https://bugzilla.wikimedia.org/show_bug.cgi?id=70227
Bug ID: 70227
Summary: ParserOutput::getTimes and Profiler::getTime return
wrong results in HHVM
Product: MediaWiki
Version: unspecified
Hardware: All
URL: https://github.com/facebook/hhvm/pull/3632
OS: All
Status: NEW
Keywords: hiphop
Severity: normal
Priority: Unprioritized
Component: General/Unknown
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected]
Web browser: ---
Mobile Platform: ---
The PHP function getrusage() invokes the system call of the same name with
RUSAGE_SELF, which requests usage information for the calling process. Callers
of getrusage() in MediaWiki assume the PHP process is not shared by multiple
requests, and that the resource usage measured by RUSAGE_SELF is thus
attributable to the current request. These assumptions are false under HHVM.
Unfortunately, the getrusage() PHP function currently does not allow callers to
request RUSAGE_THREAD info. I submitted a pull-request to HHVM to add this
feature: <https://github.com/facebook/hhvm/pull/3632>. We need to update
ParserOutput::getTimes and Profiler::getTime once it is merged.
The other caller of getrusage() is a benchmarkParse.php. It doesn't need to be
fixed, because it's a standalone maintenance script.
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