Offloading electromagnetic shower transport to GPUs

Offloading electromagnetic shower transport to GPUs
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将电磁簇射传输卸载到 GPU

DOI:
10.1088/1742-6596/2438/1/012055
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发表时间:
2023
期刊:
Conference Series
影响因子:
--
通讯作者:
Amadio G
Amadio G
中科院分区:
--
文献类型:
--
作者:
Amadio G

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使高能物理(HEP)的一般粒子输运模拟的单指令多线程(SIMT)友好,以利用加速器硬件,是一个重要的替代方案,以提高模拟应用程序的吞吐量。到目前为止,这一挑战尚未解决,因为难以将Geant 4组件和工作流程的复杂性映射到图形处理单元(GPU)暴露的大量并行功能。AdePT项目是解决这一限制的研发计划之一,并探索GPU作为潜在的加速器,用于卸载部分CPU模拟工作负载。我们的主要目标是在GPU上实现一个完整的电磁淋浴演示器。该项目是第一个在GPU上创建逼真的电子、正电子和伽马电磁簇射模拟的完整原型,可以作为独立应用程序或标准Geant 4 CPU工作流程的扩展来实现。我们的原型目前提供了一个平台来探索许多优化和不同的方法。我们提出了我们工作的最新结果和初步结论,使用独立的GPU性能分析和基于Geant 4的CPU和AdePT的GPU上的混合工作流的第一个实现。
Making general particle transport simulation for high-energy physics (HEP) single-instruction-multiple-thread (SIMT) friendly, to take advantage of accelerator hardware, is an important alternative for boosting the throughput of simulation applications. To date, this challenge is not yet resolved, due to difficulties in mapping the complexity of Geant4 components and workflow to the massive parallelism features exposed by graphics processing units (GPU). The AdePT project is one of the R&D initiatives tackling this limitation and exploring GPUs as potential accelerators for offloading some part of the CPU simulation workload. Our main target is to implement a complete electromagnetic shower demonstrator working on the GPU. The project is the first to create a full prototype of a realistic electron, positron, and gamma electromagnetic shower simulation on GPU, implemented as either a standalone application or as an extension of the standard Geant4 CPU workflow. Our prototype currently provides a platform to explore many optimisations and different approaches. We present the most recent results and initial conclusions of our work, using both a standalone GPU performance analysis and a first implementation of a hybrid workflow based on Geant4 on the CPU and AdePT on the GPU.
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