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.
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“要发扬民主、集思广益，广泛凝聚共识。”2月27日召开的中央政治局会议对审查讨论“十五五”规划纲要草案提出明确要求，为开好全国两会提供重要指引。