#28398 [NEW]: Random pauses in execution

From: bheam at online dot no Operating system: linux fedora core 1 PHP version: 4.3.6 PHP Bug Type: Performance problem Bug description: Random pauses in execution Description: ------------ I'm developing a publishing tool with php, but am having trouble after i switched server. Old configuration: P3 800mhz 512mb ram New configuration p4 2.8 x 2 512mb ram s-ata disks, raid both systems run: php-4.3.3 apache-2.0.47 mysql-4.0.13 (not relevant) also upgraded to php-4.3.6 on p4 without any change. On the new system, the php code seems to be pausing at random places (have been inserting error_log calls at certain points in code) for example it suddenly spent 4 seconds between 2 error_log that only had a echo() command in between. I made a simple loop that echo("."), and it's smooth on the p3, but it's choppy and pauses every now and then on the 2xP4. i also made a similar program in c++ and it runs smooth (to prove it's not network) i've executed the .php with php -q, proving it's not apache. Reproduce code: --------------- for ($cnt = 0; $cnt < 30000; $cnt++) { for ($ca = 0;$ca < 100; $ca++) { $a = $a * 3; $a = $a + 1; $a = $a / 3; } echo("."); } -- Edit bug report at http://bugs.php.net/?id=28398&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=28398&r=trysnapshot4 Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=28398&r=trysnapshot5 Fixed in CVS: http://bugs.php.net/fix.php?id=28398&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=28398&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=28398&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=28398&r=needscript Try newer version: http://bugs.php.net/fix.php?id=28398&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=28398&r=support Expected behavior: http://bugs.php.net/fix.php?id=28398&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=28398&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=28398&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=28398&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=28398&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=28398&r=dst IIS Stability: http://bugs.php.net/fix.php?id=28398&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=28398&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=28398&r=float