Heterogeneous Ultra-Low-Power RISC-V SoC Running Linux


A technical paper titled “HULK-V: a Heterogeneous Ultra-low-power Linux capable RISC-V SoC” was published by researchers at University of Bologna, University of Modena and Reggio Emilia, and ETH Zurich.

“We present HULK-V: an open-source Heterogeneous Linux-capable RISC-V-based SoC coupling a 64-bit RISC-V processor with an 8-core Programmable Multi-Core Accelerator (PMCA), delivering up to 13.8 GOps, up to 157 GOps/W and accelerating the execution of complex DSP and ML tasks by up to 112x over the host processor. HULK-V leverages a lightweight, fully digital memory hierarchy based on HyperRAM IoT DRAM that exposes up to 512 MB of DRAM memory to the host CPU. Featuring HyperRAMs, HULK-V doubles the energy efficiency without significant performance loss compared to featuring power-hungry LPDDR memories, requiring expensive and large mixed-signal PHYs. HULK-V, implemented in Global Foundries 22nm FDX technology, is a fully digital ultra-low-cost SoC running a 64-bit Linux software stack with OpenMP host-to-PMCA offload within a power envelope of just 250 mW,” states the paper.

Find the technical paper here. Published November 2022.

Valente, Luca, et al. “HULK-V: a Heterogeneous Ultra-low-power Linux capable RISC-V SoC.” arXiv preprint arXiv:2211.14944 (2022).

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