adk9 / npb2.3-omp-c

NPB OpenMP C

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========================================== These are serial versions of the NPB2.3 suite. All previous evidence of parallelism has been removed from the codes. These versions are intended to be starting points for the development of both shared memory and distributed memory versions, for the testing parallelization tools, and also as single processor benchmarks. New to the NPB2.3 and NPB2.3-serial suites is the inclusion of a Class W size, which all run in about 20 Mb of memory, and are intended to be used on workstations or PC’s.

NOTE: Please see the very important “IS/README.carefully” in the IS directory before using this code. NOTE: Please see the very important “CG/README.carefully” in the CG directory before using this code. ========================================== INSTALLATION

For documentation on installing and running the NAS Parallel Benchmarks, refer to subdirectory Doc.

========================================== BACKGROUND

Information on NPB 2.3b2, including the technical report, the original specifications, source code, results and information on how to submit new results, is available at:

http://www.nas.nasa.gov/NAS/NPB/

Send comments or suggestions to [email protected] Send bug reports to [email protected]

NAS Parallel Benchmarks Group NASA Ames Research Center Mail Stop: T27A-1 Moffett Field, CA 94035-1000

E-mail: [email protected] Fax: [phone]

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NPB 2.X PLANS

The NAS Parallel Benchmark 2 Team plans a staged release of modified and new benchmarks in the coming months. These new releases correct deficiencies in the preliminary release, 2.0. We do not intend to make more releases beyond those mentioned here unless there is a substantial problem.

Summary of (planned) releases:

2.1 New LU and BT. 2.2 - IS in C.

• EP.
• New FT with a 2-D decomposition, plus additional optimizations.

2.3 CG Benchmark.

Status of NPB 2.3 codes:

• We consider SP, BT, LU, MG EP, FT, and IS completely stable
• CG is now in “Beta” release.

The accompanying report specifies the CLASS C test cases for both NPB 1.0 and NPB 2.x, including verification numbers.

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Changes in 2.3

• Added CG

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Changes in 2.2

• Added IS in C
• Modified FT so that it can be run on a number of processors larger than the last array dimension
• Added EP
• Encoded CLASS C size and verification numbers
• Removed include file mpifrag.f containing executable statements
• Added different versions of random number generators

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Changes in 2.1

• Modified SP to report more accurate flop count
• Modified BT to report correct flop count (bt.f)
• Modified BT (x_solve.f) 5x5 block tridiagonal routine are unrolled
• Modified LU routines blts.f and buts.f to do column based relaxation (rather than diagonal based), and routine exchange_1.f to communicate at edges of processor (rather than at ends of each subsequent diagonal). Result is significantly less communication.
• Modified LU routines blts.f and buts.f by unrolling the loops of the 5x5 block tridiagonal sections.
• Added comments in config/NAS examples
• Removed an unnecessary echo from sys/make.common
• Added mail and email address for benchmark output in print_results.f

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