include/poller.php

   1 <?php
   2 if (!file_exists("boot.php") AND (sizeof($_SERVER["argv"]) != 0)) {
   3         $directory = dirname($_SERVER["argv"][0]);
   4
   5         if (substr($directory, 0, 1) != "/")
   6                 $directory = $_SERVER["PWD"]."/".$directory;
   7
   8         $directory = realpath($directory."/..");
   9
  10         chdir($directory);
  11 }
  12
  13 use \Friendica\Core\Config;
  14 use \Friendica\Core\PConfig;
  15
  16 require_once("boot.php");
  17
  18 function poller_run($argv, $argc){
  19         global $a, $db;
  20
  21         if(is_null($a)) {
  22                 $a = new App;
  23         }
  24
  25         if(is_null($db)) {
  26                 @include(".htconfig.php");
  27                 require_once("include/dba.php");
  28                 $db = new dba($db_host, $db_user, $db_pass, $db_data);
  29                 unset($db_host, $db_user, $db_pass, $db_data);
  30         };
  31
  32         // Quit when in maintenance
  33         if (Config::get('system', 'maintenance', true)) {
  34                 return;
  35         }
  36
  37         $a->start_process();
  38
  39         if (poller_max_connections_reached()) {
  40                 return;
  41         }
  42
  43         if ($a->maxload_reached()) {
  44                 return;
  45         }
  46
  47         if(($argc <= 1) OR ($argv[1] != "no_cron")) {
  48                 poller_run_cron();
  49         }
  50
  51         if ($a->max_processes_reached()) {
  52                 return;
  53         }
  54
  55         // Checking the number of workers
  56         if (poller_too_much_workers()) {
  57                 poller_kill_stale_workers();
  58                 return;
  59         }
  60
  61         $starttime = time();
  62
  63         while ($r = poller_worker_process()) {
  64
  65                 // Count active workers and compare them with a maximum value that depends on the load
  66                 if (poller_too_much_workers()) {
  67                         return;
  68                 }
  69
  70                 if (!poller_execute($r[0])) {
  71                         return;
  72                 }
  73
  74                 // Quit the poller once every hour
  75                 if (time() > ($starttime + 3600))
  76                         return;
  77         }
  78
  79 }
  80
  81 /**
  82  * @brief Execute a worker entry
  83  *
  84  * @param array $queue Workerqueue entry
  85  *
  86  * @return boolean "true" if further processing should be stopped
  87  */
  88 function poller_execute($queue) {
  89
  90         $a = get_app();
  91
  92         $mypid = getmypid();
  93
  94         // Quit when in maintenance
  95         if (Config::get('system', 'maintenance', true)) {
  96                 return false;
  97         }
  98
  99         // Constantly check the number of parallel database processes
 100         if ($a->max_processes_reached()) {
 101                 return false;
 102         }
 103
 104         // Constantly check the number of available database connections to let the frontend be accessible at any time
 105         if (poller_max_connections_reached()) {
 106                 return false;
 107         }
 108
 109         $upd = q("UPDATE `workerqueue` SET `executed` = '%s', `pid` = %d WHERE `id` = %d AND `pid` = 0",
 110                 dbesc(datetime_convert()),
 111                 intval($mypid),
 112                 intval($queue["id"]));
 113
 114         if (!$upd) {
 115                 logger("Couldn't update queue entry ".$queue["id"]." - skip this execution", LOGGER_DEBUG);
 116                 q("COMMIT");
 117                 return true;
 118         }
 119
 120         // Assure that there are no tasks executed twice
 121         $id = q("SELECT `pid`, `executed` FROM `workerqueue` WHERE `id` = %d", intval($queue["id"]));
 122         if (!$id) {
 123                 logger("Queue item ".$queue["id"]." vanished - skip this execution", LOGGER_DEBUG);
 124                 q("COMMIT");
 125                 return true;
 126         } elseif ((strtotime($id[0]["executed"]) <= 0) OR ($id[0]["pid"] == 0)) {
 127                 logger("Entry for queue item ".$queue["id"]." wasn't stored - skip this execution", LOGGER_DEBUG);
 128                 q("COMMIT");
 129                 return true;
 130         } elseif ($id[0]["pid"] != $mypid) {
 131                 logger("Queue item ".$queue["id"]." is to be executed by process ".$id[0]["pid"]." and not by me (".$mypid.") - skip this execution", LOGGER_DEBUG);
 132                 q("COMMIT");
 133                 return true;
 134         }
 135         q("COMMIT");
 136
 137         $argv = json_decode($queue["parameter"]);
 138
 139         // Check for existance and validity of the include file
 140         $include = $argv[0];
 141
 142         if (!validate_include($include)) {
 143                 logger("Include file ".$argv[0]." is not valid!");
 144                 q("DELETE FROM `workerqueue` WHERE `id` = %d", intval($queue["id"]));
 145                 return true;
 146         }
 147
 148         require_once($include);
 149
 150         $funcname = str_replace(".php", "", basename($argv[0]))."_run";
 151
 152         if (function_exists($funcname)) {
 153
 154                 poller_exec_function($queue, $funcname, $argv);
 155
 156                 q("DELETE FROM `workerqueue` WHERE `id` = %d", intval($queue["id"]));
 157         } else {
 158                 logger("Function ".$funcname." does not exist");
 159         }
 160
 161         return true;
 162 }
 163
 164 /**
 165  * @brief Execute a function from the queue
 166  *
 167  * @param array $queue Workerqueue entry
 168  * @param string $funcname name of the function
 169  * @param array $argv Array of values to be passed to the function
 170  */
 171 function poller_exec_function($queue, $funcname, $argv) {
 172
 173         $a = get_app();
 174
 175         $mypid = getmypid();
 176
 177         $argc = count($argv);
 178
 179         logger("Process ".$mypid." - Prio ".$queue["priority"]." - ID ".$queue["id"].": ".$funcname." ".$queue["parameter"]);
 180
 181         $stamp = (float)microtime(true);
 182
 183         // We use the callstack here to analyze the performance of executed worker entries.
 184         // For this reason the variables have to be initialized.
 185         if (Config::get("system", "profiler")) {
 186                 $a->performance["start"] = microtime(true);
 187                 $a->performance["database"] = 0;
 188                 $a->performance["database_write"] = 0;
 189                 $a->performance["network"] = 0;
 190                 $a->performance["file"] = 0;
 191                 $a->performance["rendering"] = 0;
 192                 $a->performance["parser"] = 0;
 193                 $a->performance["marktime"] = 0;
 194                 $a->performance["markstart"] = microtime(true);
 195                 $a->callstack = array();
 196         }
 197
 198         // For better logging create a new process id for every worker call
 199         // But preserve the old one for the worker
 200         $old_process_id = $a->process_id;
 201         $a->process_id = uniqid("wrk", true);
 202
 203         $funcname($argv, $argc);
 204
 205         $a->process_id = $old_process_id;
 206
 207         $duration = number_format(microtime(true) - $stamp, 3);
 208
 209         if ($duration > 3600) {
 210                 logger("Prio ".$queue["priority"].": ".$queue["parameter"]." - longer than 1 hour (".round($duration/60, 3).")", LOGGER_DEBUG);
 211         } elseif ($duration > 600) {
 212                 logger("Prio ".$queue["priority"].": ".$queue["parameter"]." - longer than 10 minutes (".round($duration/60, 3).")", LOGGER_DEBUG);
 213         } elseif ($duration > 300) {
 214                 logger("Prio ".$queue["priority"].": ".$queue["parameter"]." - longer than 5 minutes (".round($duration/60, 3).")", LOGGER_DEBUG);
 215         } elseif ($duration > 120) {
 216                 logger("Prio ".$queue["priority"].": ".$queue["parameter"]." - longer than 2 minutes (".round($duration/60, 3).")", LOGGER_DEBUG);
 217         }
 218
 219         logger("Process ".$mypid." - Prio ".$queue["priority"]." - ID ".$queue["id"].": ".$funcname." - done in ".$duration." seconds.");
 220
 221         // Write down the performance values into the log
 222         if (Config::get("system", "profiler")) {
 223                 $duration = microtime(true)-$a->performance["start"];
 224
 225                 if (Config::get("rendertime", "callstack")) {
 226                         if (isset($a->callstack["database"])) {
 227                                 $o = "\nDatabase Read:\n";
 228                                 foreach ($a->callstack["database"] AS $func => $time) {
 229                                         $time = round($time, 3);
 230                                         if ($time > 0)
 231                                                 $o .= $func.": ".$time."\n";
 232                                 }
 233                         }
 234                         if (isset($a->callstack["database_write"])) {
 235                                 $o .= "\nDatabase Write:\n";
 236                                 foreach ($a->callstack["database_write"] AS $func => $time) {
 237                                         $time = round($time, 3);
 238                                         if ($time > 0)
 239                                                 $o .= $func.": ".$time."\n";
 240                                 }
 241                         }
 242                         if (isset($a->callstack["network"])) {
 243                                 $o .= "\nNetwork:\n";
 244                                 foreach ($a->callstack["network"] AS $func => $time) {
 245                                         $time = round($time, 3);
 246                                         if ($time > 0)
 247                                                 $o .= $func.": ".$time."\n";
 248                                 }
 249                         }
 250                 } else {
 251                         $o = '';
 252                 }
 253
 254                 logger("ID ".$queue["id"].": ".$funcname.": ".sprintf("DB: %s/%s, Net: %s, I/O: %s, Other: %s, Total: %s".$o,
 255                         number_format($a->performance["database"] - $a->performance["database_write"], 2),
 256                         number_format($a->performance["database_write"], 2),
 257                         number_format($a->performance["network"], 2),
 258                         number_format($a->performance["file"], 2),
 259                         number_format($duration - ($a->performance["database"] + $a->performance["network"] + $a->performance["file"]), 2),
 260                         number_format($duration, 2)),
 261                         LOGGER_DEBUG);
 262         }
 263
 264         $cooldown = Config::get("system", "worker_cooldown", 0);
 265
 266         if ($cooldown > 0) {
 267                 logger("Process ".$mypid." - Prio ".$queue["priority"]." - ID ".$queue["id"].": ".$funcname." - in cooldown for ".$cooldown." seconds");
 268                 sleep($cooldown);
 269         }
 270 }
 271
 272 /**
 273  * @brief Checks if the number of database connections has reached a critical limit.
 274  *
 275  * @return bool Are more than 3/4 of the maximum connections used?
 276  */
 277 function poller_max_connections_reached() {
 278
 279         // Fetch the max value from the config. This is needed when the system cannot detect the correct value by itself.
 280         $max = Config::get("system", "max_connections");
 281
 282         // Fetch the percentage level where the poller will get active
 283         $maxlevel = Config::get("system", "max_connections_level", 75);
 284
 285         if ($max == 0) {
 286                 // the maximum number of possible user connections can be a system variable
 287                 $r = q("SHOW VARIABLES WHERE `variable_name` = 'max_user_connections'");
 288                 if ($r)
 289                         $max = $r[0]["Value"];
 290
 291                 // Or it can be granted. This overrides the system variable
 292                 $r = q("SHOW GRANTS");
 293                 if ($r)
 294                         foreach ($r AS $grants) {
 295                                 $grant = array_pop($grants);
 296                                 if (stristr($grant, "GRANT USAGE ON"))
 297                                         if (preg_match("/WITH MAX_USER_CONNECTIONS (\d*)/", $grant, $match))
 298                                                 $max = $match[1];
 299                         }
 300         }
 301
 302         // If $max is set we will use the processlist to determine the current number of connections
 303         // The processlist only shows entries of the current user
 304         if ($max != 0) {
 305                 $r = q("SHOW PROCESSLIST");
 306                 if (!dbm::is_result($r))
 307                         return false;
 308
 309                 $used = count($r);
 310
 311                 logger("Connection usage (user values): ".$used."/".$max, LOGGER_DEBUG);
 312
 313                 $level = ($used / $max) * 100;
 314
 315                 if ($level >= $maxlevel) {
 316                         logger("Maximum level (".$maxlevel."%) of user connections reached: ".$used."/".$max);
 317                         return true;
 318                 }
 319         }
 320
 321         // We will now check for the system values.
 322         // This limit could be reached although the user limits are fine.
 323         $r = q("SHOW VARIABLES WHERE `variable_name` = 'max_connections'");
 324         if (!$r)
 325                 return false;
 326
 327         $max = intval($r[0]["Value"]);
 328         if ($max == 0)
 329                 return false;
 330
 331         $r = q("SHOW STATUS WHERE `variable_name` = 'Threads_connected'");
 332         if (!$r)
 333                 return false;
 334
 335         $used = intval($r[0]["Value"]);
 336         if ($used == 0)
 337                 return false;
 338
 339         logger("Connection usage (system values): ".$used."/".$max, LOGGER_DEBUG);
 340
 341         $level = $used / $max * 100;
 342
 343         if ($level < $maxlevel)
 344                 return false;
 345
 346         logger("Maximum level (".$level."%) of system connections reached: ".$used."/".$max);
 347         return true;
 348 }
 349
 350 /**
 351  * @brief fix the queue entry if the worker process died
 352  *
 353  */
 354 function poller_kill_stale_workers() {
 355         $r = q("SELECT `pid`, `executed`, `priority`, `parameter` FROM `workerqueue` WHERE `executed` != '0000-00-00 00:00:00'");
 356
 357         if (!dbm::is_result($r)) {
 358                 // No processing here needed
 359                 return;
 360         }
 361
 362         foreach($r AS $pid)
 363                 if (!posix_kill($pid["pid"], 0))
 364                         q("UPDATE `workerqueue` SET `executed` = '0000-00-00 00:00:00', `pid` = 0 WHERE `pid` = %d",
 365                                 intval($pid["pid"]));
 366                 else {
 367                         // Kill long running processes
 368
 369                         // Check if the priority is in a valid range
 370                         if (!in_array($pid["priority"], array(PRIORITY_CRITICAL, PRIORITY_HIGH, PRIORITY_MEDIUM, PRIORITY_LOW, PRIORITY_NEGLIGIBLE)))
 371                                 $pid["priority"] = PRIORITY_MEDIUM;
 372
 373                         // Define the maximum durations
 374                         $max_duration_defaults = array(PRIORITY_CRITICAL => 360, PRIORITY_HIGH => 10, PRIORITY_MEDIUM => 60, PRIORITY_LOW => 180, PRIORITY_NEGLIGIBLE => 360);
 375                         $max_duration = $max_duration_defaults[$pid["priority"]];
 376
 377                         $argv = json_decode($pid["parameter"]);
 378                         $argv[0] = basename($argv[0]);
 379
 380                         // How long is the process already running?
 381                         $duration = (time() - strtotime($pid["executed"])) / 60;
 382                         if ($duration > $max_duration) {
 383                                 logger("Worker process ".$pid["pid"]." (".implode(" ", $argv).") took more than ".$max_duration." minutes. It will be killed now.");
 384                                 posix_kill($pid["pid"], SIGTERM);
 385
 386                                 // We killed the stale process.
 387                                 // To avoid a blocking situation we reschedule the process at the beginning of the queue.
 388                                 // Additionally we are lowering the priority.
 389                                 q("UPDATE `workerqueue` SET `executed` = '0000-00-00 00:00:00', `created` = '%s',
 390                                                         `priority` = %d, `pid` = 0 WHERE `pid` = %d",
 391                                         dbesc(datetime_convert()),
 392                                         intval(PRIORITY_NEGLIGIBLE),
 393                                         intval($pid["pid"]));
 394                         } else
 395                                 logger("Worker process ".$pid["pid"]." (".implode(" ", $argv).") now runs for ".round($duration)." of ".$max_duration." allowed minutes. That's okay.", LOGGER_DEBUG);
 396                 }
 397 }
 398
 399 /**
 400  * @brief Checks if the number of active workers exceeds the given limits
 401  *
 402  * @return bool Are there too much workers running?
 403  */
 404 function poller_too_much_workers() {
 405         $queues = Config::get("system", "worker_queues", 4);
 406
 407         $maxqueues = $queues;
 408
 409         $active = poller_active_workers();
 410
 411         // Decrease the number of workers at higher load
 412         $load = current_load();
 413         if($load) {
 414                 $maxsysload = intval(Config::get("system", "maxloadavg", 50));
 415
 416                 $maxworkers = $queues;
 417
 418                 // Some magical mathemathics to reduce the workers
 419                 $exponent = 3;
 420                 $slope = $maxworkers / pow($maxsysload, $exponent);
 421                 $queues = ceil($slope * pow(max(0, $maxsysload - $load), $exponent));
 422
 423                 $s = q("SELECT COUNT(*) AS `total` FROM `workerqueue` WHERE `executed` = '0000-00-00 00:00:00'");
 424                 $entries = $s[0]["total"];
 425
 426                 if (Config::get("system", "worker_fastlane", false) AND ($queues > 0) AND ($entries > 0) AND ($active >= $queues)) {
 427                         $s = q("SELECT `priority` FROM `workerqueue` WHERE `executed` = '0000-00-00 00:00:00' ORDER BY `priority` LIMIT 1");
 428                         $top_priority = $s[0]["priority"];
 429
 430                         $s = q("SELECT `id` FROM `workerqueue` WHERE `priority` <= %d AND `executed` != '0000-00-00 00:00:00' LIMIT 1",
 431                                 intval($top_priority));
 432                         $high_running = dbm::is_result($s);
 433
 434                         if (!$high_running AND ($top_priority > PRIORITY_UNDEFINED) AND ($top_priority < PRIORITY_NEGLIGIBLE)) {
 435                                 logger("There are jobs with priority ".$top_priority." waiting but none is executed. Open a fastlane.", LOGGER_DEBUG);
 436                                 $queues = $active + 1;
 437                         }
 438                 }
 439
 440                 // Create a list of queue entries grouped by their priority
 441                 $running = array(PRIORITY_CRITICAL => 0,
 442                                 PRIORITY_HIGH => 0,
 443                                 PRIORITY_MEDIUM => 0,
 444                                 PRIORITY_LOW => 0,
 445                                 PRIORITY_NEGLIGIBLE => 0);
 446
 447                 $r = q("SELECT COUNT(*) AS `running`, `priority` FROM `process` INNER JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid` GROUP BY `priority`");
 448                 if (dbm::is_result($r))
 449                         foreach ($r AS $process)
 450                                 $running[$process["priority"]] = $process["running"];
 451
 452                 $processlist = "";
 453                 $r = q("SELECT COUNT(*) AS `entries`, `priority` FROM `workerqueue` GROUP BY `priority`");
 454                 if (dbm::is_result($r))
 455                         foreach ($r as $entry) {
 456                                 if ($processlist != "")
 457                                         $processlist .= ", ";
 458                                 $processlist .= $entry["priority"].":".$running[$entry["priority"]]."/".$entry["entries"];
 459                         }
 460
 461                 logger("Load: ".$load."/".$maxsysload." - processes: ".$active."/".$entries." (".$processlist.") - maximum: ".$queues."/".$maxqueues, LOGGER_DEBUG);
 462
 463                 // Are there fewer workers running as possible? Then fork a new one.
 464                 if (!Config::get("system", "worker_dont_fork") AND ($queues > ($active + 1)) AND ($entries > 1)) {
 465                         logger("Active workers: ".$active."/".$queues." Fork a new worker.", LOGGER_DEBUG);
 466                         $args = array("php", "include/poller.php", "no_cron");
 467                         $a = get_app();
 468                         $a->proc_run($args);
 469                 }
 470         }
 471
 472         return($active >= $queues);
 473 }
 474
 475 /**
 476  * @brief Returns the number of active poller processes
 477  *
 478  * @return integer Number of active poller processes
 479  */
 480 function poller_active_workers() {
 481         $workers = q("SELECT COUNT(*) AS `processes` FROM `process` WHERE `command` = 'poller.php'");
 482
 483         return($workers[0]["processes"]);
 484 }
 485
 486 /**
 487  * @brief Check if we should pass some slow processes
 488  *
 489  * When the active processes of the highest priority are using more than 2/3
 490  * of all processes, we let pass slower processes.
 491  *
 492  * @param string $highest_priority Returns the currently highest priority
 493  * @return bool We let pass a slower process than $highest_priority
 494  */
 495 function poller_passing_slow(&$highest_priority) {
 496
 497         $highest_priority = 0;
 498
 499         $r = q("SELECT `priority`
 500                 FROM `process`
 501                 INNER JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid`");
 502
 503         // No active processes at all? Fine
 504         if (!dbm::is_result($r))
 505                 return(false);
 506
 507         $priorities = array();
 508         foreach ($r AS $line)
 509                 $priorities[] = $line["priority"];
 510
 511         // Should not happen
 512         if (count($priorities) == 0)
 513                 return(false);
 514
 515         $highest_priority = min($priorities);
 516
 517         // The highest process is already the slowest one?
 518         // Then we quit
 519         if ($highest_priority == PRIORITY_NEGLIGIBLE)
 520                 return(false);
 521
 522         $high = 0;
 523         foreach ($priorities AS $priority)
 524                 if ($priority == $highest_priority)
 525                         ++$high;
 526
 527         logger("Highest priority: ".$highest_priority." Total processes: ".count($priorities)." Count high priority processes: ".$high, LOGGER_DEBUG);
 528         $passing_slow = (($high/count($priorities)) > (2/3));
 529
 530         if ($passing_slow)
 531                 logger("Passing slower processes than priority ".$highest_priority, LOGGER_DEBUG);
 532
 533         return($passing_slow);
 534 }
 535
 536 /**
 537  * @brief Returns the next worker process
 538  *
 539  * @return string SQL statement
 540  */
 541 function poller_worker_process() {
 542
 543         q("START TRANSACTION;");
 544
 545         // Check if we should pass some low priority process
 546         $highest_priority = 0;
 547
 548         if (poller_passing_slow($highest_priority)) {
 549                 // Are there waiting processes with a higher priority than the currently highest?
 550                 $r = q("SELECT * FROM `workerqueue`
 551                                 WHERE `executed` = '0000-00-00 00:00:00' AND `priority` < %d
 552                                 ORDER BY `priority`, `created` LIMIT 1", dbesc($highest_priority));
 553                 if (dbm::is_result($r))
 554                         return $r;
 555
 556                 // Give slower processes some processing time
 557                 $r = q("SELECT * FROM `workerqueue`
 558                                 WHERE `executed` = '0000-00-00 00:00:00' AND `priority` > %d
 559                                 ORDER BY `priority`, `created` LIMIT 1", dbesc($highest_priority));
 560         }
 561
 562         // If there is no result (or we shouldn't pass lower processes) we check without priority limit
 563         if (($highest_priority == 0) OR !dbm::is_result($r))
 564                 $r = q("SELECT * FROM `workerqueue` WHERE `executed` = '0000-00-00 00:00:00' ORDER BY `priority`, `created` LIMIT 1");
 565
 566         return $r;
 567 }
 568
 569 /**
 570  * @brief Call the front end worker
 571  */
 572 function call_worker() {
 573         if (!Config::get("system", "frontend_worker") OR !Config::get("system", "worker")) {
 574                 return;
 575         }
 576
 577         $url = App::get_baseurl()."/worker";
 578         fetch_url($url, false, $redirects, 1);
 579 }
 580
 581 /**
 582  * @brief Call the front end worker if there aren't any active
 583  */
 584 function call_worker_if_idle() {
 585         if (!Config::get("system", "frontend_worker") OR !Config::get("system", "worker")) {
 586                 return;
 587         }
 588
 589         // Do we have "proc_open"? Then we can fork the poller
 590         if (function_exists("proc_open")) {
 591                 // When was the last time that we called the worker?
 592                 // Less than one minute? Then we quit
 593                 if ((time() - Config::get("system", "worker_started")) < 60) {
 594                         return;
 595                 }
 596
 597                 set_config("system", "worker_started", time());
 598
 599                 // Do we have enough running workers? Then we quit here.
 600                 if (poller_too_much_workers()) {
 601                         // Cleaning dead processes
 602                         poller_kill_stale_workers();
 603                         get_app()->remove_inactive_processes();
 604
 605                         return;
 606                 }
 607
 608                 poller_run_cron();
 609
 610                 logger('Call poller', LOGGER_DEBUG);
 611
 612                 $args = array("php", "include/poller.php", "no_cron");
 613                 $a = get_app();
 614                 $a->proc_run($args);
 615                 return;
 616         }
 617
 618         // We cannot execute background processes.
 619         // We now run the processes from the frontend.
 620         // This won't work with long running processes.
 621         poller_run_cron();
 622
 623         clear_worker_processes();
 624
 625         $workers = q("SELECT COUNT(*) AS `processes` FROM `process` WHERE `command` = 'worker.php'");
 626
 627         if ($workers[0]["processes"] == 0) {
 628                 call_worker();
 629         }
 630 }
 631
 632 /**
 633  * @brief Removes long running worker processes
 634  */
 635 function clear_worker_processes() {
 636         $timeout = Config::get("system", "frontend_worker_timeout", 10);
 637
 638         /// @todo We should clean up the corresponding workerqueue entries as well
 639         q("DELETE FROM `process` WHERE `created` < '%s' AND `command` = 'worker.php'",
 640                 dbesc(datetime_convert('UTC','UTC',"now - ".$timeout." minutes")));
 641 }
 642
 643 /**
 644  * @brief Runs the cron processes
 645  */
 646 function poller_run_cron() {
 647         logger('Add cron entries', LOGGER_DEBUG);
 648
 649         // Check for spooled items
 650         proc_run(PRIORITY_HIGH, "include/spool_post.php");
 651
 652         // Run the cron job that calls all other jobs
 653         proc_run(PRIORITY_MEDIUM, "include/cron.php");
 654
 655         // Run the cronhooks job separately from cron for being able to use a different timing
 656         proc_run(PRIORITY_MEDIUM, "include/cronhooks.php");
 657
 658         // Cleaning dead processes
 659         poller_kill_stale_workers();
 660 }
 661
 662 if (array_search(__file__,get_included_files())===0){
 663         poller_run($_SERVER["argv"],$_SERVER["argc"]);
 664
 665         get_app()->end_process();
 666
 667         killme();
 668 }
 669 ?>