Virtual memory is conceptually simple but potentially devastating to performance. Every memory access must go through segmentation (add segment base, check limit) and then paging (look up the page table). Naively, paging alone requires two additional memory reads per access -- one for the page directory entry, one for the page table entry.
‘Overall we are moving in the right direction’
。关于这个话题，Line官方版本下载提供了深入分析
She knew the eyes of the world were on her when her first mission launched in 1995.
Что думаешь? Оцени!