From: "sax (Eric Saxby)" <sax@...>
Date: 2013-08-22T02:05:44+09:00
Subject: [ruby-core:56772] [ruby-trunk - Bug #8805] Ruby GC::Profiler	returns incorrect info on Solaris (and relatives)


Issue #8805 has been updated by sax (Eric Saxby).


Fantastic! I've rolled out this patch to some SmartOS hosts this morning and it fixes the GC::Profiler total_time reporting.

Thank you so much!
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Bug #8805: Ruby GC::Profiler returns incorrect info on Solaris (and relatives)
https://bugs.ruby-lang.org/issues/8805#change-41314

Author: sax (Eric Saxby)
Status: Open
Priority: Normal
Assignee: 
Category: core
Target version: 
ruby -v: ruby 2.0.0p247 (2013-06-27 revision 41674) [x86_64-solaris2.11]
Backport: 1.9.3: DONTNEED, 2.0.0: REQUIRED


We use SmartOS as our deployment platform, and noticed when attempting to roll out Ruby 2.0.0-p247 to some SmartOS hosts that garbage collection info is broken with integrations such as New Relic. Investigating further, we found that GC::Profiler.total_time always returns 0.0.

>> GC::Profiler.enable
=> nil
>> GC.start
=> nil
>> GC::Profiler.total_time
=> 0.0

It may be related to this issue: https://bugs.ruby-lang.org/issues/7500 where the mechanism by which the profiler gets timestamps from the OS.


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