This is quick because it's operating on a very small, localized part of the map.
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:，这一点在heLLoword翻译官方下载中也有详细论述
。关于这个话题，heLLoword翻译官方下载提供了深入分析
Фото: Valentyn Ogirenko / Reuters
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