Apply GPU to accelerate the convolution computation of signal shape and detector resolution changed with energy

Hao QIAO; Siguang WANG

doi:10.11889/j.0253-3219.2018.hjs.41.080404

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Apply GPU to accelerate the convolution computation of signal shape and detector resolution changed with energy

NUCLEAR ELECTRONICS AND INSTRUMENTATION | 更新时间：2021-05-19

- Apply GPU to accelerate the convolution computation of signal shape and detector resolution changed with energy
- NUCLEAR TECHNIQUES Vol. 41, Issue 8, Article number: 080404(2018)
- 作者机构：
  
  北京大学物理学院核物理与核技术国家重点实验室及高能物理中心北京 100871
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China;the National Key Programme for Research and Development (NKPRD) from Ministry of Science and Technology, China
- DOI：10.11889/j.0253-3219.2018.hjs.41.080404
  CLC： TL817.1
- Received：28 March 2018，
  
  Revised：12 April 2018，
  
  Published：2018-08
- 稿件说明：
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Hao QIAO, Siguang WANG. Apply GPU to accelerate the convolution computation of signal shape and detector resolution changed with energy[J]. Nuclear techniques, 2018, 41(8): 080404
DOI：

Hao QIAO, Siguang WANG. Apply GPU to accelerate the convolution computation of signal shape and detector resolution changed with energy[J]. Nuclear techniques, 2018, 41(8): 080404 DOI： 10.11889/j.0253-3219.2018.hjs.41.080404.

摘要

在形如中微子能谱分析中，因其本征能谱跨度较大，在积分描述所探测到的能谱时，探测器分辨率本身随能量的连续变化应该被考虑。对于该类能谱的拟合分析，传统的单靠中央处理器（Central Processing Unit，CPU）无法保障时间要求。本文利用图形处理器（Graphics Processing Unit，GPU）配合使用统一计算架构（Compute Unified Device Architecture，CUDA）和RooFit计算框架来加速数值积分过程，测试显示：当计算节点数目较多，如10

个节点时，利用文中的方法GPU（型号：K80）相较于CPU（型号：E5-2603 v3）能够带来218倍的速度提升。所述方法可作为类似实验的参考。

Abstract

Background

The relationship of detector resolution changed with energy should be considered when the intrinsic spectra have wide range in experiments like neutrino energy measurement. The normal numerical integration method using center processing unit (CPU) does not meet the performance requirement.

Purpose

This study aims to find a method which can accelerate the convolution operation without losing convenience.

Methods

The graphics processing unit (GPU) and compute unified device architecture (CUDA) toolkit are employed to implement RooFit's probability density function (PDF) class and calculate the numerical integration parallelly.

Results

In the test server using E5-2603 v3 as CPU and K80 as GPU

this method improves the speed as high as 218 times when the integration nodes set to be 1 million.

Conclusion

Combining GPU with RooFit library can get a significant improvement in the speed without lose RooFit's convenience. The method could be an example for those experiments which need complicated convolution calculations.

关键词

Keywords

references

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