Simple, parallel virtual machines for extreme computations

Bijan Chokoufé Nejad

doi:10.1016/j.cpc.2015.05.015

2015-11-01

Bijan Chokoufé Nejad *

Thorsten Ohl

Jürgen Reuter

DOI：10.1016/j.cpc.2015.05.015

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摘要

En 中文

We introduce a virtual machine (VM) written in a numerically fast language like Fortran or C for evaluating very large expressions. We discuss the general concept of how to perform computations in terms of a VM and present specifically a VM that is able to compute tree-level cross sections for any number of external legs, given the corresponding byte-code from the optimal matrix element generator, OMEGA. Furthermore, this approach allows to formulate the parallel computation of a single phase space point in a simple and obvious way. We analyze hereby the scaling behavior with multiple threads as well as the benefits and drawbacks that are introduced with this method. Our implementation of a VM can run faster than the corresponding native, compiled code for certain processes and compilers, especially for very high multiplicities, and has in general runtimes in the same order of magnitude. By avoiding the tedious compile and link steps, which may fail for source code files of gigabyte sizes, new processes or complex higher order corrections that are currently out of reach could be evaluated with a VM given enough computing power. (C) 2015 Elsevier B.V. All rights reserved.

Keyword:

Virtual machine

High-performance computing

Automation of perturbative calculations

Higher orders

Parallel computation

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期刊

Computer Physics Communications

IF:

3.4

论文数:

1.2W

被引数:

3.7W

机构

deutsches elektronen-synchrotron (desy)

学者数:

5.7K

论文数: 4.8K

被引数: 10

Helmholtz Association

学者数:

13.2W

论文数: 10.7W

被引数: 145

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