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• W41444163 abstract "The recent emergence of multi-core CPU and many-core GPU architectures has made parallel computing more accessible. Hundreds of industrial and research applications have been mapped onto GPUs to further utilize the extra computing resource. In bioinformatics, HMMER is a set of widely used applications for sequence analysis based on Hidden Markov Model. One of the tools in HMMER, hmmsearch, and the Smith-Waterman algorithm are two important tools for protein sequence analysis that use dynamic programming. Both tools are particularly well-suited for many-core GPU architecture due to the parallel nature of sequence database searches.After studying the existing research on CUDA acceleration in bioinformatics, this thesis investigated the acceleration of the key Multiple Segment Viterbi algorithm in HMMER version 3. A fully-featured CUDA-enabled protein database search tool cudaHmmsearch was designed, implemented and optimized. We demonstrated a variety of optimization strategies that are useful for general purpose GPU-based applications. Based on our optimization experience in parallel computing, sixsteps were summarized for optimizing performance using CUDA programming.We made comprehensive tests and analysis for multiple enhancements in our GPU kernels in order to demonstrate the effectiveness of selected approaches. The performance analysis showed that GPUs are able to deal with intensive computations, but are very sensitive to random accesses to the global memory. The results show that our implementation achieved 2.5x speedup over the single-threaded HMMER3 CPU SSE2 implementation on average." @default.
• W41444163 created "2016-06-24" @default.
• W41444163 creator A5044117170 @default.
• W41444163 date "2014-07-27" @default.
• W41444163 modified "2023-09-27" @default.
• W41444163 title "Implementing and Accelerating HMMER3 Protein Sequence Search on CUDA-Enabled GPU" @default.
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