while ($r = poller_worker_process()) {
+ if (!poller_claim_process($r[0])) {
+ continue;
+ }
+
// Check free memory
if ($a->min_memory_reached()) {
return;
// Quit when in maintenance
if (Config::get('system', 'maintenance', true)) {
+ logger("Maintenance mode - quit process ".$mypid, LOGGER_DEBUG);
return false;
}
// Constantly check the number of parallel database processes
if ($a->max_processes_reached()) {
+ logger("Max processes reached for process ".$mypid, LOGGER_DEBUG);
return false;
}
// Constantly check the number of available database connections to let the frontend be accessible at any time
if (poller_max_connections_reached()) {
+ logger("Max connection reached for process ".$mypid, LOGGER_DEBUG);
return false;
}
- if (!dba::update('workerqueue', array('executed' => datetime_convert(), 'pid' => $mypid),
- array('id' => $queue["id"], 'pid' => 0))) {
- logger("Couldn't update queue entry ".$queue["id"]." - skip this execution", LOGGER_DEBUG);
- dba::commit();
- return true;
- }
-
- // Assure that there are no tasks executed twice
- $id = q("SELECT `pid`, `executed` FROM `workerqueue` WHERE `id` = %d", intval($queue["id"]));
- if (!$id) {
- logger("Queue item ".$queue["id"]." vanished - skip this execution", LOGGER_DEBUG);
- dba::commit();
- return true;
- } elseif ((strtotime($id[0]["executed"]) <= 0) OR ($id[0]["pid"] == 0)) {
- logger("Entry for queue item ".$queue["id"]." wasn't stored - skip this execution", LOGGER_DEBUG);
- dba::commit();
- return true;
- } elseif ($id[0]["pid"] != $mypid) {
- logger("Queue item ".$queue["id"]." is to be executed by process ".$id[0]["pid"]." and not by me (".$mypid.") - skip this execution", LOGGER_DEBUG);
- dba::commit();
- return true;
- }
- dba::commit();
-
$argv = json_decode($queue["parameter"]);
// Check for existance and validity of the include file
$maxqueues = $queues;
- $active = poller_active_workers();
-
// Decrease the number of workers at higher load
$load = current_load();
- if($load) {
+ if ($load) {
$maxsysload = intval(Config::get("system", "maxloadavg", 50));
$maxworkers = $queues;
$slope = $maxworkers / pow($maxsysload, $exponent);
$queues = ceil($slope * pow(max(0, $maxsysload - $load), $exponent));
+ $active = 0;
+
+ // Create a list of queue entries grouped by their priority
+ $listitem = array();
+
+ // Adding all processes with no workerqueue entry
+ $processes = dba::p("SELECT COUNT(*) AS `running` FROM `process` WHERE NOT EXISTS (SELECT id FROM `workerqueue` WHERE `workerqueue`.`pid` = `process`.`pid`)");
+ if ($process = dba::fetch($processes)) {
+ $listitem[0] = "0:".$process["running"];
+ $active += $process["running"];
+ }
+ dba::close($processes);
+
+ // Now adding all processes with workerqueue entries
+ $entries = dba::p("SELECT COUNT(*) AS `entries`, `priority` FROM `workerqueue` GROUP BY `priority`");
+ while ($entry = dba::fetch($entries)) {
+ $processes = dba::p("SELECT COUNT(*) AS `running` FROM `process` LEFT JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid` WHERE `priority` = ?", $entry["priority"]);
+ if ($process = dba::fetch($processes)) {
+ $listitem[$entry["priority"]] = $entry["priority"].":".$process["running"]."/".$entry["entries"];
+ $active += $process["running"];
+ }
+ dba::close($processes);
+ }
+ dba::close($entries);
+
+ $processlist = implode(', ', $listitem);
+
$s = q("SELECT COUNT(*) AS `total` FROM `workerqueue` WHERE `executed` <= '%s'", dbesc(NULL_DATE));
$entries = $s[0]["total"];
}
}
- // 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.
$a = get_app();
$a->proc_run($args);
}
+ } else {
+ $active = poller_active_workers();
}
return($active >= $queues);
// Are there waiting processes with a higher priority than the currently highest?
$r = q("SELECT * FROM `workerqueue`
WHERE `executed` <= '%s' AND `priority` < %d
- ORDER BY `priority`, `created` LIMIT 1",
+ ORDER BY `priority`, `created` LIMIT 1 FOR UPDATE",
dbesc(NULL_DATE),
intval($highest_priority));
if (dbm::is_result($r)) {
// Give slower processes some processing time
$r = q("SELECT * FROM `workerqueue`
WHERE `executed` <= '%s' AND `priority` > %d
- ORDER BY `priority`, `created` LIMIT 1",
+ ORDER BY `priority`, `created` LIMIT 1 FOR UPDATE",
dbesc(NULL_DATE),
intval($highest_priority));
+
+ if (dbm::is_result($r)) {
+ return $r;
+ }
}
// If there is no result (or we shouldn't pass lower processes) we check without priority limit
- if (($highest_priority == 0) OR !dbm::is_result($r)) {
- $r = q("SELECT * FROM `workerqueue` WHERE `executed` <= '%s' ORDER BY `priority`, `created` LIMIT 1", dbesc(NULL_DATE));
+ if (!dbm::is_result($r)) {
+ $r = q("SELECT * FROM `workerqueue` WHERE `executed` <= '%s' ORDER BY `priority`, `created` LIMIT 1 FOR UPDATE", dbesc(NULL_DATE));
}
+
return $r;
}
+/**
+ * @brief Assigns a workerqueue entry to the current process
+ *
+ * All the checks after the update are only needed with MyISAM.
+ *
+ * @param array $queue Workerqueue entry
+ *
+ * @return boolean "true" if the claiming was successful
+ */
+function poller_claim_process($queue) {
+ $mypid = getmypid();
+
+ if (!dba::update('workerqueue', array('executed' => datetime_convert(), 'pid' => $mypid),
+ array('id' => $queue["id"], 'pid' => 0))) {
+ logger("Couldn't update queue entry ".$queue["id"]." - skip this execution", LOGGER_DEBUG);
+ dba::commit();
+ return false;
+ }
+
+ // Assure that there are no tasks executed twice
+ $id = q("SELECT `pid`, `executed` FROM `workerqueue` WHERE `id` = %d", intval($queue["id"]));
+ if (!$id) {
+ logger("Queue item ".$queue["id"]." vanished - skip this execution", LOGGER_DEBUG);
+ dba::commit();
+ return false;
+ } elseif ((strtotime($id[0]["executed"]) <= 0) OR ($id[0]["pid"] == 0)) {
+ logger("Entry for queue item ".$queue["id"]." wasn't stored - skip this execution", LOGGER_DEBUG);
+ dba::commit();
+ return false;
+ } elseif ($id[0]["pid"] != $mypid) {
+ logger("Queue item ".$queue["id"]." is to be executed by process ".$id[0]["pid"]." and not by me (".$mypid.") - skip this execution", LOGGER_DEBUG);
+ dba::commit();
+ return false;
+ }
+ dba::commit();
+ return true;
+}
+
+/**
+ * @brief Removes a workerqueue entry from the current process
+ */
+function poller_unclaim_process() {
+ $mypid = getmypid();
+
+ dba::update('workerqueue', array('executed' => NULL_DATE, 'pid' => 0), array('pid' => $mypid));
+}
+
/**
* @brief Call the front end worker
*/
if (array_search(__file__,get_included_files())===0){
poller_run($_SERVER["argv"],$_SERVER["argc"]);
+ poller_unclaim_process();
+
get_app()->end_process();
killme();
projects / friendica.git / blobdiff