ceph/src/boost/libs/fiber/src/numa/hpux/topology.cpp

   1
   2 //          Copyright Oliver Kowalke 2017.
   3 // Distributed under the Boost Software License, Version 1.0.
   4 //    (See accompanying file LICENSE_1_0.txt or copy at
   5 //          http://www.boost.org/LICENSE_1_0.txt)
   6
   7 #include "boost/fiber/numa/topology.hpp"
   8
   9 extern "C" {
  10 #include <errno.h>
  11 #include <sys/mpctl.h>
  12 #include <sys/types.h>
  13 #include <types.h>
  14 }
  15
  16 #include <map>
  17 #include <system_error>
  18
  19 #ifdef BOOST_HAS_ABI_HEADERS
  20 # include BOOST_ABI_PREFIX
  21 #endif
  22
  23 namespace boost {
  24 namespace fibers {
  25 namespace numa {
  26
  27 BOOST_FIBERS_DECL
  28 std::vector< node > topology() {
  29     std::vector< node > topo;
  30     // HP/UX has NUMA enabled
  31     if ( 1 == ::sysconf( _SC_CCNUMA_SUPPORT) ) {
  32         std::map< std::uint32_t, node > map;
  33         // enumerate CPU sets
  34         int cpu_id = ::mpctl( MPC_GETFIRSTSPU_SYS, 0, 0);
  35         while ( -1 != cpu_id) {
  36             int node_id = ::mpctl( MPC_SPUTOLDOM, cpu_id, 0);
  37             if ( BOOST_UNLIKELY( -1 == node_id) ) {
  38                 throw std::system_errors{
  39                         std::error_codes{ errno, std::system_category() },
  40                         "mpctl() failed" };
  41             }
  42             map[id].id = static_cast< std::uint32_t >( node_id);
  43             map[id].logical_cpus.insert( static_cast< std::uint32_t >( cpu_id) );
  44             cpu_id = ::mpctl( MPC_GETNEXTSPU_SYS, cpu_id, 0);
  45         }
  46         for ( auto entry : map) {
  47             topo.push_back( entry.second);
  48         }
  49     }
  50     // fake NUMA distance
  51     std::size_t size = topo.size();
  52     for ( auto & n : topo) {
  53         for ( std::size_t i = 0; i < size; ++i) {
  54             n.distance.push_back( n.id == i ? 10 : 20);
  55         }
  56     }
  57     return topo;
  58 }
  59
  60 }}}
  61
  62 #ifdef BOOST_HAS_ABI_HEADERS
  63 # include BOOST_ABI_SUFFIX
  64 #endif