chdir($directory);
}
+use \Friendica\Core\Config;
+use \Friendica\Core\PConfig;
+
require_once("boot.php");
-require_once("dbm.php");
function poller_run(&$argv, &$argc){
global $a, $db;
unset($db_host, $db_user, $db_pass, $db_data);
};
- $max_processes = get_config('system', 'max_processes_backend');
- if (intval($max_processes) == 0)
- $max_processes = 5;
+ // Quit when in maintenance
+ if (get_config('system', 'maintenance', true))
+ return;
- $processlist = dbm::processlist();
- if ($processlist["list"] != "") {
- logger("Processcheck: Processes: ".$processlist["amount"]." - Processlist: ".$processlist["list"], LOGGER_DEBUG);
+ $a->start_process();
- if ($processlist["amount"] > $max_processes) {
- logger("Processcheck: Maximum number of processes for backend tasks (".$max_processes.") reached.", LOGGER_DEBUG);
- return;
- }
- }
+ $mypid = getmypid();
+
+ if ($a->max_processes_reached())
+ return;
if (poller_max_connections_reached())
return;
return;
// Checking the number of workers
- if (poller_too_much_workers(1)) {
+ if (poller_too_much_workers()) {
poller_kill_stale_workers();
return;
}
if(($argc <= 1) OR ($argv[1] != "no_cron")) {
// Run the cron job that calls all other jobs
- proc_run("php","include/cron.php");
+ proc_run(PRIORITY_MEDIUM, "include/cron.php");
// Run the cronhooks job separately from cron for being able to use a different timing
- proc_run("php","include/cronhooks.php");
+ proc_run(PRIORITY_MEDIUM, "include/cronhooks.php");
// Cleaning dead processes
poller_kill_stale_workers();
sleep(4);
// Checking number of workers
- if (poller_too_much_workers(2))
+ if (poller_too_much_workers())
return;
+ $cooldown = Config::get("system", "worker_cooldown", 0);
+
$starttime = time();
- while ($r = q("SELECT * FROM `workerqueue` WHERE `executed` = '0000-00-00 00:00:00' ORDER BY `created` LIMIT 1")) {
+ while ($r = poller_worker_process()) {
- // Log the type of database processes
- $processlist = dbm::processlist();
- if ($processlist["amount"] != "") {
- logger("Processcheck: Processes: ".$processlist["amount"]." - Processlist: ".$processlist["list"], LOGGER_DEBUG);
+ // Quit when in maintenance
+ if (get_config('system', 'maintenance', true))
+ return;
- if ($processlist["amount"] > $max_processes) {
- logger("Processcheck: Maximum number of processes for backend tasks (".$max_processes.") reached.", LOGGER_DEBUG);
- return;
- }
- }
+ // Constantly check the number of parallel database processes
+ if ($a->max_processes_reached())
+ return;
// Constantly check the number of available database connections to let the frontend be accessible at any time
if (poller_max_connections_reached())
return;
// Count active workers and compare them with a maximum value that depends on the load
- if (poller_too_much_workers(3))
+ if (poller_too_much_workers())
return;
q("UPDATE `workerqueue` SET `executed` = '%s', `pid` = %d WHERE `id` = %d AND `executed` = '0000-00-00 00:00:00'",
dbesc(datetime_convert()),
- intval(getmypid()),
+ intval($mypid),
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()));
+ $id = q("SELECT `pid`, `executed` FROM `workerqueue` WHERE `id` = %d", intval($r[0]["id"]));
if (!$id) {
- logger("Queue item ".$r[0]["id"]." was executed multiple times - skip this execution", LOGGER_DEBUG);
+ logger("Queue item ".$r[0]["id"]." vanished - skip this execution", LOGGER_DEBUG);
+ continue;
+ } elseif ((strtotime($id[0]["executed"]) <= 0) OR ($id[0]["pid"] == 0)) {
+ logger("Entry for queue item ".$r[0]["id"]." wasn't stored - we better stop here", LOGGER_DEBUG);
+ return;
+ } elseif ($id[0]["pid"] != $mypid) {
+ logger("Queue item ".$r[0]["id"]." is to be executed by process ".$id[0]["pid"]." and not by me (".$mypid.") - skip this execution", LOGGER_DEBUG);
continue;
}
require_once($include);
- $funcname=str_replace(".php", "", basename($argv[0]))."_run";
+ $funcname = str_replace(".php", "", basename($argv[0]))."_run";
if (function_exists($funcname)) {
- logger("Process ".getmypid()." - ID ".$r[0]["id"].": ".$funcname." ".$r[0]["parameter"]);
+ logger("Process ".$mypid." - Prio ".$r[0]["priority"]." - ID ".$r[0]["id"].": ".$funcname." ".$r[0]["parameter"]);
+
+ // For better logging create a new process id for every worker call
+ // But preserve the old one for the worker
+ $old_process_id = $a->process_id;
+ $a->process_id = uniqid("wrk", true);
+
$funcname($argv, $argc);
- logger("Process ".getmypid()." - ID ".$r[0]["id"].": ".$funcname." - done");
+ $a->process_id = $old_process_id;
+
+ if ($cooldown > 0) {
+ logger("Process ".$mypid." - Prio ".$r[0]["priority"]." - ID ".$r[0]["id"].": ".$funcname." - in cooldown for ".$cooldown." seconds");
+ sleep($cooldown);
+ }
+
+ logger("Process ".$mypid." - Prio ".$r[0]["priority"]." - ID ".$r[0]["id"].": ".$funcname." - done");
q("DELETE FROM `workerqueue` WHERE `id` = %d", intval($r[0]["id"]));
} else
*
*/
function poller_kill_stale_workers() {
- $r = q("SELECT `pid`, `executed` FROM `workerqueue` WHERE `executed` != '0000-00-00 00:00:00'");
+ $r = q("SELECT `pid`, `executed`, `priority`, `parameter` FROM `workerqueue` WHERE `executed` != '0000-00-00 00:00:00'");
if (!dbm::is_result($r)) {
// No processing here needed
intval($pid["pid"]));
else {
// Kill long running processes
+
+ // Check if the priority is in a valid range
+ if (!in_array($pid["priority"], array(PRIORITY_CRITICAL, PRIORITY_HIGH, PRIORITY_MEDIUM, PRIORITY_LOW, PRIORITY_NEGLIGIBLE)))
+ $pid["priority"] = PRIORITY_MEDIUM;
+
+ // Define the maximum durations
+ $max_duration_defaults = array(PRIORITY_CRITICAL => 360, PRIORITY_HIGH => 10, PRIORITY_MEDIUM => 60, PRIORITY_LOW => 180, PRIORITY_NEGLIGIBLE => 360);
+ $max_duration = $max_duration_defaults[$pid["priority"]];
+
+ $argv = json_decode($pid["parameter"]);
+ $argv[0] = basename($argv[0]);
+
+ // How long is the process already running?
$duration = (time() - strtotime($pid["executed"])) / 60;
- if ($duration > 180) {
- logger("Worker process ".$pid["pid"]." took more than 3 hours. It will be killed now.");
+ if ($duration > $max_duration) {
+ logger("Worker process ".$pid["pid"]." (".implode(" ", $argv).") took more than ".$max_duration." minutes. It will be killed now.");
posix_kill($pid["pid"], SIGTERM);
- // Question: If a process is stale: Should we remove it or should we reschedule it?
- // By now we rescheduling it. It's maybe not the wisest decision?
- q("UPDATE `workerqueue` SET `executed` = '0000-00-00 00:00:00', `pid` = 0 WHERE `pid` = %d",
+ // We killed the stale process.
+ // To avoid a blocking situation we reschedule the process at the beginning of the queue.
+ // Additionally we are lowering the priority.
+ q("UPDATE `workerqueue` SET `executed` = '0000-00-00 00:00:00', `created` = '%s',
+ `priority` = %d, `pid` = 0 WHERE `pid` = %d",
+ dbesc(datetime_convert()),
+ intval(PRIORITY_NEGLIGIBLE),
intval($pid["pid"]));
} else
- logger("Worker process ".$pid["pid"]." now runs for ".round($duration)." minutes. That's okay.", LOGGER_DEBUG);
+ logger("Worker process ".$pid["pid"]." (".implode(" ", $argv).") now runs for ".round($duration)." of ".$max_duration." allowed minutes. That's okay.", LOGGER_DEBUG);
}
}
-function poller_too_much_workers($stage) {
+function poller_too_much_workers() {
+
$queues = get_config("system", "worker_queues");
if ($queues == 0)
$queues = 4;
+ $maxqueues = $queues;
+
$active = poller_active_workers();
// Decrease the number of workers at higher load
$slope = $maxworkers / pow($maxsysload, $exponent);
$queues = ceil($slope * pow(max(0, $maxsysload - $load), $exponent));
- logger("Current load stage ".$stage.": ".$load." - maximum: ".$maxsysload." - current queues: ".$active." - maximum: ".$queues, LOGGER_DEBUG);
+ $s = q("SELECT COUNT(*) AS `total` FROM `workerqueue` WHERE `executed` = '0000-00-00 00:00:00'");
+ $entries = $s[0]["total"];
+
+ if (Config::get("system", "worker_fastlane", false) AND ($queues > 0) AND ($entries > 0) AND ($active >= $queues)) {
+ $s = q("SELECT `priority` FROM `workerqueue` WHERE `executed` = '0000-00-00 00:00:00' ORDER BY `priority` LIMIT 1");
+ $top_priority = $s[0]["priority"];
+
+ $s = q("SELECT `id` FROM `workerqueue` WHERE `priority` <= %d AND `executed` != '0000-00-00 00:00:00' LIMIT 1",
+ intval($top_priority));
+ $high_running = dbm::is_result($s);
+
+ if (!$high_running AND ($top_priority > PRIORITY_UNDEFINED) AND ($top_priority < PRIORITY_NEGLIGIBLE)) {
+ logger("There are jobs with priority ".$top_priority." waiting but none is executed. Open a fastlane.", LOGGER_DEBUG);
+ $queues = $active + 1;
+ }
+ }
+
+ // Create a list of queue entries grouped by their priority
+ $running = array(PRIORITY_CRITICAL => 0,
+ PRIORITY_HIGH => 0,
+ PRIORITY_MEDIUM => 0,
+ PRIORITY_LOW => 0,
+ PRIORITY_NEGLIGIBLE => 0);
+
+ $r = q("SELECT COUNT(*) AS `running`, `priority` FROM `process` INNER JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid` GROUP BY `priority`");
+ if (dbm::is_result($r))
+ foreach ($r AS $process)
+ $running[$process["priority"]] = $process["running"];
+
+ $processlist = "";
+ $r = q("SELECT COUNT(*) AS `entries`, `priority` FROM `workerqueue` GROUP BY `priority`");
+ if (dbm::is_result($r))
+ foreach ($r as $entry) {
+ if ($processlist != "")
+ $processlist .= ", ";
+ $processlist .= $entry["priority"].":".$running[$entry["priority"]]."/".$entry["entries"];
+ }
+
+ logger("Load: ".$load."/".$maxsysload." - processes: ".$active."/".$entries." (".$processlist.") - maximum: ".$queues."/".$maxqueues, LOGGER_DEBUG);
+ // Are there fewer workers running as possible? Then fork a new one.
+ if (!get_config("system", "worker_dont_fork") AND ($queues > ($active + 1)) AND ($entries > 1)) {
+ logger("Active workers: ".$active."/".$queues." Fork a new worker.", LOGGER_DEBUG);
+ $args = array("php", "include/poller.php", "no_cron");
+ $a = get_app();
+ $a->proc_run($args);
+ }
}
return($active >= $queues);
}
function poller_active_workers() {
- $workers = q("SELECT COUNT(*) AS `workers` FROM `workerqueue` WHERE `executed` != '0000-00-00 00:00:00'");
+ $workers = q("SELECT COUNT(*) AS `processes` FROM `process` WHERE `command` = 'poller.php'");
+
+ return($workers[0]["processes"]);
+}
+
+/**
+ * @brief Check if we should pass some slow processes
+ *
+ * When the active processes of the highest priority are using more than 2/3
+ * of all processes, we let pass slower processes.
+ *
+ * @param string $highest_priority Returns the currently highest priority
+ * @return bool We let pass a slower process than $highest_priority
+ */
+function poller_passing_slow(&$highest_priority) {
+
+ $highest_priority = 0;
+
+ $r = q("SELECT `priority`
+ FROM `process`
+ INNER JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid`
+ WHERE `process`.`command` = 'poller.php'");
+
+ // No active processes at all? Fine
+ if (!dbm::is_result($r))
+ return(false);
+
+ $priorities = array();
+ foreach ($r AS $line)
+ $priorities[] = $line["priority"];
+
+ // Should not happen
+ if (count($priorities) == 0)
+ return(false);
+
+ $highest_priority = min($priorities);
+
+ // The highest process is already the slowest one?
+ // Then we quit
+ if ($highest_priority == PRIORITY_NEGLIGIBLE)
+ return(false);
+
+ $high = 0;
+ foreach ($priorities AS $priority)
+ if ($priority == $highest_priority)
+ ++$high;
- return($workers[0]["workers"]);
+ logger("Highest priority: ".$highest_priority." Total processes: ".count($priorities)." Count high priority processes: ".$high, LOGGER_DEBUG);
+ $passing_slow = (($high/count($priorities)) > (2/3));
+
+ if ($passing_slow)
+ logger("Passing slower processes than priority ".$highest_priority, LOGGER_DEBUG);
+
+ return($passing_slow);
+}
+
+/**
+ * @brief Returns the next worker process
+ *
+ * @return string SQL statement
+ */
+
+function poller_worker_process() {
+
+ // Check if we should pass some low priority process
+ $highest_priority = 0;
+
+ if (poller_passing_slow($highest_priority)) {
+ // Are there waiting processes with a higher priority than the currently highest?
+ $r = q("SELECT * FROM `workerqueue`
+ WHERE `executed` = '0000-00-00 00:00:00' AND `priority` < %d
+ ORDER BY `priority`, `created` LIMIT 1", dbesc($highest_priority));
+ if (dbm::is_result($r))
+ return $r;
+
+ // Give slower processes some processing time
+ $r = q("SELECT * FROM `workerqueue`
+ WHERE `executed` = '0000-00-00 00:00:00' AND `priority` > %d
+ ORDER BY `priority`, `created` LIMIT 1", dbesc($highest_priority));
+ }
+
+ // If there is no result (or we shouldn't pass lower processes) we check without priority limit
+ if (($highest_priority == 0) OR !dbm::is_result($r))
+ $r = q("SELECT * FROM `workerqueue` WHERE `executed` = '0000-00-00 00:00:00' ORDER BY `priority`, `created` LIMIT 1");
+
+ return $r;
}
if (array_search(__file__,get_included_files())===0){
- poller_run($_SERVER["argv"],$_SERVER["argc"]);
- killme();
+ poller_run($_SERVER["argv"],$_SERVER["argc"]);
+
+ get_app()->end_process();
+
+ killme();
}
?>
projects / friendica.git / blobdiff