Energy efficient HPC on embedded SoCs : optimization techniques for mali GPU
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Document typeConference report
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Rights accessRestricted access - publisher's policy
A lot of effort from academia and industry has been invested in exploring the suitability of low-power embedded technologies for HPC. Although state-of-the-art embedded systems-on-chip (SoCs) inherently contain GPUs that could be used for HPC, their performance and energy capabilities have never been evaluated. Two reasons contribute to the above. Primarily, embedded GPUs until now, have not supported 64-bit floating point arithmetic - a requirement for HPC. Secondly, embedded GPUs did not provide support for parallel programming languages such as OpenCL and CUDA. However, the situation is changing, and the latest GPUs integrated in embedded SoCs do support 64-bit floating point precision and parallel programming models. In this paper, we analyze performance and energy advantages of embedded GPUs for HPC. In particular, we analyze ARM Mali-T604 GPU - the first embedded GPUs with OpenCL Full Profile support. We identify, implement and evaluate software optimization techniques for efficient utilization of the ARM Mali GPU Compute Architecture. Our results show that, HPC benchmarks running on the ARM Mali-T604 GPU integrated into Exynos 5250 SoC, on average, achieve speed-up of 8.7X over a single Cortex-A15 core, while consuming only 32% of the energy. Overall results show that embedded GPUs have performance and energy qualities that make them candidates for future HPC systems
CitationGrasso, I. [et al.]. Energy efficient HPC on embedded SoCs : optimization techniques for mali GPU. A: IEEE International Parallel and Distributed Processing Symposium. "IEEE 28th International Parallel and Distributed Processing Symposium (IPDPS 2014): proceedings: Phoenix, Arizona, USA: 19-23 May 2014". Phoenix: Institute of Electrical and Electronics Engineers (IEEE), 2014, p. 123-132.
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