一种用于多核系统的分布式引用计数机制  

Distributed Reference Counting for MulticoreSystem

作　　者：何升[1] 许国春[1] 殷红武[1] 

机构地区：[1]江南计算技术研究所,无锡214000

出　　处：《高性能计算技术》2012年第1期22-24,共3页

摘　　要：引用计数是操作系统常用的资源管理方法。随着处理器核的增加，传统的共享计数器将面临严重的性能问题。本文研究了现代操作系统中关于引用计数的优化方法，从减少锁竞争的角度出发，介绍一种分布式的引用计数机制，并在Linux上加以实现。分析和实验表明，对于频繁修改的引用计数，该方法有助于提高性能。Operating system, such as Linux, use shared counters for reference-counted garbage collection and to manage various resources. Asnumber of cores is growing, these counters will become bottlenecks in the multicore system. This paper studies on the reference counting inrecent operating systems, and introduce onedistributed technique called sloppy counter, which is designed to reduce the competition on lock between different cores.We implement sloppy counteron Linux, and, by experimentation on Apache, we show that itcan improve performance forcounters thatare modified frequently.

关 键 词：多核 操作系统 分布式 引用计数 

分 类 号：TP316[自动化与计算机技术—计算机软件与理论]