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Some code beautification

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Michael 2017-06-04 20:03:37 +00:00
parent 2d229ad856
commit fb72fc77f5
1 changed files with 89 additions and 71 deletions
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160
include/poller.php
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@ -7,9 +7,9 @@ use Friendica\Util\Lock;
if (!file_exists("boot.php") AND (sizeof($_SERVER["argv"]) != 0)) { if (!file_exists("boot.php") AND (sizeof($_SERVER["argv"]) != 0)) {
$directory = dirname($_SERVER["argv"][0]); $directory = dirname($_SERVER["argv"][0]);
if (substr($directory, 0, 1) != "/") if (substr($directory, 0, 1) != "/") {
$directory = $_SERVER["PWD"]."/".$directory; $directory = $_SERVER["PWD"]."/".$directory;
}
$directory = realpath($directory."/.."); $directory = realpath($directory."/..");
chdir($directory); chdir($directory);
@ -38,53 +38,58 @@ function poller_run($argv, $argc){
load_hooks(); load_hooks();
if (($argc <= 1) OR ($argv[1] != "no_cron")) { // At first check the maximum load. We shouldn't continue with a high load
poller_run_cron();
}
$a->start_process();
if ($a->min_memory_reached()) {
logger('Pre check: Memory limit reached, quitting.', LOGGER_DEBUG);
return;
}
if (poller_max_connections_reached()) {
logger('Pre check: maximum connections reached, quitting.', LOGGER_DEBUG);
return;
}
if ($a->maxload_reached()) { if ($a->maxload_reached()) {
logger('Pre check: maximum load reached, quitting.', LOGGER_DEBUG); logger('Pre check: maximum load reached, quitting.', LOGGER_DEBUG);
return; return;
} }
if ($a->max_processes_reached()) { // We now start the process. This is done after the load check since this could increase the load.
logger('Pre check: maximum processes reached, quitting.', LOGGER_DEBUG); $a->start_process();
return;
}
// Checking the number of workers // At first we check the number of workers and quit if there are too much of them
// This is done at the top to avoid that too much code is executed without a need to do so,
// since the poller mostly quits here.
if (poller_too_much_workers()) { if (poller_too_much_workers()) {
poller_kill_stale_workers(); poller_kill_stale_workers();
logger('Pre check: Active worker limit reached, quitting.', LOGGER_DEBUG); logger('Pre check: Active worker limit reached, quitting.', LOGGER_DEBUG);
return; return;
} }
// Do we have too few memory?
if ($a->min_memory_reached()) {
logger('Pre check: Memory limit reached, quitting.', LOGGER_DEBUG);
return;
}
// 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 ($a->max_processes_reached()) {
logger('Pre check: maximum processes reached, quitting.', LOGGER_DEBUG);
return;
}
// Now we start additional cron processes if we should do so
if (($argc <= 1) OR ($argv[1] != "no_cron")) {
poller_run_cron();
}
$starttime = time(); $starttime = time();
// We fetch the next queue entry that is about to be executed
while ($r = poller_worker_process()) { while ($r = poller_worker_process()) {
// If we got that queue entry we claim it for us
if (!poller_claim_process($r[0])) { if (!poller_claim_process($r[0])) {
continue; continue;
} }
// Check free memory // To avoid the quitting of multiple pollers we serialize the next check
if ($a->min_memory_reached()) {
logger('Memory limit reached, quitting.', LOGGER_DEBUG);
return;
}
if (!Lock::set('poller_worker')) { if (!Lock::set('poller_worker')) {
logger('Cannot get a lock, retrying.', LOGGER_DEBUG); logger('Cannot get a lock, retrying.', LOGGER_DEBUG);
poller_unclaim_process(); poller_unclaim_process();
@ -99,6 +104,13 @@ function poller_run($argv, $argc){
Lock::remove('poller_worker'); Lock::remove('poller_worker');
// Check free memory
if ($a->min_memory_reached()) {
logger('Memory limit reached, quitting.', LOGGER_DEBUG);
return;
}
// finally the work will be done
if (!poller_execute($r[0])) { if (!poller_execute($r[0])) {
logger('Process execution failed, quitting.', LOGGER_DEBUG); logger('Process execution failed, quitting.', LOGGER_DEBUG);
return; return;
@ -160,7 +172,6 @@ function poller_execute($queue) {
$funcname = str_replace(".php", "", basename($argv[0]))."_run"; $funcname = str_replace(".php", "", basename($argv[0]))."_run";
if (function_exists($funcname)) { if (function_exists($funcname)) {
poller_exec_function($queue, $funcname, $argv); poller_exec_function($queue, $funcname, $argv);
dba::delete('workerqueue', array('id' => $queue["id"])); dba::delete('workerqueue', array('id' => $queue["id"]));
} else { } else {
@ -236,24 +247,27 @@ function poller_exec_function($queue, $funcname, $argv) {
$o = "\nDatabase Read:\n"; $o = "\nDatabase Read:\n";
foreach ($a->callstack["database"] AS $func => $time) { foreach ($a->callstack["database"] AS $func => $time) {
$time = round($time, 3); $time = round($time, 3);
if ($time > 0) if ($time > 0) {
$o .= $func.": ".$time."\n"; $o .= $func.": ".$time."\n";
}
} }
} }
if (isset($a->callstack["database_write"])) { if (isset($a->callstack["database_write"])) {
$o .= "\nDatabase Write:\n"; $o .= "\nDatabase Write:\n";
foreach ($a->callstack["database_write"] AS $func => $time) { foreach ($a->callstack["database_write"] AS $func => $time) {
$time = round($time, 3); $time = round($time, 3);
if ($time > 0) if ($time > 0) {
$o .= $func.": ".$time."\n"; $o .= $func.": ".$time."\n";
}
} }
} }
if (isset($a->callstack["network"])) { if (isset($a->callstack["network"])) {
$o .= "\nNetwork:\n"; $o .= "\nNetwork:\n";
foreach ($a->callstack["network"] AS $func => $time) { foreach ($a->callstack["network"] AS $func => $time) {
$time = round($time, 3); $time = round($time, 3);
if ($time > 0) if ($time > 0) {
$o .= $func.": ".$time."\n"; $o .= $func.": ".$time."\n";
}
} }
} }
} else { } else {
@ -294,27 +308,30 @@ function poller_max_connections_reached() {
if ($max == 0) { if ($max == 0) {
// the maximum number of possible user connections can be a system variable // the maximum number of possible user connections can be a system variable
$r = q("SHOW VARIABLES WHERE `variable_name` = 'max_user_connections'"); $r = q("SHOW VARIABLES WHERE `variable_name` = 'max_user_connections'");
if ($r) if (dbm::is_result($r)) {
$max = $r[0]["Value"]; $max = $r[0]["Value"];
}
// Or it can be granted. This overrides the system variable // Or it can be granted. This overrides the system variable
$r = q("SHOW GRANTS"); $r = q("SHOW GRANTS");
if ($r) if (dbm::is_result($r)) {
foreach ($r AS $grants) { foreach ($r AS $grants) {
$grant = array_pop($grants); $grant = array_pop($grants);
if (stristr($grant, "GRANT USAGE ON")) if (stristr($grant, "GRANT USAGE ON")) {
if (preg_match("/WITH MAX_USER_CONNECTIONS (\d*)/", $grant, $match)) if (preg_match("/WITH MAX_USER_CONNECTIONS (\d*)/", $grant, $match)) {
$max = $match[1]; $max = $match[1];
}
}
} }
}
} }
// If $max is set we will use the processlist to determine the current number of connections // If $max is set we will use the processlist to determine the current number of connections
// The processlist only shows entries of the current user // The processlist only shows entries of the current user
if ($max != 0) { if ($max != 0) {
$r = q("SHOW PROCESSLIST"); $r = q("SHOW PROCESSLIST");
if (!dbm::is_result($r)) if (!dbm::is_result($r)) {
return false; return false;
}
$used = count($r); $used = count($r);
logger("Connection usage (user values): ".$used."/".$max, LOGGER_DEBUG); logger("Connection usage (user values): ".$used."/".$max, LOGGER_DEBUG);
@ -330,28 +347,28 @@ function poller_max_connections_reached() {
// We will now check for the system values. // We will now check for the system values.
// This limit could be reached although the user limits are fine. // This limit could be reached although the user limits are fine.
$r = q("SHOW VARIABLES WHERE `variable_name` = 'max_connections'"); $r = q("SHOW VARIABLES WHERE `variable_name` = 'max_connections'");
if (!$r) if (!dbm::is_result($r)) {
return false; return false;
}
$max = intval($r[0]["Value"]); $max = intval($r[0]["Value"]);
if ($max == 0) if ($max == 0) {
return false; return false;
}
$r = q("SHOW STATUS WHERE `variable_name` = 'Threads_connected'"); $r = q("SHOW STATUS WHERE `variable_name` = 'Threads_connected'");
if (!$r) if (!dbm::is_result($r)) {
return false; return false;
}
$used = intval($r[0]["Value"]); $used = intval($r[0]["Value"]);
if ($used == 0) if ($used == 0) {
return false; return false;
}
logger("Connection usage (system values): ".$used."/".$max, LOGGER_DEBUG); logger("Connection usage (system values): ".$used."/".$max, LOGGER_DEBUG);
$level = $used / $max * 100; $level = $used / $max * 100;
if ($level < $maxlevel) if ($level < $maxlevel) {
return false; return false;
}
logger("Maximum level (".$level."%) of system connections reached: ".$used."/".$max); logger("Maximum level (".$level."%) of system connections reached: ".$used."/".$max);
return true; return true;
} }
@ -376,9 +393,9 @@ function poller_kill_stale_workers() {
// Kill long running processes // Kill long running processes
// Check if the priority is in a valid range // Check if the priority is in a valid range
if (!in_array($pid["priority"], array(PRIORITY_CRITICAL, PRIORITY_HIGH, PRIORITY_MEDIUM, PRIORITY_LOW, PRIORITY_NEGLIGIBLE))) if (!in_array($pid["priority"], array(PRIORITY_CRITICAL, PRIORITY_HIGH, PRIORITY_MEDIUM, PRIORITY_LOW, PRIORITY_NEGLIGIBLE))) {
$pid["priority"] = PRIORITY_MEDIUM; $pid["priority"] = PRIORITY_MEDIUM;
}
// Define the maximum durations // 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_defaults = array(PRIORITY_CRITICAL => 360, PRIORITY_HIGH => 10, PRIORITY_MEDIUM => 60, PRIORITY_LOW => 180, PRIORITY_NEGLIGIBLE => 360);
$max_duration = $max_duration_defaults[$pid["priority"]]; $max_duration = $max_duration_defaults[$pid["priority"]];
@ -480,7 +497,7 @@ function poller_too_much_workers() {
} }
} }
return($active >= $queues); return $active >= $queues;
} }
/** /**
@ -491,7 +508,7 @@ function poller_too_much_workers() {
function poller_active_workers() { function poller_active_workers() {
$workers = q("SELECT COUNT(*) AS `processes` FROM `process` WHERE `command` = 'poller.php'"); $workers = q("SELECT COUNT(*) AS `processes` FROM `process` WHERE `command` = 'poller.php'");
return($workers[0]["processes"]); return $workers[0]["processes"];
} }
/** /**
@ -512,36 +529,37 @@ function poller_passing_slow(&$highest_priority) {
INNER JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid`"); INNER JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid`");
// No active processes at all? Fine // No active processes at all? Fine
if (!dbm::is_result($r)) if (!dbm::is_result($r)) {
return(false); return false;
}
$priorities = array(); $priorities = array();
foreach ($r AS $line) foreach ($r AS $line) {
$priorities[] = $line["priority"]; $priorities[] = $line["priority"];
}
// Should not happen // Should not happen
if (count($priorities) == 0) if (count($priorities) == 0) {
return(false); return false;
}
$highest_priority = min($priorities); $highest_priority = min($priorities);
// The highest process is already the slowest one? // The highest process is already the slowest one?
// Then we quit // Then we quit
if ($highest_priority == PRIORITY_NEGLIGIBLE) if ($highest_priority == PRIORITY_NEGLIGIBLE) {
return(false); return false;
}
$high = 0; $high = 0;
foreach ($priorities AS $priority) foreach ($priorities AS $priority) {
if ($priority == $highest_priority) if ($priority == $highest_priority) {
++$high; ++$high;
}
}
logger("Highest priority: ".$highest_priority." Total processes: ".count($priorities)." Count high priority processes: ".$high, LOGGER_DEBUG); logger("Highest priority: ".$highest_priority." Total processes: ".count($priorities)." Count high priority processes: ".$high, LOGGER_DEBUG);
$passing_slow = (($high/count($priorities)) > (2/3)); $passing_slow = (($high/count($priorities)) > (2/3));
if ($passing_slow) if ($passing_slow) {
logger("Passing slower processes than priority ".$highest_priority, LOGGER_DEBUG); logger("Passing slower processes than priority ".$highest_priority, LOGGER_DEBUG);
}
return($passing_slow); return $passing_slow;
} }
/** /**