ID: 51168 Updated by: f...@php.net Reported By: kontakt at beberlei dot de Status: Bogus Bug Type: Unknown/Other Function Operating System: Linux/Ubuntu PHP Version: 5.3.1 New Comment:
Uhm, original bug seemed to be MacOS X only - now this reads Linux/Ubuntu - further testing needed I think. Previous Comments: ------------------------------------------------------------------------ [2010-02-28 16:46:51] j...@php.net Ok. ------------------------------------------------------------------------ [2010-02-27 16:49:35] kontakt at beberlei dot de Sorry it seems this is a duplicate of http://bugs.php.net/bug.php?id=49700 ------------------------------------------------------------------------ [2010-02-27 16:45:34] kontakt at beberlei dot de Description: ------------ When one of the participants of a cyclic reference holds a reference to a DateTime instance, the GC seems to be unable to do its job. NOTE: Even without a DateTime reference memory keeps increasing slowly but steadily. This is not the case as soon as either $a->b = $b or $b->a = $a is commented out, i.e. the cyclic reference is removed. So even though the GC seems to work almost perfectly (without a DateTime reference), a small leak remains. The leakage also occurs with PDO, however not with other php internal objects. Reproduce code: --------------- class A { public $b; public $ref; function __construct() { $this->ref = new DateTime; // "large" leak. comment out for small leak. } } class B { public $a; } for ($i=1; $i<=200000; ++$i) { $a = new A; $b = new B; $a->b = $b; // comment out to avoid any leakage, with or without DateTime, doesnt matter. $b->a = $a; // comment out to avoid any leakage, with or without DateTime, doesnt matter. if ($i % 10000 == 0) { gc_collect_cycles(); printf('----- Memory usage after %d iterations: %2.2f MB' .PHP_EOL, $i, memory_get_usage() / 1024 / 1024); } } Expected result: ---------------- ----- Memory usage after 10000 iterations: 0.79 MB ----- Memory usage after 20000 iterations: 0.79 MB ----- Memory usage after 30000 iterations: 0.79 MB ----- Memory usage after 40000 iterations: 0.79 MB ----- Memory usage after 50000 iterations: 0.79 MB ----- Memory usage after 60000 iterations: 0.79 MB ----- Memory usage after 70000 iterations: 0.79 MB ----- Memory usage after 80000 iterations: 0.79 MB ----- Memory usage after 90000 iterations: 0.79 MB ----- Memory usage after 100000 iterations: 0.79 MB Actual result: -------------- ----- Memory usage after 10000 iterations: 4.53 MB ----- Memory usage after 20000 iterations: 8.38 MB ----- Memory usage after 30000 iterations: 12.15 MB ----- Memory usage after 40000 iterations: 15.90 MB ----- Memory usage after 50000 iterations: 19.65 MB ----- Memory usage after 60000 iterations: 23.40 MB ----- Memory usage after 70000 iterations: 27.15 MB ----- Memory usage after 80000 iterations: 30.90 MB ----- Memory usage after 90000 iterations: 34.65 MB ----- Memory usage after 100000 iterations: 38.41 MB ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=51168&edit=1
