Re: [Boost-bugs] [Boost C++ Libraries] #10155: thread::physical_concurrency() always returns 0 on PowerPC

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #10155: thread::physical_concurrency() always returns 0 on PowerPC
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-06-30 19:15:29

#10155: thread::physical_concurrency() always returns 0 on PowerPC
-------------------------------------+-------------------------------------
  Reporter:  Harris Munir            |      Owner:  viboes
  <hamunir@…>                        |     Status:  assigned
      Type:  Bugs                    |  Component:  thread
 Milestone:  To Be Determined        |   Severity:  Problem
   Version:  Boost Release Branch    |   Keywords:  thread, threads,
Resolution:                          |  pthread, powerpc, ppc, power
-------------------------------------+-------------------------------------

Comment (by Harris Munir <hamunir@…>):

 Replying to [comment:1 viboes]:
 > Hi,
 >
 > how to be sure that the check for {{{__powerpc__}}} is the good one?
 > Do all the Linux PowerPC behave the same?

 Hello!

 All Linux PowerPC machines I have access to seem to behave this way.
 However, perhaps a safer solution would be to fall back to
 hardware_concurrency() when no "physical id" or "core id" entries are
 found in /proc/cpuinfo. I would implement this by returning the result of
 hardware_concurrency() instead of 0 within this block:

 https://github.com/boostorg/thread/blob/master/src/pthread/thread.cpp#L575-618


 If you think this is a good idea I would be happy to make a new pull
 request.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/10155#comment:2>
Boost C++ Libraries <http://www.boost.org/>
Boost provides free peer-reviewed portable C++ source libraries.