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FLASH 1.0: A Software Framework for Rapid Parallel Deployment and Enhancing Host Code Portability in Heterogeneous Computing
Michael Riera, Masudul Hassan Quraishi, Erfan Bank Tavakoli, Fengbo Ren
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This paper presents FLASH 1.0, a C++-based software framework for rapid parallel deployment and enhancing host code portability in heterogeneous computing. FLASH takes a novel approach in describing kernels and dynamically dispatching them in a hardware-agnostic manner. FLASH features truly hardware-agnostic frontend interfaces, which unify the compile-time control flow and enforce a portability-optimized code organization that imposes a demarcation between computational (performance-critical) and functional (non-performance-critical) codes as well as the separation of hardware-specific and hardware-agnostic codes in the host application. We use static code analysis to measure the hardware independence ratio of twelve popular HPC applications and show that up to 99.72% code portability can be achieved with FLASH. Similarly, we measure and compare the complexity of state-of-the-art portable programming models to show that FLASH can achieve a code reduction of up to 4.0x for two common HPC kernels while maintaining 100% code portability with a normalized framework overhead between 1% - 13% of the total kernel runtime. The codes are available at https://github.com/PSCLab-ASU/FLASH.
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