include/poller.php

   1 <?php
   2
   3 use Friendica\App;
   4 use Friendica\Core\Config;
   5
   6 if (!file_exists("boot.php") AND (sizeof($_SERVER["argv"]) != 0)) {
   7         $directory = dirname($_SERVER["argv"][0]);
   8
   9         if (substr($directory, 0, 1) != "/")
  10                 $directory = $_SERVER["PWD"]."/".$directory;
  11
  12         $directory = realpath($directory."/..");
  13
  14         chdir($directory);
  15 }
  16
  17 require_once("boot.php");
  18
  19 function poller_run($argv, $argc){
  20         global $a, $db;
  21
  22         if (is_null($a)) {
  23                 $a = new App(dirname(__DIR__));
  24         }
  25
  26         if(is_null($db)) {
  27                 @include(".htconfig.php");
  28                 require_once("include/dba.php");
  29                 $db = new dba($db_host, $db_user, $db_pass, $db_data);
  30                 unset($db_host, $db_user, $db_pass, $db_data);
  31         };
  32
  33         Config::load();
  34
  35         // Quit when in maintenance
  36         if (Config::get('system', 'maintenance', true)) {
  37                 return;
  38         }
  39
  40         $a->set_baseurl(Config::get('system', 'url'));
  41
  42         load_hooks();
  43
  44         $a->start_process();
  45
  46         if ($a->min_memory_reached()) {
  47                 return;
  48         }
  49
  50         if (poller_max_connections_reached()) {
  51                 return;
  52         }
  53
  54         if ($a->maxload_reached()) {
  55                 return;
  56         }
  57
  58         if(($argc <= 1) OR ($argv[1] != "no_cron")) {
  59                 poller_run_cron();
  60         }
  61
  62         if ($a->max_processes_reached()) {
  63                 return;
  64         }
  65
  66         // Checking the number of workers
  67         if (poller_too_much_workers()) {
  68                 poller_kill_stale_workers();
  69                 return;
  70         }
  71
  72         $starttime = time();
  73
  74         while ($r = poller_worker_process()) {
  75
  76                 // Check free memory
  77                 if ($a->min_memory_reached()) {
  78                         return;
  79                 }
  80
  81                 // Count active workers and compare them with a maximum value that depends on the load
  82                 if (poller_too_much_workers()) {
  83                         return;
  84                 }
  85
  86                 if (!poller_execute($r[0])) {
  87                         return;
  88                 }
  89
  90                 // Quit the poller once every hour
  91                 if (time() > ($starttime + 3600))
  92                         return;
  93         }
  94 }
  95
  96 /**
  97  * @brief Execute a worker entry
  98  *
  99  * @param array $queue Workerqueue entry
 100  *
 101  * @return boolean "true" if further processing should be stopped
 102  */
 103 function poller_execute($queue) {
 104
 105         $a = get_app();
 106
 107         $mypid = getmypid();
 108
 109         // Quit when in maintenance
 110         if (Config::get('system', 'maintenance', true)) {
 111                 return false;
 112         }
 113
 114         // Constantly check the number of parallel database processes
 115         if ($a->max_processes_reached()) {
 116                 return false;
 117         }
 118
 119         // Constantly check the number of available database connections to let the frontend be accessible at any time
 120         if (poller_max_connections_reached()) {
 121                 return false;
 122         }
 123
 124         $upd = q("UPDATE `workerqueue` SET `executed` = '%s', `pid` = %d WHERE `id` = %d AND `pid` = 0",
 125                 dbesc(datetime_convert()),
 126                 intval($mypid),
 127                 intval($queue["id"]));
 128
 129         if (!$upd) {
 130                 logger("Couldn't update queue entry ".$queue["id"]." - skip this execution", LOGGER_DEBUG);
 131                 q("COMMIT");
 132                 return true;
 133         }
 134
 135         // Assure that there are no tasks executed twice
 136         $id = q("SELECT `pid`, `executed` FROM `workerqueue` WHERE `id` = %d", intval($queue["id"]));
 137         if (!$id) {
 138                 logger("Queue item ".$queue["id"]." vanished - skip this execution", LOGGER_DEBUG);
 139                 q("COMMIT");
 140                 return true;
 141         } elseif ((strtotime($id[0]["executed"]) <= 0) OR ($id[0]["pid"] == 0)) {
 142                 logger("Entry for queue item ".$queue["id"]." wasn't stored - skip this execution", LOGGER_DEBUG);
 143                 q("COMMIT");
 144                 return true;
 145         } elseif ($id[0]["pid"] != $mypid) {
 146                 logger("Queue item ".$queue["id"]." is to be executed by process ".$id[0]["pid"]." and not by me (".$mypid.") - skip this execution", LOGGER_DEBUG);
 147                 q("COMMIT");
 148                 return true;
 149         }
 150         q("COMMIT");
 151
 152         $argv = json_decode($queue["parameter"]);
 153
 154         // Check for existance and validity of the include file
 155         $include = $argv[0];
 156
 157         if (!validate_include($include)) {
 158                 logger("Include file ".$argv[0]." is not valid!");
 159                 q("DELETE FROM `workerqueue` WHERE `id` = %d", intval($queue["id"]));
 160                 return true;
 161         }
 162
 163         require_once($include);
 164
 165         $funcname = str_replace(".php", "", basename($argv[0]))."_run";
 166
 167         if (function_exists($funcname)) {
 168
 169                 poller_exec_function($queue, $funcname, $argv);
 170
 171                 q("DELETE FROM `workerqueue` WHERE `id` = %d", intval($queue["id"]));
 172         } else {
 173                 logger("Function ".$funcname." does not exist");
 174         }
 175
 176         return true;
 177 }
 178
 179 /**
 180  * @brief Execute a function from the queue
 181  *
 182  * @param array $queue Workerqueue entry
 183  * @param string $funcname name of the function
 184  * @param array $argv Array of values to be passed to the function
 185  */
 186 function poller_exec_function($queue, $funcname, $argv) {
 187
 188         $a = get_app();
 189
 190         $mypid = getmypid();
 191
 192         $argc = count($argv);
 193
 194         logger("Process ".$mypid." - Prio ".$queue["priority"]." - ID ".$queue["id"].": ".$funcname." ".$queue["parameter"]);
 195
 196         $stamp = (float)microtime(true);
 197
 198         // We use the callstack here to analyze the performance of executed worker entries.
 199         // For this reason the variables have to be initialized.
 200         if (Config::get("system", "profiler")) {
 201                 $a->performance["start"] = microtime(true);
 202                 $a->performance["database"] = 0;
 203                 $a->performance["database_write"] = 0;
 204                 $a->performance["network"] = 0;
 205                 $a->performance["file"] = 0;
 206                 $a->performance["rendering"] = 0;
 207                 $a->performance["parser"] = 0;
 208                 $a->performance["marktime"] = 0;
 209                 $a->performance["markstart"] = microtime(true);
 210                 $a->callstack = array();
 211         }
 212
 213         // For better logging create a new process id for every worker call
 214         // But preserve the old one for the worker
 215         $old_process_id = $a->process_id;
 216         $a->process_id = uniqid("wrk", true);
 217
 218         $funcname($argv, $argc);
 219
 220         $a->process_id = $old_process_id;
 221
 222         $duration = number_format(microtime(true) - $stamp, 3);
 223
 224         if ($duration > 3600) {
 225                 logger("Prio ".$queue["priority"].": ".$queue["parameter"]." - longer than 1 hour (".round($duration/60, 3).")", LOGGER_DEBUG);
 226         } elseif ($duration > 600) {
 227                 logger("Prio ".$queue["priority"].": ".$queue["parameter"]." - longer than 10 minutes (".round($duration/60, 3).")", LOGGER_DEBUG);
 228         } elseif ($duration > 300) {
 229                 logger("Prio ".$queue["priority"].": ".$queue["parameter"]." - longer than 5 minutes (".round($duration/60, 3).")", LOGGER_DEBUG);
 230         } elseif ($duration > 120) {
 231                 logger("Prio ".$queue["priority"].": ".$queue["parameter"]." - longer than 2 minutes (".round($duration/60, 3).")", LOGGER_DEBUG);
 232         }
 233
 234         logger("Process ".$mypid." - Prio ".$queue["priority"]." - ID ".$queue["id"].": ".$funcname." - done in ".$duration." seconds.");
 235
 236         // Write down the performance values into the log
 237         if (Config::get("system", "profiler")) {
 238                 $duration = microtime(true)-$a->performance["start"];
 239
 240                 if (Config::get("rendertime", "callstack")) {
 241                         if (isset($a->callstack["database"])) {
 242                                 $o = "\nDatabase Read:\n";
 243                                 foreach ($a->callstack["database"] AS $func => $time) {
 244                                         $time = round($time, 3);
 245                                         if ($time > 0)
 246                                                 $o .= $func.": ".$time."\n";
 247                                 }
 248                         }
 249                         if (isset($a->callstack["database_write"])) {
 250                                 $o .= "\nDatabase Write:\n";
 251                                 foreach ($a->callstack["database_write"] AS $func => $time) {
 252                                         $time = round($time, 3);
 253                                         if ($time > 0)
 254                                                 $o .= $func.": ".$time."\n";
 255                                 }
 256                         }
 257                         if (isset($a->callstack["network"])) {
 258                                 $o .= "\nNetwork:\n";
 259                                 foreach ($a->callstack["network"] AS $func => $time) {
 260                                         $time = round($time, 3);
 261                                         if ($time > 0)
 262                                                 $o .= $func.": ".$time."\n";
 263                                 }
 264                         }
 265                 } else {
 266                         $o = '';
 267                 }
 268
 269                 logger("ID ".$queue["id"].": ".$funcname.": ".sprintf("DB: %s/%s, Net: %s, I/O: %s, Other: %s, Total: %s".$o,
 270                         number_format($a->performance["database"] - $a->performance["database_write"], 2),
 271                         number_format($a->performance["database_write"], 2),
 272                         number_format($a->performance["network"], 2),
 273                         number_format($a->performance["file"], 2),
 274                         number_format($duration - ($a->performance["database"] + $a->performance["network"] + $a->performance["file"]), 2),
 275                         number_format($duration, 2)),
 276                         LOGGER_DEBUG);
 277         }
 278
 279         $cooldown = Config::get("system", "worker_cooldown", 0);
 280
 281         if ($cooldown > 0) {
 282                 logger("Process ".$mypid." - Prio ".$queue["priority"]." - ID ".$queue["id"].": ".$funcname." - in cooldown for ".$cooldown." seconds");
 283                 sleep($cooldown);
 284         }
 285 }
 286
 287 /**
 288  * @brief Checks if the number of database connections has reached a critical limit.
 289  *
 290  * @return bool Are more than 3/4 of the maximum connections used?
 291  */
 292 function poller_max_connections_reached() {
 293
 294         // Fetch the max value from the config. This is needed when the system cannot detect the correct value by itself.
 295         $max = Config::get("system", "max_connections");
 296
 297         // Fetch the percentage level where the poller will get active
 298         $maxlevel = Config::get("system", "max_connections_level", 75);
 299
 300         if ($max == 0) {
 301                 // the maximum number of possible user connections can be a system variable
 302                 $r = q("SHOW VARIABLES WHERE `variable_name` = 'max_user_connections'");
 303                 if ($r)
 304                         $max = $r[0]["Value"];
 305
 306                 // Or it can be granted. This overrides the system variable
 307                 $r = q("SHOW GRANTS");
 308                 if ($r)
 309                         foreach ($r AS $grants) {
 310                                 $grant = array_pop($grants);
 311                                 if (stristr($grant, "GRANT USAGE ON"))
 312                                         if (preg_match("/WITH MAX_USER_CONNECTIONS (\d*)/", $grant, $match))
 313                                                 $max = $match[1];
 314                         }
 315         }
 316
 317         // If $max is set we will use the processlist to determine the current number of connections
 318         // The processlist only shows entries of the current user
 319         if ($max != 0) {
 320                 $r = q("SHOW PROCESSLIST");
 321                 if (!dbm::is_result($r))
 322                         return false;
 323
 324                 $used = count($r);
 325
 326                 logger("Connection usage (user values): ".$used."/".$max, LOGGER_DEBUG);
 327
 328                 $level = ($used / $max) * 100;
 329
 330                 if ($level >= $maxlevel) {
 331                         logger("Maximum level (".$maxlevel."%) of user connections reached: ".$used."/".$max);
 332                         return true;
 333                 }
 334         }
 335
 336         // We will now check for the system values.
 337         // This limit could be reached although the user limits are fine.
 338         $r = q("SHOW VARIABLES WHERE `variable_name` = 'max_connections'");
 339         if (!$r)
 340                 return false;
 341
 342         $max = intval($r[0]["Value"]);
 343         if ($max == 0)
 344                 return false;
 345
 346         $r = q("SHOW STATUS WHERE `variable_name` = 'Threads_connected'");
 347         if (!$r)
 348                 return false;
 349
 350         $used = intval($r[0]["Value"]);
 351         if ($used == 0)
 352                 return false;
 353
 354         logger("Connection usage (system values): ".$used."/".$max, LOGGER_DEBUG);
 355
 356         $level = $used / $max * 100;
 357
 358         if ($level < $maxlevel)
 359                 return false;
 360
 361         logger("Maximum level (".$level."%) of system connections reached: ".$used."/".$max);
 362         return true;
 363 }
 364
 365 /**
 366  * @brief fix the queue entry if the worker process died
 367  *
 368  */
 369 function poller_kill_stale_workers() {
 370         $r = q("SELECT `pid`, `executed`, `priority`, `parameter` FROM `workerqueue` WHERE `executed` > '%s'", dbesc(NULL_DATE));
 371
 372         if (!dbm::is_result($r)) {
 373                 // No processing here needed
 374                 return;
 375         }
 376
 377         foreach ($r AS $pid) {
 378                 if (!posix_kill($pid["pid"], 0)) {
 379                         q("UPDATE `workerqueue` SET `executed` = '%s', `pid` = 0 WHERE `pid` = %d",
 380                                 dbesc(NULL_DATE), intval($pid["pid"]));
 381                 } else {
 382                         // Kill long running processes
 383
 384                         // Check if the priority is in a valid range
 385                         if (!in_array($pid["priority"], array(PRIORITY_CRITICAL, PRIORITY_HIGH, PRIORITY_MEDIUM, PRIORITY_LOW, PRIORITY_NEGLIGIBLE)))
 386                                 $pid["priority"] = PRIORITY_MEDIUM;
 387
 388                         // Define the maximum durations
 389                         $max_duration_defaults = array(PRIORITY_CRITICAL => 360, PRIORITY_HIGH => 10, PRIORITY_MEDIUM => 60, PRIORITY_LOW => 180, PRIORITY_NEGLIGIBLE => 360);
 390                         $max_duration = $max_duration_defaults[$pid["priority"]];
 391
 392                         $argv = json_decode($pid["parameter"]);
 393                         $argv[0] = basename($argv[0]);
 394
 395                         // How long is the process already running?
 396                         $duration = (time() - strtotime($pid["executed"])) / 60;
 397                         if ($duration > $max_duration) {
 398                                 logger("Worker process ".$pid["pid"]." (".implode(" ", $argv).") took more than ".$max_duration." minutes. It will be killed now.");
 399                                 posix_kill($pid["pid"], SIGTERM);
 400
 401                                 // We killed the stale process.
 402                                 // To avoid a blocking situation we reschedule the process at the beginning of the queue.
 403                                 // Additionally we are lowering the priority.
 404                                 q("UPDATE `workerqueue` SET `executed` = '%s', `created` = '%s',
 405                                                         `priority` = %d, `pid` = 0 WHERE `pid` = %d",
 406                                         dbesc(NULL_DATE),
 407                                         dbesc(datetime_convert()),
 408                                         intval(PRIORITY_NEGLIGIBLE),
 409                                         intval($pid["pid"]));
 410                         } else {
 411                                 logger("Worker process ".$pid["pid"]." (".implode(" ", $argv).") now runs for ".round($duration)." of ".$max_duration." allowed minutes. That's okay.", LOGGER_DEBUG);
 412                         }
 413                 }
 414         }
 415 }
 416
 417 /**
 418  * @brief Checks if the number of active workers exceeds the given limits
 419  *
 420  * @return bool Are there too much workers running?
 421  */
 422 function poller_too_much_workers() {
 423         $queues = Config::get("system", "worker_queues", 4);
 424
 425         $maxqueues = $queues;
 426
 427         $active = poller_active_workers();
 428
 429         // Decrease the number of workers at higher load
 430         $load = current_load();
 431         if($load) {
 432                 $maxsysload = intval(Config::get("system", "maxloadavg", 50));
 433
 434                 $maxworkers = $queues;
 435
 436                 // Some magical mathemathics to reduce the workers
 437                 $exponent = 3;
 438                 $slope = $maxworkers / pow($maxsysload, $exponent);
 439                 $queues = ceil($slope * pow(max(0, $maxsysload - $load), $exponent));
 440
 441                 $s = q("SELECT COUNT(*) AS `total` FROM `workerqueue` WHERE `executed` <= '%s'", dbesc(NULL_DATE));
 442                 $entries = $s[0]["total"];
 443
 444                 if (Config::get("system", "worker_fastlane", false) AND ($queues > 0) AND ($entries > 0) AND ($active >= $queues)) {
 445                         $s = q("SELECT `priority` FROM `workerqueue` WHERE `executed` <= '%s' ORDER BY `priority` LIMIT 1", dbesc(NULL_DATE));
 446                         $top_priority = $s[0]["priority"];
 447
 448                         $s = q("SELECT `id` FROM `workerqueue` WHERE `priority` <= %d AND `executed` > '%s' LIMIT 1",
 449                                 intval($top_priority), dbesc(NULL_DATE));
 450                         $high_running = dbm::is_result($s);
 451
 452                         if (!$high_running AND ($top_priority > PRIORITY_UNDEFINED) AND ($top_priority < PRIORITY_NEGLIGIBLE)) {
 453                                 logger("There are jobs with priority ".$top_priority." waiting but none is executed. Open a fastlane.", LOGGER_DEBUG);
 454                                 $queues = $active + 1;
 455                         }
 456                 }
 457
 458                 // Create a list of queue entries grouped by their priority
 459                 $running = array(PRIORITY_CRITICAL => 0,
 460                                 PRIORITY_HIGH => 0,
 461                                 PRIORITY_MEDIUM => 0,
 462                                 PRIORITY_LOW => 0,
 463                                 PRIORITY_NEGLIGIBLE => 0);
 464
 465                 $r = q("SELECT COUNT(*) AS `running`, `priority` FROM `process` INNER JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid` GROUP BY `priority`");
 466                 if (dbm::is_result($r))
 467                         foreach ($r AS $process)
 468                                 $running[$process["priority"]] = $process["running"];
 469
 470                 $processlist = "";
 471                 $r = q("SELECT COUNT(*) AS `entries`, `priority` FROM `workerqueue` GROUP BY `priority`");
 472                 if (dbm::is_result($r))
 473                         foreach ($r as $entry) {
 474                                 if ($processlist != "")
 475                                         $processlist .= ", ";
 476                                 $processlist .= $entry["priority"].":".$running[$entry["priority"]]."/".$entry["entries"];
 477                         }
 478
 479                 logger("Load: ".$load."/".$maxsysload." - processes: ".$active."/".$entries." (".$processlist.") - maximum: ".$queues."/".$maxqueues, LOGGER_DEBUG);
 480
 481                 // Are there fewer workers running as possible? Then fork a new one.
 482                 if (!Config::get("system", "worker_dont_fork") AND ($queues > ($active + 1)) AND ($entries > 1)) {
 483                         logger("Active workers: ".$active."/".$queues." Fork a new worker.", LOGGER_DEBUG);
 484                         $args = array("include/poller.php", "no_cron");
 485                         $a = get_app();
 486                         $a->proc_run($args);
 487                 }
 488         }
 489
 490         return($active >= $queues);
 491 }
 492
 493 /**
 494  * @brief Returns the number of active poller processes
 495  *
 496  * @return integer Number of active poller processes
 497  */
 498 function poller_active_workers() {
 499         $workers = q("SELECT COUNT(*) AS `processes` FROM `process` WHERE `command` = 'poller.php'");
 500
 501         return($workers[0]["processes"]);
 502 }
 503
 504 /**
 505  * @brief Check if we should pass some slow processes
 506  *
 507  * When the active processes of the highest priority are using more than 2/3
 508  * of all processes, we let pass slower processes.
 509  *
 510  * @param string $highest_priority Returns the currently highest priority
 511  * @return bool We let pass a slower process than $highest_priority
 512  */
 513 function poller_passing_slow(&$highest_priority) {
 514
 515         $highest_priority = 0;
 516
 517         $r = q("SELECT `priority`
 518                 FROM `process`
 519                 INNER JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid`");
 520
 521         // No active processes at all? Fine
 522         if (!dbm::is_result($r))
 523                 return(false);
 524
 525         $priorities = array();
 526         foreach ($r AS $line)
 527                 $priorities[] = $line["priority"];
 528
 529         // Should not happen
 530         if (count($priorities) == 0)
 531                 return(false);
 532
 533         $highest_priority = min($priorities);
 534
 535         // The highest process is already the slowest one?
 536         // Then we quit
 537         if ($highest_priority == PRIORITY_NEGLIGIBLE)
 538                 return(false);
 539
 540         $high = 0;
 541         foreach ($priorities AS $priority)
 542                 if ($priority == $highest_priority)
 543                         ++$high;
 544
 545         logger("Highest priority: ".$highest_priority." Total processes: ".count($priorities)." Count high priority processes: ".$high, LOGGER_DEBUG);
 546         $passing_slow = (($high/count($priorities)) > (2/3));
 547
 548         if ($passing_slow)
 549                 logger("Passing slower processes than priority ".$highest_priority, LOGGER_DEBUG);
 550
 551         return($passing_slow);
 552 }
 553
 554 /**
 555  * @brief Returns the next worker process
 556  *
 557  * @return string SQL statement
 558  */
 559 function poller_worker_process() {
 560
 561         q("START TRANSACTION;");
 562
 563         // Check if we should pass some low priority process
 564         $highest_priority = 0;
 565
 566         if (poller_passing_slow($highest_priority)) {
 567                 // Are there waiting processes with a higher priority than the currently highest?
 568                 $r = q("SELECT * FROM `workerqueue`
 569                                 WHERE `executed` <= '%s' AND `priority` < %d
 570                                 ORDER BY `priority`, `created` LIMIT 1",
 571                                 dbesc(NULL_DATE),
 572                                 intval($highest_priority));
 573                 if (dbm::is_result($r)) {
 574                         return $r;
 575                 }
 576                 // Give slower processes some processing time
 577                 $r = q("SELECT * FROM `workerqueue`
 578                                 WHERE `executed` <= '%s' AND `priority` > %d
 579                                 ORDER BY `priority`, `created` LIMIT 1",
 580                                 dbesc(NULL_DATE),
 581                                 intval($highest_priority));
 582         }
 583
 584         // If there is no result (or we shouldn't pass lower processes) we check without priority limit
 585         if (($highest_priority == 0) OR !dbm::is_result($r)) {
 586                 $r = q("SELECT * FROM `workerqueue` WHERE `executed` <= '%s' ORDER BY `priority`, `created` LIMIT 1", dbesc(NULL_DATE));
 587         }
 588         return $r;
 589 }
 590
 591 /**
 592  * @brief Call the front end worker
 593  */
 594 function call_worker() {
 595         if (!Config::get("system", "frontend_worker")) {
 596                 return;
 597         }
 598
 599         $url = App::get_baseurl()."/worker";
 600         fetch_url($url, false, $redirects, 1);
 601 }
 602
 603 /**
 604  * @brief Call the front end worker if there aren't any active
 605  */
 606 function call_worker_if_idle() {
 607         if (!Config::get("system", "frontend_worker")) {
 608                 return;
 609         }
 610
 611         // Do we have "proc_open"? Then we can fork the poller
 612         if (function_exists("proc_open")) {
 613                 // When was the last time that we called the worker?
 614                 // Less than one minute? Then we quit
 615                 if ((time() - Config::get("system", "worker_started")) < 60) {
 616                         return;
 617                 }
 618
 619                 set_config("system", "worker_started", time());
 620
 621                 // Do we have enough running workers? Then we quit here.
 622                 if (poller_too_much_workers()) {
 623                         // Cleaning dead processes
 624                         poller_kill_stale_workers();
 625                         get_app()->remove_inactive_processes();
 626
 627                         return;
 628                 }
 629
 630                 poller_run_cron();
 631
 632                 logger('Call poller', LOGGER_DEBUG);
 633
 634                 $args = array("include/poller.php", "no_cron");
 635                 $a = get_app();
 636                 $a->proc_run($args);
 637                 return;
 638         }
 639
 640         // We cannot execute background processes.
 641         // We now run the processes from the frontend.
 642         // This won't work with long running processes.
 643         poller_run_cron();
 644
 645         clear_worker_processes();
 646
 647         $workers = q("SELECT COUNT(*) AS `processes` FROM `process` WHERE `command` = 'worker.php'");
 648
 649         if ($workers[0]["processes"] == 0) {
 650                 call_worker();
 651         }
 652 }
 653
 654 /**
 655  * @brief Removes long running worker processes
 656  */
 657 function clear_worker_processes() {
 658         $timeout = Config::get("system", "frontend_worker_timeout", 10);
 659
 660         /// @todo We should clean up the corresponding workerqueue entries as well
 661         q("DELETE FROM `process` WHERE `created` < '%s' AND `command` = 'worker.php'",
 662                 dbesc(datetime_convert('UTC','UTC',"now - ".$timeout." minutes")));
 663 }
 664
 665 /**
 666  * @brief Runs the cron processes
 667  */
 668 function poller_run_cron() {
 669         logger('Add cron entries', LOGGER_DEBUG);
 670
 671         // Check for spooled items
 672         proc_run(PRIORITY_HIGH, "include/spool_post.php");
 673
 674         // Run the cron job that calls all other jobs
 675         proc_run(PRIORITY_MEDIUM, "include/cron.php");
 676
 677         // Run the cronhooks job separately from cron for being able to use a different timing
 678         proc_run(PRIORITY_MEDIUM, "include/cronhooks.php");
 679
 680         // Cleaning dead processes
 681         poller_kill_stale_workers();
 682 }
 683
 684 if (array_search(__file__,get_included_files())===0){
 685         poller_run($_SERVER["argv"],$_SERVER["argc"]);
 686
 687         get_app()->end_process();
 688
 689         killme();
 690 }