#36479 [Asn->Fbk]: fread using 99% CPU in Windows with SSL Connection

ID: 36479 Updated by: jani@php.net Reported By: joel dot washburn at gmail dot com -Status: Assigned +Status: Feedback Bug Type: Streams related Operating System: Windows (Any) PHP Version: 5.1.3-dev Assigned To: pollita New Comment: Please try using this CVS snapshot: http://snaps.php.net/php5.2-latest.tar.gz For Windows (zip): http://snaps.php.net/win32/php5.2-win32-latest.zip For Windows (installer): http://snaps.php.net/win32/php5.2-win32-installer-latest.msi There were some fixes in the related files, please try it out. Previous Comments: ------------------------------------------------------------------------ [2006-03-24 00:40:31] joel dot washburn at gmail dot com Any progress on this issue? ------------------------------------------------------------------------ [2006-02-23 20:59:01] tony2001@php.net Sara, could you take a look at it? ------------------------------------------------------------------------ [2006-02-23 20:51:37] joel dot washburn at gmail dot com The issue was not resolved with 5.1.3-dev. ------------------------------------------------------------------------ [2006-02-22 08:31:57] tony2001@php.net Please try using this CVS snapshot: http://snaps.php.net/php5.1-latest.tar.gz For Windows: http://snaps.php.net/win32/php5.1-win32-latest.zip ------------------------------------------------------------------------ [2006-02-21 18:03:09] joel dot washburn at gmail dot com Description: ------------ php.exe uses 99% CPU while polling SSL sockets for data. I can reproduce this issue in IIS and Apache using php5isapi.dll and php5apache2.dll. This is a nightmare for php scripts using third party API calls via SSL sockets. If the API call takes a few seconds to run, the CPU is maxed out waiting on a response. This is not an issue on linux systems. This is not an issue on Windows using clean sockets (only SSL). Reproduce code: --------------- Below is a simple way to reproduce the problem with fgets(): Create two files, one (timer.php) has to be accessable from the web (HTTP and HTTPS) and the other can be ran from the command prompt (pingtimer.php). When you run pingtimer.php using SSL, php.exe will stick at 99% CPU in Task Manager. When you run it using clean sockets, its idle while waiting for a response. timer.php : <?php sleep(10); print "<html><body>10 sec. are up!</body></html>"; ?> pingtimer.php: <?php //$sock = fsockopen("localhost", 80); $sock = fsockopen("ssl://localhost", 443); $query = "GET /timer.php HTTP/1.1\r\n"; $query .= "Host: localhost\r\n"; $query .= "Connection: Close\r\n\r\n"; fwrite($sock, $query); while (!feof($sock)) { echo fgets($sock, 128); } fclose($sock); ?> Expected result: ---------------- CPU usage should be very little or zero while waiting for a response. Actual result: -------------- 99% CPU usage in Windows Task Manager from php.exe while waiting on a response. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=36479&edit=1