ceph/src/boost/libs/fiber/src/numa/freebsd/pin_thread.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/pin_thread.hpp"
   8
   9 extern "C" {
  10 #include <errno.h>
  11 #include <sys/param.h>
  12 #include <sys/cpuset.h>
  13 }
  14
  15 #include <system_error>
  16
  17 #ifdef BOOST_HAS_ABI_HEADERS
  18 # include BOOST_ABI_PREFIX
  19 #endif
  20
  21 namespace boost {
  22 namespace fibers {
  23 namespace numa {
  24
  25 BOOST_FIBERS_DECL
  26 void pin_thread( std::uint32_t cpu_id) {
  27         cpuset_t mask;
  28         CPU_ZERO( & mask);
  29         CPU_SET( cpu_id, & mask);
  30     if ( BOOST_UNLIKELY( 0 != ::cpuset_setaffinity( CPU_LEVEL_WHICH, CPU_WHICH_TID, -1, sizeof( mask), & mask) ) ) {
  31         throw std::system_error(
  32                 std::error_code( errno, std::system_category() ),
  33                 "::cpuset_setaffinity() failed");
  34     }
  35 }
  36
  37 }}}
  38
  39 #ifdef BOOST_HAS_ABI_HEADERS
  40 # include BOOST_ABI_SUFFIX
  41 #endif