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arXiv 1707.07263cs.DC
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基于GPU的FFT内存优化并行实现方法

A GPU Based Memory Optimized Parallel Method For FFT Implementation

Fan Zhang, Chen Hu, Qiang Yin, Wei Hu

摘要:

快速傅立叶变换(FFT)在数字信号处理、数字图像处理等领域有着非常重要的作用,但在实际应用中,FFT成为影响处理效率的一个因素,特别是在遥感领域,需要对大量的数据进行FFT处理。因此缩短FFT计算时间显得尤为重要。GPU(图形处理单元)已应用于许多常见领域,与CPU(中央处理单元)平台相比,其加速效果非常明显。本文提出了一种新的在GPU上并行执行FFT的方法。基于GPU存储系统和硬件处理流水线,改进了数据存储方式。根据数据的大小对数据进行合理的划分,充分利用GPU的特点。提出了基于共享内存和纹理内存的内存优化方法,减少了全局内存访问次数,提高了效率。结果表明,基于GPU的内存优化FFT实现不仅比CPU平台上的FFTW库提高了100%以上,而且比GPU平台上的CUFFT库提高了30%以上。

英文摘要:

FFT (fast Fourier transform) plays a very important role in many fields, such as digital signal processing, digital image processing and so on. However, in application, FFT becomes a factor of affecting the processing efficiency, especially in remote sensing, which large amounts of data need to be processed with FFT. So shortening the FFT computation time is particularly important. GPU (Graphics Processing Unit) has been used in many common areas and its acceleration effect is very obvious compared with CPU (Central Processing Unit) platform. In this paper, we present a new parallel method to execute FFT on GPU. Based on GPU storage system and hardware processing pipeline, we improve the way of data storage. We divided the data into parts reasonably according the size of data to make full use of the characteristics of the GPU. We propose the memory optimized method based on share memory and texture memory to reduce the number of global memory access to achieve better efficiency. The results show that the GPU-based memory optimized FFT implementation not only can increase over 100% than FFTW library in CPU platform, but also can improve over 30% than CUFFT library in GPU platform.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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