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 20:03:52

#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 Maxim Yegorushkin <maxim.yegorushkin@…>):

 With this patch boost::condition_variable performs better than std one in
 the benchmark:

 {{{
 consumers,(std-boost)/std,std,boost
 1,1.738797,17452356,17148895
 2,0.818735,26905168,26684886
 3,0.909335,58318561,57788250
 4,0.929148,45236280,44815968
 5,1.255012,54510018,53825911
 6,1.410902,63880220,62978933
 7,1.094065,72988694,72190150
 8,1.073388,82271239,81388149
 9,0.915663,91362805,90526230
 10,0.991684,100724122,99725257
 }}}

 (I also updated that spreadsheet on docs.google.com)

 Nicely done!

 In the patch condition_variable always has internal_mutex member, is it
 intended?

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7422#comment:29>
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