[Boost-bugs] [Boost C++ Libraries] #6976: Waiting on boost interprocess condition consumes 100% CPU on Windows

Subject: [Boost-bugs] [Boost C++ Libraries] #6976: Waiting on boost interprocess condition consumes 100% CPU on Windows
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-06-10 00:03:26

#6976: Waiting on boost interprocess condition consumes 100% CPU on Windows
------------------------------------------------+---------------------------
 Reporter:  tmf83 <tmf83@…>                     |       Owner:  igaztanaga  
     Type:  Bugs                                |      Status:  new         
Milestone:  To Be Determined                    |   Component:  interprocess
  Version:  Boost 1.49.0                        |    Severity:  Problem     
 Keywords:  interprocess condition cpu windows  |  
------------------------------------------------+---------------------------
 The problem arises when several threads of several processes waits on same
 condition. For example, we have application in which we create several
 threads with thread function like this:

 {{{
 while (_running)
 {
 boost::interprocess::scoped_lock<boost::interprocess::interprocess_mutex>
 lock ( _shm->mutex ) ; // _shm - shared memory
        _shm->condition.wait ( lock ) ; // condition is
 boost::interprocess::interprocess_condition
 }
 }}}

 In main function we simply create several threads, sleep for a some time
 and stop threads. If we create 4 threads and start 2 applications, or
 create 3 threads and start 3 applications, or create 2 threads and start 4
 applications then we get this problem. Its funny that the problem arising
 depends on quantity of threads and processes which we start.
 This is tested on windows 7, windows xp. No problem on Linux system
 (Debian squeeze)

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/6976>
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