Exemple #1
0
 void threadPoolFunction(std::pair<TaskSchedulerTBB::ThreadPool*,size_t>* pair)
 {
   TaskSchedulerTBB::ThreadPool* pool = pair->first;
   size_t threadIndex = pair->second;
   g_barrier.wait();
   pool->thread_loop(threadIndex);
 }
Exemple #2
0
  void TaskSchedulerTBB::ThreadPool::setNumThreads(size_t newNumThreads, bool startThreads)
  {
    Lock<MutexSys> lock(g_mutex);
    
    if (newNumThreads == 0)
      newNumThreads = getNumberOfLogicalThreads();

    numThreads = newNumThreads;
    if (!startThreads && !running) return;
    running = true;
    size_t numThreadsActive = numThreadsRunning;

    mutex.lock();
    numThreadsRunning = newNumThreads;
    mutex.unlock();
    condition.notify_all();

    /* start new threads */
    for (size_t t=numThreadsActive; t<numThreads; t++) 
    {
      if (t == 0) continue;
      auto pair = std::make_pair(this,t);
      threads.push_back(createThread((thread_func)threadPoolFunction,&pair,4*1024*1024,set_affinity ? t : -1));
      g_barrier.wait();
    }

    /* stop some threads if we reduce the number of threads */
    for (ssize_t t=numThreadsActive-1; t>=ssize_t(numThreadsRunning); t--) {
      if (t == 0) continue;
      embree::join(threads.back());
      threads.pop_back();
    }
  }
Exemple #3
0
    bool run ()
    {
      threadID.store(0);
      numFailed.store(0);

      size_t numThreads = getNumberOfLogicalThreads();
      threadResults.resize(numThreads);
      barrier.init(numThreads+1);

      /* create threads */
      std::vector<thread_t> threads;
      for (size_t i=0; i<numThreads; i++)
        threads.push_back(createThread((thread_func)thread_alloc,this));

      /* run test */ 
      for (size_t i=0; i<1000; i++)
      {
        for (size_t i=0; i<numThreads; i++) threadResults[i] = 0;
        barrier.wait();
        barrier.wait();
        for (size_t i=0; i<numThreads; i++) numFailed += threadResults[i] != i;
      }

      /* destroy threads */
      for (size_t i=0; i<numThreads; i++)
        join(threads[i]);

      return numFailed == 0;
    }