- LINPACK
LINPACK is a software library for performing numerical
linear algebra on digital computers. It was written inFortran byJack Dongarra , Jim Bunch,Cleve Moler , and Pete Stewart, and was intended for use onsupercomputer s in the 1970s and early 1980s. It has been largely superseded byLAPACK , which will run more efficiently on modern architectures.LINPACK makes use of the BLAS (Basic Linear Algebra Subprograms) libraries for performing basic vector and matrix operations.
The LINPACK Benchmarks are a measure of a system's
floating point computing power. Introduced by Jack Dongarra, they measure how fast a computer solves a dense "N" by "N"system of linear equations "Ax"="b", which is a common task inengineering . The solution is obtained byGaussian elimination with partial pivoting, with 2/3·"N"3 + 2·"N"2 floating point operations. The result is reported in millions of floating point operations per second (MFLOP/s, sometimes simply calledFLOPS ).For large-scale distributed-memory systems, [http://www.netlib.org/benchmark/hpl/ HPL] , a portable implementation of the High-Performance LINPACK Benchmark, is used as a performance measure for ranking supercomputers in the
TOP500 list of the world's fastest computers.(There is now also a Green500 list ranking the machines on the TOP500 list based on energy efficiency, in FLOPs per Watt.) The HPC benchmark is run for different matrix sizes "N" searching for the size Nmax for which the maximal performance Rmax is obtained. The benchmark also reports the problem size N1/2 where half of the performance (Rmax/2) is achieved.External links
* http://www.netlib.org/linpack/
* http://www.netlib.org/benchmark/hpl/
* http://www.netlib.org/blas/
* http://www.top500.org/ Top500
* http://www.netlib.org/benchmark/linpackjava/ a web-based LINPACK benchmark
* http://www.netlib.org/benchmark/hpl/ The HPL benchmark used in theTOP500
* [http://freespace.virgin.net/roy.longbottom/index.htm Source code, pre-compiled versions and results for PCs]
* http://www.green500.org/ Green500
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