| 采用GPU的提升纹理缓存命中光线投射方法 |
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| 引用本文： | 杜松江,张思超.采用GPU的提升纹理缓存命中光线投射方法[J].华侨大学学报(自然科学版),2016,0(5):627-632. |
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| 作者姓名： | 杜松江 张思超 |
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| 作者单位： | 1. 长江大学工程技术学院 信息工程学院, 湖北 荆州 434020;2. 中国矿业大学 机电工程学院, 江苏 徐州 221116 |
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| 摘 要： | 提出一种改善纹理缓存命中率的方法.首先,分析图形处理器(GPU)中三维纹理组织的布局特性;进而提出根据视点的变化动态选择线程配置的策略,目的在于最小化warp级的投射光线纹理访存跨距;最后,算法用CUDA(compute unified device architecture)实现并验证.实验结果表明:当视点分别围绕x,y,z坐标轴旋转时,改进后算法的帧速率分别为改进前的1.08,1.14,0.98倍.
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| 关 键 词： | 三维纹理 光线投射 图形处理单元 纹理缓存 |
Improving Texture Cache-Hit Rate of GPU-Based Ray Casting |
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| DU Songjiang,ZHANG Sichao.Improving Texture Cache-Hit Rate of GPU-Based Ray Casting[J].Journal of Huaqiao University(Natural Science),2016,0(5):627-632. |
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| Authors: | DU Songjiang ZHANG Sichao |
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| Institution: | 1. College of Information Engineering, Yangtze University College of Engineering Technology, Jingzhou 434020, China; 2. School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou 221116, China |
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| Abstract: | This paper presents a method of improving the texture cache hitrate for GPU-based volume rendering. Firstly, we analyze the data layout of 3D texture in GPU. Based on it, a dynamic strategy of selecting the thread block shape according to the viewpoint is proposed. The strategy can minimize the access stride for the warp-level threads. Finally, we realize the method in CUDA(compute unified device architecture)and testify the effectiveness. The experimental results show that when the viewpoint rotates around the x-, y-, z- axis, the frame rates are 1.08, 1.14 and 0.98 time faster than that of static thread block shape configuration, respectively. |
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| Keywords: | 3D texture ray casting graphics processing unit texture cache |
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