> the shared reference analogy describes what happens in a computer. Nothing is truly parallel when accessing a shared resource. We need to take turns reading t

> the shared reference analogy describes what happens in a computer. Nothing is truly parallel when accessing a shared resource. We need to take turns reading the pages. The hardware does this quickly by means of cached copies. This exists, but it's uncommon: https://en.wikipedia.org/wiki/Dual-ported_RAM https://en.wikipedia.org/wiki/Dual-ported_RAM , https://en.wikipedia.org/wiki/Dual-ported_video_RAM https://en.wikipedia.org/wiki/Dual-ported_video_RAM