Hybrid-view programming of nuclear fusion simulation code in the PGAS parallel programming language XcalableMP

Tsugane, Keisuke; Nuga, Hideo; Boku, Taisuke; Murai, Hitoshi; Sato, Mitsuhisa; Tang, W. M.; Wang, Bei

doi:10.1109/padsw.2014.7097864

Cited by 3 publications

(2 citation statements)

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“…In this study, we implement the GTC-P code in two ways: using XMP with a localview only model, and with a combination of local-view and global-view models, where we evaluate the performance and productivity of these approaches. As the preliminary result, we implemented and evaluated the GTC-P in XMP hybrid-view model [15]. Moreover, we indicate the causes of performance degradation for GTC-P in XMP and evaluate the GTC-P of hybrid versions written in XMP+OpenMP and MPI+OpenMP in this study.…”

Section: Introductionmentioning

confidence: 94%

Hybrid-View Programming of Nuclear Fusion Simulation Code in XcalableMP

Tsugane

Boku

Murai

et al. 2020

XcalableMP PGAS Programming Language

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XcalableMP(XMP) supports a global-view model that allows programmers to define global data and to map them to a set of processors, which execute the distributed global data as a single thread. In XMP, the concept of a coarray is also employed for local-view programming. In this study, we port Gyrokinetic Toroidal Code - Princeton (GTC-P), which is a three-dimensional gyrokinetic PIC code developed at Princeton University to study the microturbulence phenomenon in magnetically confined fusion plasmas, to XMP as an example of hybrid memory model coding with the global-view and local-view programming models. In local-view programming, the coarray notation is simple and intuitive compared with Message Passing Interface (MPI) programming, while the performance is comparable to that of the MPI version. Thus, because the global-view programming model is suitable for expressing the data parallelism for a field of grid space data, we implement a hybrid-view version using a global-view programming model to compute the field and a local-view programming model to compute the movement of particles. The performance is degraded by 20% compared with the original MPI version, but the hybrid-view version facilitates more natural data expression for static grid space data (in the global-view model) and dynamic particle data (in the local-view model), and it also increases the readability of the code for higher productivity.

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Section: Introductionmentioning

confidence: 94%

Hybrid-View Programming of Nuclear Fusion Simulation Code in XcalableMP

Tsugane

Boku

Murai

et al. 2020

XcalableMP PGAS Programming Language

Self Cite

View full text Add to dashboard Cite

show abstract

“…In this study, we implement the GTC-P code in two ways: using XMP with a local-view only model, and with a combination of local-view and globalview models, where we evaluate the performance and productivity of these approaches. As the preliminary result, we implemented and evaluated the GTC-P in XMP hybrid-view model [10]. Moreover, we indicate the causes of performance degradation for GTC-P in XMP and evaluate the GTC-P of hybrid versions written in XMP+OpenMP and MPI+OpenMP in this study.…”

Section: Introductionmentioning

confidence: 94%

Hybrid-view programming of nuclear fusion simulation code in the PGAS parallel programming language XcalableMP

et al. 2016

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Recently, the Partitioned Global Address Space (PGAS) parallel programming model has emerged as a usable distributed memory programming model. Xcal-ableMP (XMP) is a PGAS parallel programming language that extends base languages such as C and Fortran with directives in OpenMP-like style. XMP supports a global-view model that allows programmers to define global data and to map them to a set of processors, which execute the distributed global data as a single thread. In XMP, the concept of a coarray is also employed for local-view programming. In this study, we port Gyrokinetic Toroidal Code-Princeton (GTC-P), which is a three-dimensional gyrokinetic PIC code developed at Princeton University to study the microturbulence phenomenon in magnetically confined fusion plasmas, to XMP as an example of hybrid memory model coding with the global-view and local-view programming models. In local-view programming, the coarray notation is simple and intuitive compared with Message Passing Interface (MPI) programming while the performance is comparable to that of the MPI version. Thus, because the global-view programming model is suitable for expressing the data parallelism for a field of grid space data, we implement a hybrid-view version using a global-view programming model to compute the field and a local-view programming model to compute the movement of particles. The performance is degraded by 20% compared with the original MPI version, but the hybrid-view version facilitates more natural data expression for static grid space data (in the global-view model) and

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