if(!in_mem(page[index],pb,m)){/*如果页面不在物理块中*/ p = getP(pb,p); pb[p].pnum = page[index]; pb[p].tm= 0; lps++; for(inti=0;i<M;i++){ rel[i][index] = pb[i].pnum; } }else{/*如果页面在物理块中*/ intin = getEQnum(page[index],pb);/*获取该页面在物理...
通常,把选择换出页⾯的算法称为页 ⾯置换算法(Page_Replacement Algorithms)。 ⼀个好的页⾯置换算法,应具有较低的页⾯更换频率。从理论上讲,应将那些以后不再会访问的页⾯换出,或将那些在较长时间内不会再访 问的页⾯调出。 ⼀、最佳置换算法OPT(Optimal) 它是由Belady于1966年提出的⼀种...
通常,把选择换出页⾯的 算法称为页⾯置换算法(Page-Replacement Algorithms)。置换算法的好坏将直接影响到系统的性能。 1) 先进先出(FIFO)页⾯置换算法 该算法总是淘汰最先进⼊内存的页⾯,即选择在内存中驻留时间最久的页⾯予以淘汰。该算法实现简单,只需把⼀个进程调⼊内存,按先后 顺序排成⼀个...
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This project implements a simple thread-safe cache with several page replacement policies: Least Recently Used First-In/First-Out Least Frequently Used More about cache algorithms and policy you could read onWikipedia Usage Using this library is simple. It is necessary to include header with the ...