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.
但速度与质量之间，未必是鱼和熊掌不可兼得。就在刚刚，Google 正式发布了他们的新一代图像生成模型：Nano Banana 2（Gemini 3.1 Flash Image）。
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