Evaluation of PETSc on a Heterogeneous Architecture, the OLCF Summit System: Part II - Basic Communication Performance

Zhang, Junchao; Mills, Richard; Smith, Barry

doi:10.2172/1721624

Cited by 2 publications

(2 citation statements)

References 5 publications

(6 reference statements)

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“…We also performed inter-socket and inter-node tests. Results, see [24], indicated a similar gap between the PetscSF test and the OSU test. We used the same test and compared PetscSF MPI and PetscSF NVSHMEM, with results shown in Fig.…”

Section: Petscsf Ping Pongmentioning

confidence: 74%

The PetscSF Scalable Communication Layer

Zhang

Brown

Balay

et al. 2021

Preprint

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PetscSF, the communication component of the Portable, Extensible Toolkit for Scientific Computation (PETSc), is being used to gradually replace the direct MPI calls in the PETSc library. PetscSF provides a simple application programming interface (API) for managing common communication patterns in scientific computations by using a star-forest graph representation. PetscSF supports several implementations whose selection is based on the characteristics of the application or the target architecture. An efficient and portable model for network and intra-node communication is essential for implementing large-scale applications. The Message Passing Interface, which has been the de facto standard for distributed memory systems, has developed into a large complex API that does not yet provide high performance on the emerging heterogeneous CPU-GPU-based exascale systems. In this paper, we discuss the design of PetscSF, how it can overcome some difficulties of working directly with MPI with GPUs, and we demonstrate its performance, scalability, and novel features.

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