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Code cleanup

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This commit is contained in:
Michael 2019-02-17 18:55:17 +00:00
parent 01d6ba85ff
commit 061d959e7f
2 changed files with 38 additions and 63 deletions
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6
mod/worker.php
View file

@ -41,11 +41,7 @@ function worker_init()
Worker::callWorker(); Worker::callWorker();
$passing_slow = false; if ($r = Worker::workerProcess()) {
$entries = 0;
$deferred = 0;
if ($r = Worker::workerProcess($passing_slow, $entries, $deferred)) {
// On most configurations this parameter wouldn't have any effect. // On most configurations this parameter wouldn't have any effect.
// But since it doesn't destroy anything, we just try to get more execution time in any way. // But since it doesn't destroy anything, we just try to get more execution time in any way.
set_time_limit(0); set_time_limit(0);

95
src/Core/Worker.php
View file

@ -92,15 +92,8 @@ class Worker
$starttime = time(); $starttime = time();
$entries = 0;
$deferred = 0;
// We fetch the next queue entry that is about to be executed // We fetch the next queue entry that is about to be executed
while ($r = self::workerProcess($passing_slow, $entries, $deferred)) { while ($r = self::workerProcess()) {
// When we are processing jobs with a lower priority, we don't refetch new jobs
// Otherwise fast jobs could wait behind slow ones and could be blocked.
$refetched = $passing_slow;
foreach ($r as $entry) { foreach ($r as $entry) {
// Assure that the priority is an integer value // Assure that the priority is an integer value
$entry['priority'] = (int)$entry['priority']; $entry['priority'] = (int)$entry['priority'];
@ -112,20 +105,16 @@ class Worker
} }
// If possible we will fetch new jobs for this worker // If possible we will fetch new jobs for this worker
if (!$refetched) { if (!self::getWaitingJobForPID() && Lock::acquire('worker_process', 0)) {
$entries = self::totalEntries(); self::findWorkerProcesses();
$deferred = self::deferredEntries(); Lock::release('worker_process');
if (Lock::acquire('worker_process', 0)) {
$refetched = self::findWorkerProcesses($passing_slow, $entries, $deferred);
Lock::release('worker_process');
}
} }
} }
// To avoid the quitting of multiple workers only one worker at a time will execute the check // To avoid the quitting of multiple workers only one worker at a time will execute the check
if (Lock::acquire('worker', 0)) { if (Lock::acquire('worker', 0)) {
// Count active workers and compare them with a maximum value that depends on the load // Count active workers and compare them with a maximum value that depends on the load
if (self::tooMuchWorkers($entries, $deferred)) { if (self::tooMuchWorkers()) {
Logger::log('Active worker limit reached, quitting.', Logger::DEBUG); Logger::log('Active worker limit reached, quitting.', Logger::DEBUG);
Lock::release('worker'); Lock::release('worker');
return; return;
@ -689,13 +678,10 @@ class Worker
/** /**
* @brief Checks if the number of active workers exceeds the given limits * @brief Checks if the number of active workers exceeds the given limits
* *
* @param integer $entries Total number of queue entries
* @param integer $deferred Number of deferred queue entries
*
* @return bool Are there too much workers running? * @return bool Are there too much workers running?
* @throws \Friendica\Network\HTTPException\InternalServerErrorException * @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/ */
public static function tooMuchWorkers($entries = 0, $deferred = 0) private static function tooMuchWorkers()
{ {
$queues = Config::get("system", "worker_queues", 4); $queues = Config::get("system", "worker_queues", 4);
@ -732,7 +718,7 @@ class Worker
$stamp = (float)microtime(true); $stamp = (float)microtime(true);
$jobs = DBA::p("SELECT COUNT(*) AS `jobs` FROM `workerqueue` WHERE `done` AND `executed` > UTC_TIMESTAMP() - INTERVAL ? MINUTE", $interval); $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 += (microtime(true) - $stamp);
self::$db_duration_stat += (microtime(true) - $stamp); //self::$db_duration_stat += (microtime(true) - $stamp);
if ($job = DBA::fetch($jobs)) { if ($job = DBA::fetch($jobs)) {
$jobs_per_minute[$interval] = number_format($job['jobs'] / $interval, 0); $jobs_per_minute[$interval] = number_format($job['jobs'] / $interval, 0);
} }
@ -746,12 +732,7 @@ class Worker
$idle_workers = $active; $idle_workers = $active;
if (empty($deferred) && empty($entries)) { $deferred = self::deferredEntries();
$deferred = self::deferredEntries();
$entries = max(self::totalEntries() - $deferred, 0);
}
$waiting_processes = max(0, $entries - $deferred);
if (Config::get('system', 'worker_debug')) { if (Config::get('system', 'worker_debug')) {
$waiting_processes = 0; $waiting_processes = 0;
@ -773,10 +754,14 @@ class Worker
DBA::close($processes); DBA::close($processes);
} }
DBA::close($jobs); DBA::close($jobs);
$entries = $deferred + $waiting_processes;
} else { } else {
$entries = self::totalEntries();
$waiting_processes = max(0, $entries - $deferred);
$stamp = (float)microtime(true); $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`"); $jobs = DBA::p("SELECT COUNT(*) AS `running`, `priority` FROM `process` INNER JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid` AND NOT `done` GROUP BY `priority` ORDER BY `priority`");
self::$db_duration += (microtime(true) - $stamp); self::$db_duration += (microtime(true) - $stamp);
self::$db_duration_stat += (microtime(true) - $stamp);
while ($entry = DBA::fetch($jobs)) { while ($entry = DBA::fetch($jobs)) {
$idle_workers -= $entry["running"]; $idle_workers -= $entry["running"];
@ -834,7 +819,20 @@ class Worker
return $count; return $count;
} }
public static function nextProcess() 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;
}
private static function nextProcess()
{ {
$priority = self::nextPriority(); $priority = self::nextPriority();
if (empty($priority)) { if (empty($priority)) {
@ -862,7 +860,7 @@ class Worker
return $ids; return $ids;
} }
public static function nextPriority() private static function nextPriority()
{ {
$waiting = []; $waiting = [];
$priorities = [PRIORITY_CRITICAL, PRIORITY_HIGH, PRIORITY_MEDIUM, PRIORITY_LOW, PRIORITY_NEGLIGIBLE]; $priorities = [PRIORITY_CRITICAL, PRIORITY_HIGH, PRIORITY_MEDIUM, PRIORITY_LOW, PRIORITY_NEGLIGIBLE];
@ -932,23 +930,17 @@ class Worker
/** /**
* @brief Find and claim the next worker process for us * @brief Find and claim the next worker process for us
* *
* @param boolean $passing_slow Returns if we had passed low priority processes
* @param integer $entries Total number of queue entries
* @param integer $deferred Number of deferred queue entries
* @return boolean Have we found something? * @return boolean Have we found something?
* @throws \Friendica\Network\HTTPException\InternalServerErrorException * @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/ */
private static function findWorkerProcesses(&$passing_slow, $entries, $deferred) private static function findWorkerProcesses()
{ {
$mypid = getmypid(); $mypid = getmypid();
$passing_slow = false;
$ids = self::nextProcess(); $ids = self::nextProcess();
$found = (count($ids) > 0);
// If there is no result (or we shouldn't pass lower processes) we check without priority limit // If there is no result we check without priority limit
if (!$found) { if (empty($ids)) {
$stamp = (float)microtime(true); $stamp = (float)microtime(true);
$result = DBA::select( $result = DBA::select(
'workerqueue', 'workerqueue',
@ -963,11 +955,9 @@ class Worker
$ids[] = $id["id"]; $ids[] = $id["id"];
} }
DBA::close($result); DBA::close($result);
$found = (count($ids) > 0);
} }
if ($found) { if (!empty($ids)) {
$stamp = (float)microtime(true); $stamp = (float)microtime(true);
$condition = "`id` IN (".substr(str_repeat("?, ", count($ids)), 0, -2).") AND `pid` = 0 AND NOT `done`"; $condition = "`id` IN (".substr(str_repeat("?, ", count($ids)), 0, -2).") AND `pid` = 0 AND NOT `done`";
array_unshift($ids, $condition); array_unshift($ids, $condition);
@ -976,33 +966,22 @@ class Worker
self::$db_duration_write += (microtime(true) - $stamp); self::$db_duration_write += (microtime(true) - $stamp);
} }
return $found; return !empty($ids);
} }
/** /**
* @brief Returns the next worker process * @brief Returns the next worker process
* *
* @param boolean $passing_slow Returns if we had passed low priority processes
* @param integer $entries Returns total number of queue entries
* @param integer $deferred Returns number of deferred queue entries
*
* @return string SQL statement * @return string SQL statement
* @throws \Friendica\Network\HTTPException\InternalServerErrorException * @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/ */
public static function workerProcess(&$passing_slow, &$entries, &$deferred) public static function workerProcess()
{ {
// There can already be jobs for us in the queue. // There can already be jobs for us in the queue.
$stamp = (float)microtime(true); $waiting = self::getWaitingJobForPID();
$r = DBA::select('workerqueue', [], ['pid' => getmypid(), 'done' => false]); if (!empty($waiting)) {
self::$db_duration += (microtime(true) - $stamp); return $waiting;
if (DBA::isResult($r)) {
return DBA::toArray($r);
} }
DBA::close($r);
// Counting the rows outside the lock reduces the lock time
$entries = self::totalEntries();
$deferred = self::deferredEntries();
$stamp = (float)microtime(true); $stamp = (float)microtime(true);
if (!Lock::acquire('worker_process')) { if (!Lock::acquire('worker_process')) {
@ -1010,7 +989,7 @@ class Worker
} }
self::$lock_duration += (microtime(true) - $stamp); self::$lock_duration += (microtime(true) - $stamp);
$found = self::findWorkerProcesses($passing_slow, $entries, $deferred); $found = self::findWorkerProcesses();
Lock::release('worker_process'); Lock::release('worker_process');