use Friendica\App;
use Friendica\Core\Config;
+use Friendica\Util\Lock;
-if (!file_exists("boot.php") AND (sizeof($_SERVER["argv"]) != 0)) {
+if (!file_exists("boot.php") && (sizeof($_SERVER["argv"]) != 0)) {
$directory = dirname($_SERVER["argv"][0]);
- if (substr($directory, 0, 1) != "/")
+ if (substr($directory, 0, 1) != "/") {
$directory = $_SERVER["PWD"]."/".$directory;
-
+ }
$directory = realpath($directory."/..");
chdir($directory);
function poller_run($argv, $argc){
global $a, $db;
- if (is_null($a)) {
- $a = new App(dirname(__DIR__));
- }
+ $a = new App(dirname(__DIR__));
- if (is_null($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);
- };
+ @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, $db_data);
Config::load();
load_hooks();
+ // At first check the maximum load. We shouldn't continue with a high load
+ if ($a->maxload_reached()) {
+ logger('Pre check: maximum load reached, quitting.', LOGGER_DEBUG);
+ return;
+ }
+
+ // We now start the process. This is done after the load check since this could increase the load.
$a->start_process();
- if ($a->min_memory_reached()) {
- return;
+ // Kill stale processes every 5 minutes
+ $last_cleanup = Config::get('system', 'poller_last_cleaned', 0);
+ if (time() > ($last_cleanup + 300)) {
+ Config::set('system', 'poller_last_cleaned', time());
+ poller_kill_stale_workers();
}
- if (poller_max_connections_reached()) {
+ // Count active workers and compare them with a maximum value that depends on the load
+ if (poller_too_much_workers()) {
+ logger('Pre check: Active worker limit reached, quitting.', LOGGER_DEBUG);
return;
}
- if ($a->maxload_reached()) {
+ // Do we have too few memory?
+ if ($a->min_memory_reached()) {
+ logger('Pre check: Memory limit reached, quitting.', LOGGER_DEBUG);
return;
}
- if (($argc <= 1) OR ($argv[1] != "no_cron")) {
- poller_run_cron();
+ // Possibly there are too much database connections
+ if (poller_max_connections_reached()) {
+ logger('Pre check: maximum connections reached, quitting.', LOGGER_DEBUG);
+ return;
}
+ // Possibly there are too much database processes that block the system
if ($a->max_processes_reached()) {
+ logger('Pre check: maximum processes reached, quitting.', LOGGER_DEBUG);
return;
}
- // Checking the number of workers
- if (poller_too_much_workers()) {
- poller_kill_stale_workers();
- return;
+ // Now we start additional cron processes if we should do so
+ if (($argc <= 1) || ($argv[1] != "no_cron")) {
+ poller_run_cron();
}
$starttime = time();
+ // We fetch the next queue entry that is about to be executed
while ($r = poller_worker_process()) {
-
- // Check free memory
- if ($a->min_memory_reached()) {
- return;
+ foreach ($r AS $entry) {
+ // Assure that the priority is an integer value
+ $entry['priority'] = (int)$entry['priority'];
+
+ // The work will be done
+ if (!poller_execute($entry)) {
+ logger('Process execution failed, quitting.', LOGGER_DEBUG);
+ return;
+ }
}
- // Count active workers and compare them with a maximum value that depends on the load
- if (poller_too_much_workers()) {
- return;
- }
+ // To avoid the quitting of multiple pollers only one poller at a time will execute the check
+ if (Lock::set('poller_worker', 0)) {
+ // Count active workers and compare them with a maximum value that depends on the load
+ if (poller_too_much_workers()) {
+ logger('Active worker limit reached, quitting.', LOGGER_DEBUG);
+ return;
+ }
- if (!poller_execute($r[0])) {
- return;
+ // Check free memory
+ if ($a->min_memory_reached()) {
+ logger('Memory limit reached, quitting.', LOGGER_DEBUG);
+ return;
+ }
+ Lock::remove('poller_worker');
}
- // Quit the poller once every hour
- if (time() > ($starttime + 3600))
+ // Quit the poller once every 5 minutes
+ if (time() > ($starttime + 300)) {
+ logger('Process lifetime reached, quitting.', LOGGER_DEBUG);
return;
+ }
}
+ logger("Couldn't select a workerqueue entry, quitting.", LOGGER_DEBUG);
+}
+
+/**
+ * @brief Returns the number of non executed entries in the worker queue
+ *
+ * @return integer Number of non executed entries in the worker queue
+ */
+function poller_total_entries() {
+ $s = q("SELECT COUNT(*) AS `total` FROM `workerqueue` WHERE `executed` <= '%s'", dbesc(NULL_DATE));
+ return $s[0]["total"];
+}
+
+/**
+ * @brief Returns the highest priority in the worker queue that isn't executed
+ *
+ * @return integer Number of active poller processes
+ */
+function poller_highest_priority() {
+ $s = q("SELECT `priority` FROM `workerqueue` WHERE `executed` <= '%s' ORDER BY `priority` LIMIT 1", dbesc(NULL_DATE));
+ return $s[0]["priority"];
+}
+
+/**
+ * @brief Returns if a process with the given priority is running
+ *
+ * @param integer $priority The priority that should be checked
+ *
+ * @return integer Is there a process running with that priority?
+ */
+function poller_process_with_priority_active($priority) {
+ $s = q("SELECT `id` FROM `workerqueue` WHERE `priority` <= %d AND `executed` > '%s' LIMIT 1",
+ intval($priority), dbesc(NULL_DATE));
+ return dbm::is_result($s);
}
/**
// Quit when in maintenance
if (Config::get('system', 'maintenance', true)) {
+ logger("Maintenance mode - quit process ".$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
$funcname = str_replace(".php", "", basename($argv[0]))."_run";
if (function_exists($funcname)) {
-
poller_exec_function($queue, $funcname, $argv);
-
dba::delete('workerqueue', array('id' => $queue["id"]));
} else {
logger("Function ".$funcname." does not exist");
// But preserve the old one for the worker
$old_process_id = $a->process_id;
$a->process_id = uniqid("wrk", true);
+ $a->queue = $queue;
$funcname($argv, $argc);
$a->process_id = $old_process_id;
+ unset($a->queue);
$duration = number_format(microtime(true) - $stamp, 3);
$o = "\nDatabase Read:\n";
foreach ($a->callstack["database"] AS $func => $time) {
$time = round($time, 3);
- if ($time > 0)
+ if ($time > 0) {
$o .= $func.": ".$time."\n";
+ }
}
}
if (isset($a->callstack["database_write"])) {
$o .= "\nDatabase Write:\n";
foreach ($a->callstack["database_write"] AS $func => $time) {
$time = round($time, 3);
- if ($time > 0)
+ if ($time > 0) {
$o .= $func.": ".$time."\n";
+ }
}
}
if (isset($a->callstack["network"])) {
$o .= "\nNetwork:\n";
foreach ($a->callstack["network"] AS $func => $time) {
$time = round($time, 3);
- if ($time > 0)
+ if ($time > 0) {
$o .= $func.": ".$time."\n";
+ }
}
}
} else {
if ($max == 0) {
// the maximum number of possible user connections can be a system variable
$r = q("SHOW VARIABLES WHERE `variable_name` = 'max_user_connections'");
- if ($r)
+ if (dbm::is_result($r)) {
$max = $r[0]["Value"];
-
+ }
// Or it can be granted. This overrides the system variable
$r = q("SHOW GRANTS");
- if ($r)
+ if (dbm::is_result($r)) {
foreach ($r AS $grants) {
$grant = array_pop($grants);
- if (stristr($grant, "GRANT USAGE ON"))
- if (preg_match("/WITH MAX_USER_CONNECTIONS (\d*)/", $grant, $match))
+ if (stristr($grant, "GRANT USAGE ON")) {
+ if (preg_match("/WITH MAX_USER_CONNECTIONS (\d*)/", $grant, $match)) {
$max = $match[1];
+ }
+ }
}
+ }
}
// If $max is set we will use the processlist to determine the current number of connections
// The processlist only shows entries of the current user
if ($max != 0) {
$r = q("SHOW PROCESSLIST");
- if (!dbm::is_result($r))
+ if (!dbm::is_result($r)) {
return false;
-
+ }
$used = count($r);
logger("Connection usage (user values): ".$used."/".$max, LOGGER_DEBUG);
// We will now check for the system values.
// This limit could be reached although the user limits are fine.
$r = q("SHOW VARIABLES WHERE `variable_name` = 'max_connections'");
- if (!$r)
+ if (!dbm::is_result($r)) {
return false;
-
+ }
$max = intval($r[0]["Value"]);
- if ($max == 0)
+ if ($max == 0) {
return false;
-
+ }
$r = q("SHOW STATUS WHERE `variable_name` = 'Threads_connected'");
- if (!$r)
+ if (!dbm::is_result($r)) {
return false;
-
+ }
$used = intval($r[0]["Value"]);
- if ($used == 0)
+ if ($used == 0) {
return false;
-
+ }
logger("Connection usage (system values): ".$used."/".$max, LOGGER_DEBUG);
$level = $used / $max * 100;
- if ($level < $maxlevel)
+ if ($level < $maxlevel) {
return false;
-
+ }
logger("Maximum level (".$level."%) of system connections reached: ".$used."/".$max);
return true;
}
/**
* @brief Checks if the number of active workers exceeds the given limits
*
+ * @param integer $entries The number of not executed entries in the worker queue
+ * @param integer $top_priority The highest not executed priority in the worker queue
+ * @param boolean $high_running Is a process with priority "$top_priority" running?
+ *
* @return bool Are there too much workers running?
*/
function poller_too_much_workers() {
$slope = $maxworkers / pow($maxsysload, $exponent);
$queues = ceil($slope * pow(max(0, $maxsysload - $load), $exponent));
- $s = q("SELECT COUNT(*) AS `total` FROM `workerqueue` WHERE `executed` <= '%s'", dbesc(NULL_DATE));
- $entries = $s[0]["total"];
+ if (Config::get('system', 'worker_debug')) {
+ // 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"];
+ }
+ 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` INNER JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid` WHERE `priority` = ?", $entry["priority"]);
+ if ($process = dba::fetch($processes)) {
+ $listitem[$entry["priority"]] = $entry["priority"].":".$process["running"]."/".$entry["entries"];
+ }
+ dba::close($processes);
+ }
+ dba::close($entries);
+ $processlist = ' ('.implode(', ', $listitem).')';
+ }
- if (Config::get("system", "worker_fastlane", false) AND ($queues > 0) AND ($entries > 0) AND ($active >= $queues)) {
- $s = q("SELECT `priority` FROM `workerqueue` WHERE `executed` <= '%s' ORDER BY `priority` LIMIT 1", dbesc(NULL_DATE));
- $top_priority = $s[0]["priority"];
+ $entries = poller_total_entries();
- $s = q("SELECT `id` FROM `workerqueue` WHERE `priority` <= %d AND `executed` > '%s' LIMIT 1",
- intval($top_priority), dbesc(NULL_DATE));
- $high_running = dbm::is_result($s);
+ if (Config::get("system", "worker_fastlane", false) && ($queues > 0) && ($entries > 0) && ($active >= $queues)) {
+ $top_priority = poller_highest_priority();
+ $high_running = poller_process_with_priority_active($top_priority);
- if (!$high_running AND ($top_priority > PRIORITY_UNDEFINED) AND ($top_priority < PRIORITY_NEGLIGIBLE)) {
+ if (!$high_running && ($top_priority > PRIORITY_UNDEFINED) && ($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."/".$maxqueues, LOGGER_DEBUG);
+ logger("Load: ".$load."/".$maxsysload." - processes: ".$active."/".$entries.$processlist." - maximum: ".$queues."/".$maxqueues, LOGGER_DEBUG);
// Are there fewer workers running as possible? Then fork a new one.
- if (!Config::get("system", "worker_dont_fork") AND ($queues > ($active + 1)) AND ($entries > 1)) {
+ if (!Config::get("system", "worker_dont_fork") && ($queues > ($active + 1)) && ($entries > 1)) {
logger("Active workers: ".$active."/".$queues." Fork a new worker.", LOGGER_DEBUG);
$args = array("include/poller.php", "no_cron");
$a = get_app();
}
}
- return($active >= $queues);
+ return $active >= $queues;
}
/**
function poller_active_workers() {
$workers = q("SELECT COUNT(*) AS `processes` FROM `process` WHERE `command` = 'poller.php'");
- return($workers[0]["processes"]);
+ return $workers[0]["processes"];
}
/**
INNER JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid`");
// No active processes at all? Fine
- if (!dbm::is_result($r))
- return(false);
-
+ if (!dbm::is_result($r)) {
+ return false;
+ }
$priorities = array();
- foreach ($r AS $line)
+ foreach ($r AS $line) {
$priorities[] = $line["priority"];
-
+ }
// Should not happen
- if (count($priorities) == 0)
- return(false);
-
+ if (count($priorities) == 0) {
+ return false;
+ }
$highest_priority = min($priorities);
// The highest process is already the slowest one?
// Then we quit
- if ($highest_priority == PRIORITY_NEGLIGIBLE)
- return(false);
-
+ if ($highest_priority == PRIORITY_NEGLIGIBLE) {
+ return false;
+ }
$high = 0;
- foreach ($priorities AS $priority)
- if ($priority == $highest_priority)
+ foreach ($priorities AS $priority) {
+ if ($priority == $highest_priority) {
++$high;
-
+ }
+ }
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)
+ if ($passing_slow) {
logger("Passing slower processes than priority ".$highest_priority, LOGGER_DEBUG);
-
- return($passing_slow);
+ }
+ return $passing_slow;
}
/**
- * @brief Returns the next worker process
+ * @brief Find and claim the next worker process for us
*
- * @return string SQL statement
+ * @return boolean Have we found something?
*/
-function poller_worker_process() {
-
- dba::transaction();
-
+function find_worker_processes() {
// Check if we should pass some low priority process
$highest_priority = 0;
+ $found = false;
if (poller_passing_slow($highest_priority)) {
// Are there waiting processes with a higher priority than the currently highest?
- $r = q("SELECT * FROM `workerqueue`
- WHERE `executed` <= '%s' AND `priority` < %d
- ORDER BY `priority`, `created` LIMIT 1",
- dbesc(NULL_DATE),
- intval($highest_priority));
- if (dbm::is_result($r)) {
- return $r;
+ $result = dba::p("UPDATE `workerqueue` SET `executed` = ?, `pid` = ?
+ WHERE `executed` <= ? AND `priority` < ?
+ ORDER BY `priority`, `created` LIMIT 5",
+ datetime_convert(), getmypid(), NULL_DATE, $highest_priority);
+ if (dbm::is_result($result)) {
+ $found = (dba::num_rows($result) > 0);
+ }
+ dba::close($result);
+
+ if (!$found) {
+ // Give slower processes some processing time
+ $result = dba::p("UPDATE `workerqueue` SET `executed` = ?, `pid` = ?
+ WHERE `executed` <= ? AND `priority` > ?
+ ORDER BY `priority`, `created` LIMIT 1",
+ datetime_convert(), getmypid(), NULL_DATE, $highest_priority);
+ if (dbm::is_result($result)) {
+ $found = (dba::num_rows($result) > 0);
+ }
+ dba::close($result);
}
- // Give slower processes some processing time
- $r = q("SELECT * FROM `workerqueue`
- WHERE `executed` <= '%s' AND `priority` > %d
- ORDER BY `priority`, `created` LIMIT 1",
- dbesc(NULL_DATE),
- intval($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)) {
- $r = q("SELECT * FROM `workerqueue` WHERE `executed` <= '%s' ORDER BY `priority`, `created` LIMIT 1", dbesc(NULL_DATE));
+ if (!$found) {
+ $result = dba::p("UPDATE `workerqueue` SET `executed` = ?, `pid` = ? WHERE `executed` <= ? ORDER BY `priority`, `created` LIMIT 5",
+ datetime_convert(), getmypid(), NULL_DATE);
+ if (dbm::is_result($result)) {
+ $found = (dba::num_rows($result) > 0);
+ }
+ dba::close($result);
+ }
+ return $found;
+}
+
+/**
+ * @brief Returns the next worker process
+ *
+ * @return string SQL statement
+ */
+function poller_worker_process() {
+
+ $stamp = (float)microtime(true);
+
+ $timeout = 10;
+ do {
+ $found = find_worker_processes();
+ } while (!$found && (poller_total_entries() > 0) && (--$timeout > 0));
+
+ logger('Duration: '.number_format(microtime(true) - $stamp, 3), LOGGER_DEBUG);
+
+ if ($found) {
+ $r = q("SELECT * FROM `workerqueue` WHERE `pid` = %d", intval(getmypid()));
}
return $r;
}
+/**
+ * @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();
+ Lock::remove('poller_worker');
+
killme();
}
projects / friendica.git / blobdiff