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比较页式虚拟存储器和段式虚拟存储器的优缺点。

问答题
2021-12-28 23:53
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正确答案

页式虚拟存储器管理方法的主要优点是页表硬件少,查表速度快,主存零头少;主要缺点是分页无逻辑意义,不利于存储保护。
而段式虚拟存储器管理方法的优点是段的界限分明,支持程序的模块化设计,易于对程序段的编译、修改和保护;便于多道程序的共享。主要缺点是因为段的长度不同,所以主存利用率不高,且因为段间地址不连续会产生大量的内存碎片,造成浪费;段表庞大查表速度慢。


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