mirror of https://github.com/friendica/friendica
Merge pull request #6719 from annando/worker-scheduler
New scheduler mechanism - now to the correct branch
This commit is contained in:
GitHub
commit
4375edd63e
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@ -34,7 +34,7 @@
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use Friendica\Database\DBA;
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if (!defined('DB_UPDATE_VERSION')) {
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define('DB_UPDATE_VERSION', 1302);
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define('DB_UPDATE_VERSION', 1303);
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}
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return [
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@ -1378,9 +1378,8 @@ return [
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"PRIMARY" => ["id"],
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"done_parameter" => ["done", "parameter(64)"],
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"done_executed" => ["done", "executed"],
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"done_priority" => ["done", "priority"],
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"done_priority_created" => ["done", "priority", "created"],
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"done_pid" => ["done", "pid"],
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"done_priority_next_try" => ["done", "priority", "next_try"],
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"done_pid_next_try" => ["done", "pid", "next_try"],
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"done_pid_priority_created" => ["done", "pid", "priority", "created"]
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]
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@ -41,11 +41,7 @@ function worker_init()
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Worker::callWorker();
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$passing_slow = false;
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$entries = 0;
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$deferred = 0;
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if ($r = Worker::workerProcess($passing_slow, $entries, $deferred)) {
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if ($r = Worker::workerProcess()) {
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// On most configurations this parameter wouldn't have any effect.
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// But since it doesn't destroy anything, we just try to get more execution time in any way.
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set_time_limit(0);
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@ -92,15 +92,8 @@ class Worker
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$starttime = time();
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$entries = 0;
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$deferred = 0;
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// We fetch the next queue entry that is about to be executed
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while ($r = self::workerProcess($passing_slow, $entries, $deferred)) {
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// When we are processing jobs with a lower priority, we don't refetch new jobs
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// Otherwise fast jobs could wait behind slow ones and could be blocked.
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$refetched = $passing_slow;
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while ($r = self::workerProcess()) {
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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)$entry['priority'];
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@ -112,20 +105,16 @@ class Worker
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}
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// If possible we will fetch new jobs for this worker
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if (!$refetched) {
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$entries = self::totalEntries();
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$deferred = self::deferredEntries();
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if (Lock::acquire('worker_process', 0)) {
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$refetched = self::findWorkerProcesses($passing_slow, $entries, $deferred);
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Lock::release('worker_process');
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}
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if (!self::getWaitingJobForPID() && Lock::acquire('worker_process', 0)) {
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self::findWorkerProcesses();
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Lock::release('worker_process');
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}
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}
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// To avoid the quitting of multiple workers only one worker at a time will execute the check
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if (Lock::acquire('worker', 0)) {
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// Count active workers and compare them with a maximum value that depends on the load
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if (self::tooMuchWorkers($entries, $deferred)) {
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if (self::tooMuchWorkers()) {
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Logger::log('Active worker limit reached, quitting.', Logger::DEBUG);
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Lock::release('worker');
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return;
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@ -409,16 +398,15 @@ class Worker
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* The execution time is the productive time.
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* By changing parameters like the maximum number of workers we can check the effectivness.
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*/
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Logger::log(
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'DB: '.number_format(self::$db_duration - (self::$db_duration_count + self::$db_duration_write + self::$db_duration_stat), 4).
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' - DB-Count: '.number_format(self::$db_duration_count, 4).
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' - DB-Stat: '.number_format(self::$db_duration_stat, 4).
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' - DB-Write: '.number_format(self::$db_duration_write, 4).
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' - Lock: '.number_format(self::$lock_duration, 4).
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' - Rest: '.number_format(max(0, $up_duration - (self::$db_duration + self::$lock_duration)), 4).
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' - Execution: '.number_format($duration, 4),
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Logger::DEBUG
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);
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$dbtotal = number_format(self::$db_duration - (self::$db_duration_count + self::$db_duration_write + self::$db_duration_stat), 4);
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$dbcount = number_format(self::$db_duration_count, 4);
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$dbstat = number_format(self::$db_duration_stat, 4);
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$dbwrite = number_format(self::$db_duration_write, 4);
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$dblock = number_format(self::$lock_duration, 4);
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$rest = number_format(max(0, $up_duration - (self::$db_duration + self::$lock_duration)), 4);
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$exec = number_format($duration, 4);
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Logger::info('Performance:', ['total' => $dbtotal, 'count' => $dbcount, 'stat' => $dbstat, 'write' => $dbwrite, 'block' => $dblock, '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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@ -607,13 +595,10 @@ class Worker
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/**
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* @brief Checks if the number of active workers exceeds the given limits
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*
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* @param integer $entries Total number of queue entries
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* @param integer $deferred Number of deferred queue entries
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*
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* @return bool Are there too much workers running?
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public static function tooMuchWorkers($entries = 0, $deferred = 0)
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private static function tooMuchWorkers()
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{
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$queues = Config::get("system", "worker_queues", 4);
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@ -664,12 +649,7 @@ class Worker
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$idle_workers = $active;
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if (empty($deferred) && empty($entries)) {
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$deferred = self::deferredEntries();
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$entries = max(self::totalEntries() - $deferred, 0);
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}
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$waiting_processes = max(0, $entries - $deferred);
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$deferred = self::deferredEntries();
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if (Config::get('system', 'worker_debug')) {
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$waiting_processes = 0;
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@ -691,10 +671,14 @@ class Worker
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DBA::close($processes);
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}
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DBA::close($jobs);
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$entries = $deferred + $waiting_processes;
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} else {
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$entries = self::totalEntries();
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$waiting_processes = max(0, $entries - $deferred);
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$stamp = (float)microtime(true);
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$jobs = DBA::p("SELECT COUNT(*) AS `running`, `priority` FROM `process` INNER JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid` AND NOT `done` GROUP BY `priority` ORDER BY `priority`");
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self::$db_duration += (microtime(true) - $stamp);
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self::$db_duration_stat += (microtime(true) - $stamp);
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while ($entry = DBA::fetch($jobs)) {
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$idle_workers -= $entry["running"];
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@ -753,201 +737,13 @@ class Worker
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}
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/**
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* @brief Check if we should pass some slow processes
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* @brief Returns waiting jobs for the current process id
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*
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* When the active processes of the highest priority are using more than 2/3
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* of all processes, we let pass slower processes.
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*
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* @param string $highest_priority Returns the currently highest priority
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* @return bool We let pass a slower process than $highest_priority
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* @return array waiting workerqueue jobs
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* @throws \Exception
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*/
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private static function passingSlow(&$highest_priority)
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private static function getWaitingJobForPID()
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{
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$highest_priority = 0;
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$stamp = (float)microtime(true);
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$r = DBA::p(
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"SELECT `priority`
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FROM `process`
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INNER JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid` AND NOT `done`"
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);
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self::$db_duration += (microtime(true) - $stamp);
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// No active processes at all? Fine
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if (!DBA::isResult($r)) {
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return false;
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}
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$priorities = [];
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while ($line = DBA::fetch($r)) {
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$priorities[] = $line["priority"];
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}
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DBA::close($r);
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// Should not happen
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if (count($priorities) == 0) {
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return false;
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}
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$highest_priority = min($priorities);
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// The highest process is already the slowest one?
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// Then we quit
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if ($highest_priority == PRIORITY_NEGLIGIBLE) {
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return false;
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}
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$high = 0;
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foreach ($priorities as $priority) {
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if ($priority == $highest_priority) {
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++$high;
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}
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}
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Logger::log("Highest priority: ".$highest_priority." Total processes: ".count($priorities)." Count high priority processes: ".$high, Logger::DEBUG);
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$passing_slow = (($high/count($priorities)) > (2/3));
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if ($passing_slow) {
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Logger::log("Passing slower processes than priority ".$highest_priority, Logger::DEBUG);
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}
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return $passing_slow;
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}
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/**
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* @brief Find and claim the next worker process for us
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*
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* @param boolean $passing_slow Returns if we had passed low priority processes
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* @param integer $entries Total number of queue entries
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* @param integer $deferred Number of deferred queue entries
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* @return boolean Have we found something?
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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private static function findWorkerProcesses(&$passing_slow, $entries, $deferred)
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{
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$mypid = getmypid();
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// Check if we should pass some low priority process
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$highest_priority = 0;
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$found = false;
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$passing_slow = false;
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// The higher the number of parallel workers, the more we prefetch to prevent concurring access
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// We decrease the limit with the number of entries left in the queue
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$worker_queues = Config::get("system", "worker_queues", 4);
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$queue_length = Config::get('system', 'worker_fetch_limit', 1);
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$lower_job_limit = $worker_queues * $queue_length * 2;
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$entries = max($entries - $deferred, 0);
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// Now do some magic
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$exponent = 2;
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$slope = $queue_length / pow($lower_job_limit, $exponent);
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$limit = min($queue_length, ceil($slope * pow($entries, $exponent)));
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Logger::log('Deferred: ' . $deferred . ' - Total: ' . $entries . ' - Maximum: ' . $queue_length . ' - jobs per queue: ' . $limit, Logger::DEBUG);
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$ids = [];
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if (self::passingSlow($highest_priority)) {
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// Are there waiting processes with a higher priority than the currently highest?
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$stamp = (float)microtime(true);
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$result = DBA::select(
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'workerqueue',
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['id'],
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["`pid` = 0 AND `priority` < ? AND NOT `done` AND `next_try` < ?",
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$highest_priority, DateTimeFormat::utcNow()],
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['limit' => 1, 'order' => ['priority', 'created']]
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);
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self::$db_duration += (microtime(true) - $stamp);
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while ($id = DBA::fetch($result)) {
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$ids[] = $id["id"];
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}
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DBA::close($result);
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$found = (count($ids) > 0);
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if (!$found) {
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// Give slower processes some processing time
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$stamp = (float)microtime(true);
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$result = DBA::select(
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'workerqueue',
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['id'],
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["`pid` = 0 AND `priority` > ? AND NOT `done` AND `next_try` < ?",
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$highest_priority, DateTimeFormat::utcNow()],
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['limit' => 1, 'order' => ['priority', 'created']]
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);
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self::$db_duration += (microtime(true) - $stamp);
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while ($id = DBA::fetch($result)) {
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$ids[] = $id["id"];
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}
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DBA::close($result);
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$found = (count($ids) > 0);
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$passing_slow = $found;
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}
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}
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// At first try to fetch a bunch of high or medium tasks
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if (!$found && ($limit > 1)) {
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$stamp = (float)microtime(true);
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$result = DBA::select(
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'workerqueue',
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['id'],
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["`pid` = 0 AND NOT `done` AND `priority` <= ? AND `next_try` < ? AND `retrial` = 0",
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PRIORITY_MEDIUM, DateTimeFormat::utcNow()],
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['limit' => $limit, 'order' => ['created']]
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);
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self::$db_duration += (microtime(true) - $stamp);
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while ($id = DBA::fetch($result)) {
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$ids[] = $id["id"];
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}
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DBA::close($result);
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$found = (count($ids) > 0);
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}
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// If there is no result (or we shouldn't pass lower processes) we check without priority limit
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if (!$found) {
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$stamp = (float)microtime(true);
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$result = DBA::select(
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'workerqueue',
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['id'],
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["`pid` = 0 AND NOT `done` AND `next_try` < ?",
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DateTimeFormat::utcNow()],
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['limit' => 1, 'order' => ['priority', 'created']]
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);
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self::$db_duration += (microtime(true) - $stamp);
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while ($id = DBA::fetch($result)) {
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$ids[] = $id["id"];
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}
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DBA::close($result);
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$found = (count($ids) > 0);
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}
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if ($found) {
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$stamp = (float)microtime(true);
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$condition = "`id` IN (".substr(str_repeat("?, ", count($ids)), 0, -2).") AND `pid` = 0 AND NOT `done`";
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array_unshift($ids, $condition);
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DBA::update('workerqueue', ['executed' => DateTimeFormat::utcNow(), 'pid' => $mypid], $ids);
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self::$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 $found;
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}
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/**
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* @brief Returns the next worker process
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*
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* @param boolean $passing_slow Returns if we had passed low priority processes
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* @param integer $entries Returns total number of queue entries
|
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* @param integer $deferred Returns number of deferred queue entries
|
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*
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* @return string SQL statement
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public static function workerProcess(&$passing_slow, &$entries, &$deferred)
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{
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// There can already be jobs for us in the queue.
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$stamp = (float)microtime(true);
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$r = DBA::select('workerqueue', [], ['pid' => getmypid(), 'done' => false]);
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self::$db_duration += (microtime(true) - $stamp);
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@ -956,9 +752,165 @@ class Worker
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}
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DBA::close($r);
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// Counting the rows outside the lock reduces the lock time
|
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$entries = self::totalEntries();
|
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$deferred = self::deferredEntries();
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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)) {
|
||||
$priority = array_shift(array_keys($waiting));
|
||||
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;
|
||||
}
|
||||
|
||||
$stamp = (float)microtime(true);
|
||||
if (!Lock::acquire('worker_process')) {
|
||||
|
|
@ -966,7 +918,7 @@ class Worker
|
|||
}
|
||||
self::$lock_duration += (microtime(true) - $stamp);
|
||||
|
||||
$found = self::findWorkerProcesses($passing_slow, $entries, $deferred);
|
||||
$found = self::findWorkerProcesses();
|
||||
|
||||
Lock::release('worker_process');
|
||||
|
||||
|
|
|
|||
|
|
@ -616,7 +616,7 @@ class Contact extends BaseObject
|
|||
DBA::update('contact', ['archive' => true, 'network' => Protocol::PHANTOM, 'deleted' => true], ['id' => $id]);
|
||||
|
||||
// Delete it in the background
|
||||
Worker::add(PRIORITY_LOW, 'RemoveContact', $id);
|
||||
Worker::add(PRIORITY_MEDIUM, 'RemoveContact', $id);
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
|
|||
Loading…
Reference in New Issue