[Boost-bugs] [Boost C++ Libraries] #13130: BOOST_LOCKFREE_CACHELINE_BYTES value is incorrect on s390x

Subject: [Boost-bugs] [Boost C++ Libraries] #13130: BOOST_LOCKFREE_CACHELINE_BYTES value is incorrect on s390x
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2017-07-21 16:40:28

#13130: BOOST_LOCKFREE_CACHELINE_BYTES value is incorrect on s390x
------------------------------+--------------------------
 Reporter:  mike.munday@…     |      Owner:  timblechmann
     Type:  Bugs              |     Status:  new
Milestone:  To Be Determined  |  Component:  lockfree
  Version:  Boost 1.63.0      |   Severity:  Optimization
 Keywords:                    |
------------------------------+--------------------------
 The file include/boost/lockfree/detail/prefix.hpp contains the following
 code snippet:

 {{{
 // PowerPC caches support 128-byte cache lines.
 #if defined(powerpc) || defined(__powerpc__) || defined(__ppc__)
     #define BOOST_LOCKFREE_CACHELINE_BYTES 128
 #else
     #define BOOST_LOCKFREE_CACHELINE_BYTES 64
 #endif
 }}}

 This sets the cache line size on s390x to 64 bytes. This is incorrect, the
 correct size is 256 bytes. To fix we just need to add an extra #elif
 checking for the __s390__/ __s390x__ compiler-defined macros.

-- 
Ticket URL: <https://svn.boost.org/trac10/boost/ticket/13130>
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