The International Conference for High Performance Computing, Networking, Storage, and Analysis
The International Conference for High Performance Computing, Networking, Storage, and Analysis
Workshop: 9th International Workshop on Software Correctness for HPC Applications (Correctness '25)
Authors: Esteban M. Rangel (Argonne National Laboratory (ANL)) and S. John Pennycook (Intel Corporation)
Abstract: We present early work towards establishing an automated workflow for numerical error analysis of SYCL kernels. The method leverages the OpenCL Intercept Layer to record the execution of GPU-targeted SYCL kernels and replay them with CPU runtimes, enabling detailed floating-point error evaluation without modifying the original application. We analyze the force kernel from a large-scale cosmology application code (HACC) using PoCL and Verificarlo, exploring both IEEE-compliant configurations and reduced-precision modes (\eg, FP16, TF32, BF16), as well as the effects of the \texttt{-ffast-math} compiler optimization using stochastic arithmetic via MCA and PRISM. By leveraging open tools and standards, this work contributes a reusable path toward broader adoption of numerical accuracy evaluation in HPC.
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