A Design Scheme for Improving Real-time Property of Memory Management in Linux
Wang Zhao-we · Jisuanji gongcheng · 2014
To the problem of imperfection in real-time property of memory management under Linux system,this paper designs a solution to improve the timeliness. It works in three aspects:establishing a mapping relationship between virtual address and physical address to reduce the switch between the user mode and kernel mode,locking memory to avoid page exchanging,improving the original algorithm of memory management to remove the nondeterministic operations. The modified memory management algorithm is based on the principle of partitioned management and best fit,whose time complexity is O(1). Experimental results show that this solution is a good way to improve the performance of memory management,in the environment of memory tension,its effect is more obvious,and performance improvement rate can reach49.5%. It meets the requirement of real-time.