If you allocate a block of memory on the heap that is not already in the cache, execution will stall while the contents of that memory are brought into the cache.
如果在堆的顶部分配的内存块不在缓存中，执行会在内存内容装入缓存的过程中出现延迟。
2
To allocate an Internet protocol control block, in_pcballoc() is called.
要分配 Internet 协议控制块，可调用 in_pcballoc()。
3
The solidDB solution is made possible by the ability to allocate row images and row shadow images (different versions of the same row) without using inefficient block structures.