How often does the "slow path" actually trigger? With 32 TLB entries covering 128 KB, Intel claimed a 98% hit rate for typical workloads of the era. That sounds impressive, but a 2% miss rate means a page walk every 50 memory accesses -- still quite frequent. So the 386 overlaps page walks with normal instruction execution wherever possible. A dedicated hardware state machine performs each walk:
memcpy(y, x, h->length * sizes[h->type]);
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从定西张川城的黄土城垣到重庆江津的石佛寺，“我家门口有文物”这句话里有不同的风景，却藏着相同的守护与传承。
这大概是a16z这三份报告加在一起，传递出的最诚实的信号：AI的机会是真实的，但它不会自动变现。地基要打，数据要治理，场景要深挖，基础设施要重建。那些真正愿意做这些脏活的公司，才是这轮浪潮里最后站着的人。