511.povray_r
SPEC CPU2017 Benchmark Description

Benchmark Name

511.povray_r

Benchmark Author

Thorsten Fröhlich <thorsten [at] trf.de>

Chris Cason <spec001 [at] povray.org>

Benchmark Program General Category

Computer Visualization / Raytracing

Benchmark Description

POV-Ray is a free and open source ray-tracing application. The CPU2017 version is based on POV-Ray version 3.7.

Input Description

The benchmark's input consists of:

• An ASCII text POV-Ray parameters (.ini) file. The included .ini file specifies the name of the input geometry file, the output log file, and the output image file name.
• A POV-Ray scene description language (.pov) geometry file. The input geometry file represents a chess board scene constructed in the POV-Ray scene description language.

Output Description

The benchmark renders a 2560 x 2048 pixel image of a chess board, with the pieces placed on the board in the starting position. The rendered scene image is saved as a Targa (.tga) file.

This output image is compared with the reference output image using the SPEC utility imagevalidate, which calculates a the structural similarity (SSIM) index between corresponding 8x8 groups of pixels in each image. The SSIM index has a range of -1 (maximal difference) to 1 (identical). The benchmark requires that all computed SSIM indices be greater than 0.996 in order for the run to be considered successful.

A log of the execution is also generated, but its contents are not used to validate correction operation of the benchmark.

Programming Language

ISO C++

Threading Model

None

Known portability issues

• Users of the Intel^® Compiler on Windows may get the mathimf.h and direct.h header files included by defining the SPEC_WINDOWS_ICL preprocessor macro.

Sources and Licensing

POV-Ray (which became 511.povray_r) was contributed to CPU2017 by one of the developers, Thorsten Froehlich, under the GNU Affero License v3.

Please see details in the document SPEC CPU2017 Licenses.

References

• Persistence of Vision Raytracer home page: http://www.povray.org/
• Structural Similarity: https://en.wikipedia.org/wiki/Structural_similarity

Last updated: $Date: 2017-05-01 13:34:29 -0400 (Mon, 01 May 2017) $