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基于GPU的生態(tài)環(huán)境遙感評(píng)價(jià)模型并行化研究
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國(guó)家自然科學(xué)基金項(xiàng)目(31471762)


Parallelization on Model of Ecological Environment Remote Sensing Evaluation Based on GPU
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    摘要:

    通過(guò)基于GPU的生態(tài)環(huán)境遙感評(píng)價(jià)模型并行化研究,在深入分析CPU+GPU異構(gòu)通用計(jì)算平臺(tái)數(shù)據(jù)傳輸瓶頸的基礎(chǔ)上,設(shè)計(jì)了數(shù)據(jù)分片、異步傳輸?shù)腉PU圖像處理框架。在此基礎(chǔ)上,將碳固定量、草地退化指數(shù)和生態(tài)環(huán)境指數(shù)3個(gè)計(jì)算模型基于CUDA進(jìn)行并行化實(shí)現(xiàn),并通過(guò)實(shí)驗(yàn)驗(yàn)證了該技術(shù)方法的有效性,隨著數(shù)據(jù)規(guī)模的變大,碳固定量計(jì)算模型的加速比達(dá)到了8.04倍,草地退化指數(shù)計(jì)算模型的加速比達(dá)到了12.21倍,生態(tài)環(huán)境指數(shù)計(jì)算模型的加速比達(dá)到了7.45倍。

    Abstract:

    In order to solve the problem of the model’s slowly processing speed of ecological environment remote sensing evaluation currently, a framework about GPU image processing was designed with data partitioning and scheduling asynchronous transmission which was based on the in-depth analysis about the data transmission bottleneck of heterogeneous CPU+GPU general computing platform. It included the carbon fixed quantity and grassland degradation index, whose intrinsic parallelism met the GPU computing features. For the above models, it was put forward based on CUDA parallel implementation. The core link of indexes for evaluation of ecological environment of remote sensing data standardization and weighted fusion of CUDA parallel module were implemented. Finally, the effectiveness of technical methods was verified through experiments, as the scale of data became larger, the parallel execution speed of three business models became faster, the speedup ratio of the fixed amount of carbon achieved a 8.04 times execution rate lift;the speedup ratio of the index of grassland degradation achieved a 12.21 times execution rate lift;and the speedup ratio of the index of ecological environment achieved a 7.45 times execution rate lift. At the same time, the speedup ratio was decreased as the number of input data files increased, equipment between I/O was still the main factor which restricted the running efficiency of the algorithm.

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李林,顧進(jìn)鋒,宋安捷,鄭海寧,曹津,朱德海.基于GPU的生態(tài)環(huán)境遙感評(píng)價(jià)模型并行化研究[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2017,48(5):135-141. LI Lin, GU Jinfeng, SONG Anjie, ZHENG Haining, CAO Jin, ZHU Dehai. Parallelization on Model of Ecological Environment Remote Sensing Evaluation Based on GPU[J]. Transactions of the Chinese Society for Agricultural Machinery,2017,48(5):135-141.

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  • 收稿日期:2016-08-31
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  • 在線發(fā)布日期: 2017-05-10
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