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关于CacheLine的问题 #2

@tk-xiong

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@tk-xiong
  1. 为啥CacheLine 你代码里面写的是256?

  2. 为啥这里定义的时候,前后的大小是一致的?
    char _frontPadding[CACHELINE_PADDING_FOR_ATOMIC_INT64_SIZE];
    std::atomic_int64_t _seq;
    char _backPadding[CACHELINE_PADDING_FOR_ATOMIC_INT64_SIZE];

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