利用XY坐标实现GPU缓存索引分布在帧缓冲区上的漫射  

Achieve scattering distribution of GPU cache indices on frame buffer via XY coordinates

作　　者：张俊[1,2] 

机构地区：[1]中南大学信息科学与工程学院,长沙410083 [2]中南大学先进控制与智能自动化湖南省工程实验室,长沙410083

出　　处：《吉林大学学报（工学版）》2013年第S1期29-33,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金：湖南省科技计划项目(2010ck3010)

摘　　要：针对为CPU设计的缓存索引映射技术会导致严重的缓存冲突缺失问题,本文提出了一种全新的基于像素XY坐标进行索引计算的XY型缓存索引映射技术。该方法可以在帧缓冲区上获得缓存行索引分布的良好漫射,并且能完全避免不同帧解像度的不良影响。实验结果表明,XY型缓存索引映射技术可使缓存缺失率最大降低82%。采用该技术的直接映射缓存或2-way组相联缓存的缺失率接近全相联缓存,这有助于降低缓存设计复杂度与缓存功耗。To solve the problem of serious cache conflict caused by traditional cache index mapping schemes,a new XY-type cache index mapping scheme based on the calculation from XY coordinates was proposed.A perfect scattering distribution of GPU cache index on frame buffer could be obtained,the bad effect caused by frame resolution was avoided completely.The evaluation results show that this scheme can reduce cache miss ratio by 82% at most.Since the direct-mapped or 2-way set-associative cache implementation can achieve the cache miss ratio close to full-associative cache,this scheme can decrease the design complexity and consumption power.

关 键 词：XY型缓存索引映射技术 XY方向的空间局部性 图形处理器 冲突缺失 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]