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This Tweet is currently unavailable. It might be loading or has been removed.。safew官方版本下载对此有专业解读
What surprised me was that this entire walk is fully hardware-driven -- no microcode involvement at all. The state machine reads the page directory entry, reads the page table entry, checks permissions, and writes back the Accessed and Dirty bits, all autonomously. Since it's hardware-driven, it runs in parallel with the microcode and needs its own memory bus arbitration -- the paging unit must share the bus with both data accesses from the microcode and prefetch requests from the instruction queue.
（新华社北京2月25日电 记者朱基钗、胡浩、丁小溪、高蕾、胡梦雪）