x265线程池-3

ThreadPool的allocThreadPools主要功能是：

创建线程池，并计算出来jobprovider的个数和workthread的个数。

其中numaNode的结构如下：

 NUMA体系结构中多了Node的概念，这个概念其实是用来解决core的分组的问题，具体参见下图来理解（图中的OS CPU可以理解thread，那么core就没有在图中画出），从图中可以看出每个Socket里有两个node，共有4个socket，每个socket 2个node，每个node中有8个thread，总共4（Socket）× 2（Node）× 8 （4core × 2 Thread） = 64个thread
 

需要计算出来每个node的线程数目，每个node创建一个threadpool。

ThreadPool* ThreadPool::allocThreadPools(x265_param* p, int& numPools, bool isThreadsReserved)
{
    enum { MAX_NODE_NUM = 127 };
    int cpusPerNode[MAX_NODE_NUM + 1];
    int threadsPerPool[MAX_NODE_NUM + 2];
    uint64_t nodeMaskPerPool[MAX_NODE_NUM + 2];
    int totalNumThreads = 0;

    memset(cpusPerNode, 0, sizeof(cpusPerNode));
    memset(threadsPerPool, 0, sizeof(threadsPerPool));
    memset(nodeMaskPerPool, 0, sizeof(nodeMaskPerPool));

    int numNumaNodes = X265_MIN(getNumaNodeCount(), MAX_NODE_NUM);
    bool bNumaSupport = false;

    cpusPerNode[0] = getCpuCount();
 

    if (bNumaSupport && p->logLevel >= X265_LOG_DEBUG)
    for (int i = 0; i < numNumaNodes; i++)
        x265_log(p, X265_LOG_DEBUG, "detected NUMA node %d with %d logical cores\n", i, cpusPerNode[i]);
    /* limit threads based on param->numaPools
     * For windows because threads can't be allocated to live across sockets
     * changing the default behavior to be per-socket pools -- FIXME */
#if defined(_WIN32_WINNT) && _WIN32_WINNT >= _WIN32_WINNT_WIN7
    if (!p->numaPools || (strcmp(p->numaPools, "NULL") == 0 || strcmp(p->numaPools, "*") == 0 || strcmp(p->numaPools, "") == 0))
    {
         char poolString[50] = "";
         for (int i = 0; i < numNumaNodes; i++)
         {
             char nextCount[10] = "";
             if (i)
                 sprintf(nextCount, ",%d", cpusPerNode[i]);
             else
                   sprintf(nextCount, "%d", cpusPerNode[i]);
             strcat(poolString, nextCount);
         }
         x265_param_parse(p, "pools", poolString);
     }
#endif
    if (p->numaPools && *p->numaPools)
    {
        const char *nodeStr = p->numaPools;
        for (int i = 0; i < numNumaNodes; i++)
        {
            if (!*nodeStr)
            {