The TLB lookup is combinational -- it evaluates in the same half-cycle as the limit check, requiring no additional clock. The common case (TLB hit, no page boundary crossing) adds zero overhead to a memory access. This is why the Segment Descriptor Cache and Page Cache (TLB) together occupy such substantial die area -- they are the fast path that makes protected mode competitive with real mode.
Author(s): Aojie Li, Han Hu, Tao Guo, Ruochen Sun, Mao Ye, Feng Tian, Yi Liu
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集市热热闹闹，总也走不完，像春节庙会。小时候见过扭秧歌、跑旱船、踩高跷，也看放烟花，像看唱戏一样。晚上冻得嘶嘶哈哈，杵在那儿。玩火药的蔡国强，我老感觉见过——冬拍了太多名人，照片多是我挑，挑来挑去，成了老熟人，好像街坊邻居。，详情可参考51吃瓜
7F7 CLI_STI JIO_OK ; jump to handler if CPL ≤ IOPL