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Experience with the alpaka performance portability library in the CMS software

Conference · · EPJ Web Conf.
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  1. CERN
  2. Rice U.
  3. UC, San Diego
  4. MIT
  5. Fermilab
  6. CERN; Abomey-Calavi U.
  7. CERN; RWTH Aachen U.
  8. CERN; Vilnius U.
+ Show Author Affiliations
ion Library for Parallel Kernel Acceleration) is a header-only C++ library that provides performance portability across different back-ends, abstracting the underlying levels of parallelism. It supports serial and parallel execution on CPUs, and extremely parallel execution on NVIDIA, AMD and Intel GPUs.This contribution will show how alpaka is used in the CMS software to develop and maintain a single code base; to use different toolchains to build the code for each supported back-end, and link them into a single application; to seamlessly select the best backend at runtime, and implement portable reconstruction algorithms that run efficiently on CPUs and GPUs from different vendors. It will describe the validation and deployment of the alpaka-based implementation in the CMS High Level Trigger, and highlight how it achieves near-native performance.
Research Organization:
Vilnius U.; UC, San Diego; CERN; MIT; RWTH Aachen U.; Abomey-Calavi U.; Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Rice U.
Sponsoring Organization:
US Department of Energy
DOE Contract Number:
89243024CSC000002
OSTI ID:
2998984
Report Number(s):
FERMILAB-CONF-25-0145-CMS-CSAID; oai:inspirehep.net:3065570
Conference Information:
Journal Name: EPJ Web Conf.
Country of Publication:
United States
Language:
English

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