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Either way, the delay slots do useful work: they compute the descriptor address and start reading it from memory. By the time the PLA verdict arrives, the hardware is already prepared for whichever path is selected. No cycles are wasted.,推荐阅读Line官方版本下载获取更多信息
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"We've got to get those astronauts to the Moon and then back again, completely safely," says Cleaver.,更多细节参见下载安装 谷歌浏览器 开启极速安全的 上网之旅。
Virtual memory is conceptually simple but potentially devastating to performance. Every memory access must go through segmentation (add segment base, check limit) and then paging (look up the page table). Naively, paging alone requires two additional memory reads per access -- one for the page directory entry, one for the page table entry.