[PHP-BUG] Bug #71166 [NEW]: Wrong output of GC statistics

[email protected] ("y dot uchiyama dot 1015 at gmail dot com")
Newsgroups php.bugs
Message-ID <[email protected]>
From:             y dot uchiyama dot 1015 at gmail dot com
Operating system: Any
PHP version:      7.0.1
Package:          Scripting Engine problem
Bug Type:         Bug
Bug description:Wrong output of GC statistics

Description:
------------
PHP 7 outputs wrong GC stats when compiled with -DGC_BENCH=1, because
root_buf_length is not decreased when cyclic garbages are collected on
GC.


Test script:
---------------
./sapi/cli/php </tmp/example1.php

where example1.php is shown at the following
http://www.php.net/manual/en/features.gc.performance-considerations.php


Expected result:
----------------
Root buffer length/peak should be <= 10000.

Actual result:
--------------
GC Statistics
-------------
Runs:               10
Collected:          99999
Root buffer length: 100001
Root buffer peak:   100006


-- 
Edit bug report at https://bugs.php.net/bug.php?id=71166&edit=1
-- 
Try a snapshot (PHP 5.4):   https://bugs.php.net/fix.php?id=71166&r=trysnapshot54
Try a snapshot (PHP 5.5):   https://bugs.php.net/fix.php?id=71166&r=trysnapshot55
Try a snapshot (trunk):     https://bugs.php.net/fix.php?id=71166&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=71166&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=71166&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=71166&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=71166&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=71166&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=71166&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=71166&r=notwrong
Not enough info:            https://bugs.php.net/fix.php?id=71166&r=notenoughinfo
Submitted twice:            https://bugs.php.net/fix.php?id=71166&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=71166&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=71166&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=71166&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=71166&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=71166&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=71166&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=71166&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=71166&r=mysqlcfg
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