面向数据密集型应用的细粒度内存管理方案

Fine-Grained Memory Management Scheme for Data Intensive Applications

提出并实现了一种细粒度内存管理方案.该方案以用户数据对象为粒度对内存进行管理,当需要将部分内存数据换出以获得空闲内存空间时,不再像传统操作系统以页为单位换出,而是将多个冷数据对象换出到底层存储设备中,最大限度地保证了被换出的数据近期内不会再次被访问,从而有效减少了额外的I/O开销.测试结果表明,本方案与操作系统页交换机制相比,系统响应速度平均提高了37.5%.

For data intensive applications, a fine-Grained memory management scheme was proposed. The object-granularity data exchange between dynamic random access memory （DRAM） and swap device scheme was achieved. When DRAM is to be exhausted, the proposed scheme will swap data objects with low access frequency out to swap device, which reduces extra system I/O effectively. Compared to Linuxswap system, the proposed scheme improves system performance up to 37.5% in average.