找出違反pthread親和力政策，然後Linux內核2.6.32

Question

我想了解在HT系統中創建pthreads時，什麼是默認親和力政策，其次是科學Linux內核2.6.32。有沒有辦法知道它？在pthreads的創建中，不存在對關聯的調用，所以我認爲親和力留給了操作系統。

Answer 1

不知道這是有益的，但這裏是一些代碼，將獲得和使用並行線程API設置線程的親和力：

// nail down this thread so it will only run on a specific CPU 
cpu_set_t tCPUSet; 
CPU_ZERO(&tCPUSet); 
CPU_SET(ENCODE_LEFT_THREAD_CPU, &tCPUSet); 
nReturnCode = pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &tCPUSet); 
if (nReturnCode == -1) { 
    pLogFile->Write(LOG_ERR, "ERROR: encodeLeftThread(): pthread_setaffinity() failed, %s, exiting thread... ", strerror(errno)); 
    nThreadReturnValue = THREAD_CPU_AFFINITY_ERRORS; 
    pthread_exit((void *)&nThreadReturnValue); 
} 

CPU_ZERO(&tCPUSet); 
nReturnCode = pthread_getaffinity_np(pthread_self(), sizeof(cpu_set_t), &tCPUSet); 
if (nReturnCode == -1) { 
    pLogFile->Write(LOG_ERR, "ERROR: encodeLeftThread(): 2nd pthread_getaffinity() failed, %s, exiting thread... ", strerror(errno)); 
    nThreadReturnValue = THREAD_CPU_AFFINITY_ERRORS; 
    pthread_exit((void *)&nThreadReturnValue); 
} 

sCPUs.clear(); 
sCPUs.append(" new left thread CPU affinity: "); 
if (bInitLog) { 
    for (int i = 0; i < CPU_SETSIZE; i++) { 
     if (CPU_ISSET(i, &tCPUSet)) { 
      sCPUs.append(" "); 
      char c = '0' + i; 
      sCPUs = sCPUs + c; 
     } 
    } 
} 
if (bInitLog) pLogFile->Write(LOG_DEBUG, "%s ", sCPUs.c_str());