Bug #65596 [Opn->Wfx]: usleep prevents script timeout

Edit report at https://bugs.php.net/bug.php?id=65596&edit=1 ID: 65596 Updated by: ab@php.net Reported by: ukrtelecom at gmail dot com Summary: usleep prevents script timeout -Status: Open +Status: Wont fix Type: Bug Package: *General Issues Operating System: Linux PHP Version: 5.4Git-2013-08-30 (snap) Block user comment: N Private report: N New Comment: This is unsolvable in PHP, sleep is a system call so it will suspend the execution . It can be only interrupted by a signal which can't be thrown from PHP because the execution is suspended :) Previous Comments: ------------------------------------------------------------------------ [2013-08-30 15:47:44] ukrtelecom at gmail dot com Description: ------------ Usleeped time does not count in total timeout time. Commenting out line 11 "usleep(10)" in the test script results with expected Fatal timeout in 2 seconds. Enabling line 11 "usleep(10)" makes script exit by condition in 50 seconds. Increasing waiting time to 100 seconds in line 2 results with timeout Fatal error in 60-70 sec. PHP 5.4.20-dev (cli) (built: Aug 30 2013 14:18:16) Copyright (c) 1997-2013 The PHP Group Zend Engine v2.4.0, Copyright (c) 1998-2013 Zend Technologies ./configure --disable-libxml --disable-xml --disable-simplexml --disable- xmlreader --disable-xmlwriter --disable-dom --without-pear OS Ubuntu 12.04 LTS Linux precise64 3.2.0-23-generic #36-Ubuntu SMP Tue Apr 10 20:39:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux Test script: --------------- <?php $wait = 50; echo ini_get('max_execution_time'); set_time_limit(2); $ts = time(); while(true) { // usleep for 10 microseconds usleep(10); if ((time()- $ts) > $wait) { echo time() -$ts; echo "\n\nFailed! " . ini_get('max_execution_time') . "\n"; break; } } Expected result: ---------------- 0 Fatal error: Maximum execution time of 2 seconds exceeded in /home/vagrant/t.php on line 12 Actual result: -------------- #with wait time 50 sec: $ date; php t.php ; date Fri Aug 30 15:40:54 UTC 2013 0 51 Failed! 2 Fri Aug 30 15:41:45 UTC 2013 #with wait time 100 sec: $ date; php t.php ; date Fri Aug 30 15:35:45 UTC 2013 0 Fatal error: Maximum execution time of 2 seconds exceeded in /home/vagrant/t.php on line 12 Fri Aug 30 15:36:40 UTC 2013 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=65596&edit=1