Abstract: This paper proposes a memory compress mechanism for embedded system. It utilizes Linux page swap mechanism to create a memory-based swap partition. When the system runs out of memory and needs to swap some pages to the memory-based swap partition, the mechanism compresses those pages to provide more available memory to applications and users. A proper algorithm is used to match the best availe memory slots to avoid memory fragments. Experimental results indicate that it can provide more than 50% available memory.

Key words: memory compress, swap partition, page swap, block device driver

摘要： 提出了一种适用于嵌入式设备的内存压缩机制。利用Linux的页面交换机制，创建一个基于内存的交换分区。当系统内存不足需要将某些页面交换到该分区上时，通过压缩这些页面向应用程序和用户提供更多的可用内存。使用空闲内存块匹配算法避免出现过多的内存碎片而影响系统性能。实验测试表明，使用该机制通常可以获得大于50%的可用内存。

关键词: 内存压缩, 交换分区, 页面交换, 块设备驱动

CLC Number: 

• TP311.5