SPMD OpenMP versus MPI on a IBM SMP for 3 Kernels of the NAS Benchmarks.
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| Title: | SPMD OpenMP versus MPI on a IBM SMP for 3 Kernels of the NAS Benchmarks. |
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| Authors: | Krawezik, Géraud, Alléon, Guillaume, Cappello, Franck |
| Source: | High Performance Computing (9783540436744); 2006, p425-436, 12p |
| Abstract: | Shared Memory Multiprocessors are becoming more popular since they are used to deploy large parallel computers. The current trend is to enlarge the number of processors inside such multiprocessor nodes. However a lot of existing applications are using the message passing paradigm even when running on shared memory machines. This is due to three main factors: 1) the legacy of previous versions written for distributed memory computers, 2) the difficulty to obtain high performances with OpenMP when using loop level parallelization and 3) the complexity of writing multithreaded programs using a low level thread library. In this paper we demonstrate that OpenMP can provide better performance than MPI on SMP machines. We use a coarse grain parallelization approach, also known as the SPMD programming style with OpenMP. The performance evaluation considers the IBM SP3 NH2 and three kernels of the NAS benchmark: FT, CG and MG. We compare three implementations of them: the NAS 2.3 MPI, a fine grain (loop level) OpenMP version and our SPMD OpenMP version. A breakdown of the execution times provides an explanation of the performance results. [ABSTRACT FROM AUTHOR] |
| Copyright of High Performance Computing (9783540436744) is the property of Springer Nature / Books and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Complementary Index |
| FullText | Text: Availability: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: SPMD OpenMP versus MPI on a IBM SMP for 3 Kernels of the NAS Benchmarks. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Krawezik%2C+Géraud%22">Krawezik, Géraud</searchLink><br /><searchLink fieldCode="AR" term="%22Alléon%2C+Guillaume%22">Alléon, Guillaume</searchLink><br /><searchLink fieldCode="AR" term="%22Cappello%2C+Franck%22">Cappello, Franck</searchLink> – Name: TitleSource Label: Source Group: Src Data: High Performance Computing (9783540436744); 2006, p425-436, 12p – Name: Abstract Label: Abstract Group: Ab Data: Shared Memory Multiprocessors are becoming more popular since they are used to deploy large parallel computers. The current trend is to enlarge the number of processors inside such multiprocessor nodes. However a lot of existing applications are using the message passing paradigm even when running on shared memory machines. This is due to three main factors: 1) the legacy of previous versions written for distributed memory computers, 2) the difficulty to obtain high performances with OpenMP when using loop level parallelization and 3) the complexity of writing multithreaded programs using a low level thread library. In this paper we demonstrate that OpenMP can provide better performance than MPI on SMP machines. We use a coarse grain parallelization approach, also known as the SPMD programming style with OpenMP. The performance evaluation considers the IBM SP3 NH2 and three kernels of the NAS benchmark: FT, CG and MG. We compare three implementations of them: the NAS 2.3 MPI, a fine grain (loop level) OpenMP version and our SPMD OpenMP version. A breakdown of the execution times provides an explanation of the performance results. [ABSTRACT FROM AUTHOR] – Name: Abstract Label: Group: Ab Data: <i>Copyright of High Performance Computing (9783540436744) is the property of Springer Nature / Books and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/3-540-47847-7_39 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 12 StartPage: 425 Titles: – TitleFull: SPMD OpenMP versus MPI on a IBM SMP for 3 Kernels of the NAS Benchmarks. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Krawezik, Géraud – PersonEntity: Name: NameFull: Alléon, Guillaume – PersonEntity: Name: NameFull: Cappello, Franck IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Text: 2006 Type: published Y: 2006 Identifiers: – Type: isbn-print Value: 9783540436744 Titles: – TitleFull: High Performance Computing (9783540436744) Type: main |
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