Galactos

Computational Engineering, Finance, and Science (cs.CE) Performance (cs.PF) FOS: Computer and information sciences Computer Science - Performance Cosmology and Nongalactic Astrophysics (astro-ph.CO) FOS: Physical sciences Computer Science - Computational Engineering, Finance, and Science Astrophysics - Cosmology and Nongalactic Astrophysics
DOI: 10.1145/3126908.3126927 Publication Date: 2017-11-08T21:02:30Z
ABSTRACT
The nature of dark energy and the complete theory gravity are two central questions currently facing cosmology. A vital tool for addressing them is 3-point correlation function (3PCF), which probes deviations from a spatially random distribution galaxies. However, 3PCF's formidable computational expense has prevented its application to astronomical surveys comprising millions billions We present Galactos, high-performance implementation novel, O(N2) algorithm that uses load-balanced k-d tree spherical harmonic expansions compute anisotropic 3PCF. Our optimized Intel Xeon Phi architecture, exploiting SIMD parallelism, instruction thread concurrency, significant L1 L2 cache reuse, reaching 39% peak performance on single node. Galactos scales full Cori system, achieving 9.8 PF (peak) 5.06 (sustained) across 9636 nodes, making 3PCF easily computable all galaxies in observable universe.
SUPPLEMENTAL MATERIAL
Coming soon ....
REFERENCES (37)
CITATIONS (5)
EXTERNAL LINKS
PlumX Metrics
RECOMMENDATIONS
FAIR ASSESSMENT
Coming soon ....
JUPYTER LAB
Coming soon ....