Makes the linear load calculation optional

doc/htconfig.md

@@ -94,6 +94,7 @@ Example: To set the automatic database cleanup process add this line to your .ht
 * **throttle_limit_month** - Maximum number of posts that a user can send per month with the API.
 * **wall-to-wall_share** (Boolean) - Displays forwarded posts like "wall-to-wall" posts.
 * **worker_cooldown** - Cooldown time after each worker function call. Default value is 0 seconds.
+* **worker_linear_load** (Boolean) - Enables the linear calculation of maximum queues.
 * **xrd_timeout** - Timeout for fetching the XRD links. Default value is 20 seconds.
 
 ## experimental ##

src/Core/Worker.php

@@ -624,6 +624,12 @@ class Worker
 		$load = current_load();
 		if ($load) {
 			$maxsysload = intval(Config::get("system", "maxloadavg", 50));
+
+			if (Config::get('system', 'worker_linear_load', false)) {
+				/* The linear load calculation works fine if there is a low
+				 * number of maximum queues and a high load base level.
+				 * This can be present at shared hosters.
+				*/
 				$tinyload = 1;
 
 				if ($load > $maxsysload) {
@@ -635,6 +641,18 @@ class Worker
 					$target = $slope * ($maxqueues - 1);
 					$queues = intval(ceil($target));
 				}
+			} else {
+				/* The exponentional load calculation respects the load behaviour
+				 * of Linux systems with regular hardware that normally idles
+				 * with load values near 0.
+				*/
+				$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));
+			}
 
 			$processlist = '';