
|
if (DBA::errorNo() != 0) {
|
|
return false;
|
|
}
|
|
|
|
if (!$found) {
|
|
DBA::insert('workerqueue', ['parameter' => $parameters, 'created' => $created, 'priority' => $priority]);
|
|
} elseif ($force_priority) {
|
|
DBA::update('workerqueue', ['priority' => $priority], ['parameter' => $parameters, 'done' => false, 'pid' => 0]);
|
|
}
|
|
|
|
// Should we quit and wait for the worker to be called as a cronjob?
|
|
if ($dont_fork) {
|
|
return true;
|
|
}
|
|
|
|
// If there is a lock then we don't have to check for too much worker
|
|
if (!Lock::acquire('worker', 0)) {
|
|
return true;
|
|
}
|
|
|
|
// If there are already enough workers running, don't fork another one
|
|
$quit = self::tooMuchWorkers();
|
|
Lock::release('worker');
|
|
|
|
if ($quit) {
|
|
return true;
|
|
}
|
|
|
|
// We tell the daemon that a new job entry exists
|
|
if (Config::get('system', 'worker_daemon_mode', false)) {
|
|
// We don't have to set the IPC flag - this is done in "tooMuchWorkers"
|
|
return true;
|
|
}
|
|
|
|
// Now call the worker to execute the jobs that we just added to the queue
|
|
self::spawnWorker();
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Defers the current worker entry
|
|
*/
|
|
public static function defer()
|
|
{
|
|
if (empty(BaseObject::getApp()->queue)) {
|
|
return;
|
|
}
|
|
|
|
$queue = BaseObject::getApp()->queue;
|
|
|
|
$retrial = $queue['retrial'];
|
|
$id = $queue['id'];
|
|
$priority = $queue['priority'];
|
|
|
|
if ($retrial > 14) {
|
|
Logger::log('Id ' . $id . ' had been tried 14 times. We stop now.', Logger::DEBUG);
|
|
return;
|
|
}
|
|
|
|
// Calculate the delay until the next trial
|
|
$delay = (($retrial + 3) ** 4) + (rand(1, 30) * ($retrial + 1));
|
|
$next = DateTimeFormat::utc('now + ' . $delay . ' seconds');
|
|
|
|
if (($priority < PRIORITY_MEDIUM) && ($retrial > 2)) {
|
|
$priority = PRIORITY_MEDIUM;
|
|
} elseif (($priority < PRIORITY_LOW) && ($retrial > 5)) {
|
|
$priority = PRIORITY_LOW;
|
|
} elseif (($priority < PRIORITY_NEGLIGIBLE) && ($retrial > 7)) {
|
|
$priority = PRIORITY_NEGLIGIBLE;
|
|
}
|
|
|
|
Logger::log('Defer execution ' . $retrial . ' of id ' . $id . ' to ' . $next . ' - priority old/new: ' . $queue['priority'] . '/' . $priority, Logger::DEBUG);
|
|
|
|
$stamp = (float)microtime(true);
|
|
$fields = ['retrial' => $retrial + 1, 'next_try' => $next, 'executed' => DBA::NULL_DATETIME, 'pid' => 0, 'priority' => $priority];
|
|
DBA::update('workerqueue', $fields, ['id' => $id]);
|
|
self::$db_duration += (microtime(true) - $stamp);
|
|
self::$db_duration_write += (microtime(true) - $stamp);
|
|
}
|
|
|
|
/**
|
|
* Log active processes into the "process" table
|
|
*
|
|
* @brief Log active processes into the "process" table
|
|
*/
|
|
public static function startProcess()
|
|
{
|
|
$trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 1);
|
|
|
|
$command = basename($trace[0]['file']);
|
|
|
|
Process::deleteInactive();
|
|
|
|
Process::insert($command);
|
|
}
|
|
|
|
/**
|
|
* Remove the active process from the "process" table
|
|
*
|
|
* @brief Remove the active process from the "process" table
|
|
* @return bool
|
|
* @throws \Exception
|
|
*/
|
|
public static function endProcess()
|
|
{
|
|
return Process::deleteByPid();
|
|
}
|
|
|
|
/**
|
|
* Set the flag if some job is waiting
|
|
*
|
|
* @brief Set the flag if some job is waiting
|
|
* @param boolean $jobs Is there a waiting job?
|
|
* @throws \Exception
|
|
*/
|
|
public static function IPCSetJobState($jobs)
|
|
{
|
|
$stamp = (float)microtime(true);
|
|
DBA::update('worker-ipc', ['jobs' => $jobs], ['key' => 1], true);
|
|
self::$db_duration += (microtime(true) - $stamp);
|
|
self::$db_duration_write += (microtime(true) - $stamp);
|
|
}
|
|
|
|
/**
|
|
* Checks if some worker job waits to be executed
|
|
*
|
|
* @brief Checks if some worker job waits to be executed
|
|
* @return bool
|
|
* @throws \Exception
|
|
*/
|
|
public static function IPCJobsExists()
|
|
{
|
|
$stamp = (float)microtime(true);
|
|
$row = DBA::selectFirst('worker-ipc', ['jobs'], ['key' => 1]);
|
|
self::$db_duration += (microtime(true) - $stamp);
|
|
|
|
// When we don't have a row, no job is running
|
|
if (!DBA::isResult($row)) {
|
|
return false;
|
|
}
|
|
|
|
return (bool)$row['jobs'];
|
|
}
|
|
}
|