NAS Parallel Benchmarks: Difference between revisions

Revision as of 17:43, 26 July 2012

Revision as of 15:11, 12 October 2012

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==History==

===Motivation===

Traditional benchmarks that existed before NPB, such as the [[Livermore loops]], the [[LINPACK|LINPACK Benchmark]] and the [http://www.netlib.org/benchmark/nas NAS Kernel Benchmark Program], were usually specialized for vector computers. They generally suffered from inadequacies including parallelism-impeding tuning restrictions and insufficient problem sizes, which rendered them inappropriate for highly parallel systems. Equally unsuitable were full-scale application benchmarks due to high porting cost and unavailability of automatic software parallelization tools.<ref name="rnr94007">{{Citation

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===NPB 3===

NPB 3 retained the MPI implementation from NPB 2 and came in more flavors, namely [[OpenMP]],<ref name="nas99011">{{Citation

|last1=Jin|first1=H.

|last2=Frumkin|first2=M.

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|publisher=NASA Ames Research Center, Moffett Field, CA

|postscript=<!--none-->

}}</ref>, [[Java (programming language)|Java]]<ref name="nas02009">{{Citation

|last1=Frumkin|first1=M.

|last2=Schultz|first2=M.

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|publisher=NASA Ames Research Center, Moffett Field, CA

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}}</ref> and [[High Performance Fortran]].<ref name="nas98009">{{Citation

|last1=Frumkin|first1=M.

|last2=Jin|first2=H.

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|publisher=NASA Ames Research Center, Moffett Field, CA

|postscript=<!--none-->

}}</ref>. These new parallel implementations were derived from the serial codes in NPB 2.3 with additional optimizations.<ref name="npbchanges"/> NPB 3.1 and NPB 3.2 added three more benchmarks,<ref name="nas04006">{{Citation

|last1=Feng|first1=H.

|last2=van der Wijngaart|first2=F.

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|publisher=NASA Ames Research Center, Moffett Field, CA

|postscript=<!--none-->

}}</ref>, which, however, were not available across all implementations; NPB 3.3 introduced a ''Class E'' problem size.<ref name="npbchanges"/> Based on the single-zone NPB 3, a set of multi-zone benchmarks taking advantage of the MPI/OpenMP hybrid programming model were released under the name '''NPB-Multi-Zone''' ('''NPB-MZ''') for "testing the effectiveness of multi-level and hybrid parallelization paradigms and tools".<ref name="npbweb"/><ref name="nas03010">{{Citation

|last1=van der Wijngaart|first1=R.

|last2=Jin|first2=H.