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STREAM

On the record

Cache-sized data
STREAM is designed to use datasets much larger than available cache so results better reflect performance for large vector-style applications.cs.virginia.edu · read 5 Oct 2026
CLI or automation
Yescs.virginia.edu · read 22 Sep 2026
Comparison database
Yescs.virginia.edu · read 22 Sep 2026
Custom test profiles
Yescs.virginia.edu · read 22 Sep 2026
Intended use
It is designed to use datasets much larger than available cache, to make results more indicative of large vector style applications.cs.virginia.edu · read 5 Oct 2026
Kernels
The benchmark repeats four kernels: Copy, Scale, Add, and Triad.cs.virginia.edu · read 5 Oct 2026
Maintainer
The FAQ identifies John McCalpin as STREAM's creator and maintainer.cs.virginia.edu · read 5 Oct 2026
Operating systems
Linux; Windows; DOS; Power Maccs.virginia.edu · read 22 Sep 2026
Parallel runs
The standard C and Fortran code includes OpenMP directives, and an MPI version is available for cluster runs.cs.virginia.edu · read 5 Oct 2026
Project hosting
The site says STREAM is hosted at the University of Virginia in Charlottesville, Virginia.cs.virginia.edu · read 5 Oct 2026
Project status
The site describes STREAM as an independent academic project hosted at the University of Virginia.cs.virginia.edu · read 5 Oct 2026
Published results
Results labeled as standard STREAM benchmark results must conform to the STREAM Run Rules; modified or nonconforming runs must be clearly labeled.cs.virginia.edu · read 5 Oct 2026
Publishing results
Published results called “STREAM benchmark results” must conform to the run rules, and modified-code results must be clearly labelled.cs.virginia.edu · read 5 Oct 2026
Purpose
STREAM is a synthetic benchmark that measures sustainable memory bandwidth and computation rates for simple vector kernels.cs.virginia.edu · read 5 Oct 2026
Result export formats
comma-delimited raw data filescs.virginia.edu · read 22 Sep 2026
Results database
The site publishes benchmark results in tables covering bandwidth, machine balance, and equivalent MFLOPS.cs.virginia.edu · read 5 Oct 2026
Source code
The site recommends compiling the benchmark from its C or Fortran source code.cs.virginia.edu · read 5 Oct 2026
Source languages
The maker recommends compiling the source code, which is available in C or Fortran.cs.virginia.edu · read 5 Oct 2026

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