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Title: Clacc: Translating OpenACC to OpenMP in Clang

Abstract

OpenACC was launched in 2010 as a portable programming model for heterogeneous accelerators. Although various implementations already exist, no extensible, open-source, production-quality compiler support is available to the community. This deficiency poses a serious risk for HPC application developers targeting GPUs and other accelerators, and it limits experimentation and progress for the OpenACC specification. To address this deficiency, Clacc is a recent effort funded by the US Exascale Computing Project to develop production OpenACC compiler support for Clang and LLVM. A key feature of the Clacc design is to translate OpenACC to OpenMP to build on Clang's existing OpenMP compiler and runtime support. In this paper, we describe the Clacc goals and design. We also describe the challenges that we have encountered so far in our prototyping efforts, and we present some early performance results.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1489555
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: The Fifth Workshop on the LLVM Compiler Infrastructure in HPC (LLVM-HPC 2018) - Dallas, Texas, United States of America - 11/12/2018 5:00:00 AM-11/12/2018 5:00:00 AM
Country of Publication:
United States
Language:
English

Citation Formats

Denny, Joel, Lee, Seyong, and Vetter, Jeffrey S. Clacc: Translating OpenACC to OpenMP in Clang. United States: N. p., 2018. Web.
Denny, Joel, Lee, Seyong, & Vetter, Jeffrey S. Clacc: Translating OpenACC to OpenMP in Clang. United States.
Denny, Joel, Lee, Seyong, and Vetter, Jeffrey S. Thu . "Clacc: Translating OpenACC to OpenMP in Clang". United States. https://www.osti.gov/servlets/purl/1489555.
@article{osti_1489555,
title = {Clacc: Translating OpenACC to OpenMP in Clang},
author = {Denny, Joel and Lee, Seyong and Vetter, Jeffrey S.},
abstractNote = {OpenACC was launched in 2010 as a portable programming model for heterogeneous accelerators. Although various implementations already exist, no extensible, open-source, production-quality compiler support is available to the community. This deficiency poses a serious risk for HPC application developers targeting GPUs and other accelerators, and it limits experimentation and progress for the OpenACC specification. To address this deficiency, Clacc is a recent effort funded by the US Exascale Computing Project to develop production OpenACC compiler support for Clang and LLVM. A key feature of the Clacc design is to translate OpenACC to OpenMP to build on Clang's existing OpenMP compiler and runtime support. In this paper, we describe the Clacc goals and design. We also describe the challenges that we have encountered so far in our prototyping efforts, and we present some early performance results.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {11}
}

Conference:
Other availability
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