<?php if (!file_exists("boot.php") AND (sizeof($_SERVER["argv"]) != 0)) { $directory = dirname($_SERVER["argv"][0]); if (substr($directory, 0, 1) != "/") $directory = $_SERVER["PWD"]."/".$directory; $directory = realpath($directory."/.."); chdir($directory); } require_once("boot.php"); function poller_run(&$argv, &$argc){ global $a, $db; if(is_null($a)) { $a = new App; } if(is_null($db)) { @include(".htconfig.php"); require_once("include/dba.php"); $db = new dba($db_host, $db_user, $db_pass, $db_data); unset($db_host, $db_user, $db_pass, $db_data); }; if(function_exists('sys_getloadavg')) { $maxsysload = intval(get_config('system','maxloadavg')); if($maxsysload < 1) $maxsysload = 50; $load = sys_getloadavg(); if(intval($load[0]) > $maxsysload) { logger('system: load ' . $load[0] . ' too high. poller deferred to next scheduled run.'); return; } } if(($argc <= 1) OR ($argv[1] != "no_cron")) { // Run the cron job that calls all other jobs proc_run("php","include/cron.php"); // Run the cronhooks job separately from cron for being able to use a different timing proc_run("php","include/cronhooks.php"); // Cleaning dead processes $r = q("SELECT DISTINCT(`pid`) FROM `workerqueue` WHERE `executed` != '0000-00-00 00:00:00'"); foreach($r AS $pid) if (!posix_kill($pid["pid"], 0)) q("UPDATE `workerqueue` SET `executed` = '0000-00-00 00:00:00', `pid` = 0 WHERE `pid` = %d", intval($pid["pid"])); else { // To-Do: Kill long running processes // But: Update processes (like the database update) mustn't be killed } } else // Sleep two seconds before checking for running processes to avoid having too many workers sleep(4); // Checking number of workers if (poller_too_much_workers()) return; $starttime = time(); while ($r = q("SELECT * FROM `workerqueue` WHERE `executed` = '0000-00-00 00:00:00' ORDER BY `created` LIMIT 1")) { q("UPDATE `workerqueue` SET `executed` = '%s', `pid` = %d WHERE `id` = %d AND `executed` = '0000-00-00 00:00:00'", dbesc(datetime_convert()), intval(getmypid()), intval($r[0]["id"])); // Assure that there are no tasks executed twice $id = q("SELECT `id` FROM `workerqueue` WHERE `id` = %d AND `pid` = %d", intval($r[0]["id"]), intval(getmypid())); if (!$id) { logger("Queue item ".$r[0]["id"]." was executed multiple times - skip this execution", LOGGER_DEBUG); continue; } $argv = json_decode($r[0]["parameter"]); $argc = count($argv); // Check for existance and validity of the include file $include = $argv[0]; if (!validate_include($include)) { logger("Include file ".$argv[0]." is not valid!"); q("DELETE FROM `workerqueue` WHERE `id` = %d", intval($r[0]["id"])); continue; } require_once($include); $funcname=str_replace(".php", "", basename($argv[0]))."_run"; if (function_exists($funcname)) { logger("Process ".getmypid().": ".$funcname." ".$r[0]["parameter"]); $funcname($argv, $argc); logger("Process ".getmypid().": ".$funcname." - done"); q("DELETE FROM `workerqueue` WHERE `id` = %d", intval($r[0]["id"])); } else logger("Function ".$funcname." does not exist"); // Quit the poller once every hour if (time() > ($starttime + 3600)) return; // Count active workers and compare them with a maximum value that depends on the load if (poller_too_much_workers()) return; } } function poller_too_much_workers() { $queues = get_config("system", "worker_queues"); if ($queues == 0) $queues = 4; $active = poller_active_workers(); // Decrease the number of workers at higher load if(function_exists('sys_getloadavg')) { $load = max(sys_getloadavg()); $maxsysload = intval(get_config('system','maxloadavg')); if($maxsysload < 1) $maxsysload = 50; $maxworkers = $queues; // Some magical mathemathics to reduce the workers $exponent = 3; $slope = $maxworkers / pow($maxsysload, $exponent); $queues = ceil($slope * pow(max(0, $maxsysload - $load), $exponent)); logger("Current load: ".$load." - maximum: ".$maxsysload." - current queues: ".$active." - maximum: ".$queues, LOGGER_DEBUG); } return($active >= $queues); } function poller_active_workers() { $workers = q("SELECT COUNT(*) AS `workers` FROM `workerqueue` WHERE `executed` != '0000-00-00 00:00:00'"); return($workers[0]["workers"]); } if (array_search(__file__,get_included_files())===0){ poller_run($_SERVER["argv"],$_SERVER["argc"]); killme(); } ?>