performance_utils.h

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// Copyright (c) 2014-2022, The Monero Project
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// 
// 1. Redistributions of source code must retain the above copyright notice, this list of
//    conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
//    of conditions and the following disclaimer in the documentation and/or other
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers

#pragma once

#include <iostream>

#include <boost/config.hpp>

#ifdef BOOST_WINDOWS
#include <windows.h>
#endif

void set_process_affinity(int core)
{
#if defined (__APPLE__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__NetBSD__) || defined(__sun)
    return;
#elif defined(BOOST_WINDOWS)
  DWORD_PTR mask = 1;
  for (int i = 0; i < core; ++i)
  {
    mask <<= 1;
  }
  ::SetProcessAffinityMask(::GetCurrentProcess(), core);
#elif defined(BOOST_HAS_PTHREADS)
  cpu_set_t cpuset;
  CPU_ZERO(&cpuset);
  CPU_SET(core, &cpuset);
  if (0 != ::pthread_setaffinity_np(::pthread_self(), sizeof(cpuset), &cpuset))
  {
    std::cout << "pthread_setaffinity_np - ERROR" << std::endl;
  }
#endif
}

void set_thread_high_priority()
{
#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(_NetBSD_) || defined(__sun)
    return;
#elif defined(BOOST_WINDOWS)
  ::SetPriorityClass(::GetCurrentProcess(), HIGH_PRIORITY_CLASS);
#elif defined(BOOST_HAS_PTHREADS)
  pthread_attr_t attr;
  int policy = 0;
  int max_prio_for_policy = 0;

  ::pthread_attr_init(&attr);
  ::pthread_attr_getschedpolicy(&attr, &policy);
  max_prio_for_policy = ::sched_get_priority_max(policy);

  if (0 != ::pthread_setschedprio(::pthread_self(), max_prio_for_policy))
  {
    std::cout << "pthread_setschedprio - ERROR" << std::endl;
  }

  ::pthread_attr_destroy(&attr);
#endif
}