Re: [Boost-bugs] [Boost C++ Libraries] #7422: Provide a condition variable with zero-overhead performance penality

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #7422: Provide a condition variable with zero-overhead performance penality
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-12-18 16:24:43

#7422: Provide a condition variable with zero-overhead performance penality
------------------------------------------+---------------------------------
  Reporter:  maxim.yegorushkin@…          |       Owner:  viboes            
      Type:  Feature Requests             |      Status:  assigned          
 Milestone:  To Be Determined             |   Component:  thread            
   Version:  Boost 1.51.0                 |    Severity:  Regression        
Resolution:                               |    Keywords:  condition_variable
------------------------------------------+---------------------------------

Comment (by viboes):

 Hi,

 I have reached to improve the performances by removing the internal_mutex
 (see the attached patch). Here they are the results for clang-3.2:

 {{{
 consumers,(std-boost)/std,std,boost
 1,3.163455,442899995,428889051
 2,0.416842,736341309,733271929
 3,1.203291,941092107,929768034
 4,-0.029287,1217358160,1217714683
 5,0.896356,1422949963,1410195269
 6,0.315211,1734865379,1729396900
 7,1.033687,1882941043,1863477335
 8,-0.355615,2217150537,2225035057
 9,1.051769,2378341849,2353327192
 10,0.500550,2721524297,2707901713
 }}}

 I suspect that I have no compiled the library libc++ in release mode :(

 Please, could you give a try to this patch?

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7422#comment:28>
Boost C++ Libraries <http://www.boost.org/>
Boost provides free peer-reviewed portable C++ source libraries.