Occamy: A 432-Core 28.1 DP-GFLOP/s/W 83% FPU Utilization Dual-Chiplet, Dual-HBM2E RISC-V-Based Accelerator for Stencil and Sparse Linear Algebra Computations with 8-to-64-bit Floating-Point Support in 12nm FinFET
Gianna Paulin, Paul Scheffler, Thomas Benz, Matheus Cavalcante, Tim Fischer, Manuel Eggimann, Yichao Zhang, Nils Wistoff, Luca Bertaccini, Luca Colagrande, Gianmarco Ottavi, Frank K. Gürkaynak, Davide Rossi, Luca Benini
Abstract
We present Occamy, a 432-core RISC-V dual-chiplet 2.5D system for efficient sparse linear algebra and stencil computations on FP64 and narrow (32-, 16-, 8-bit) SIMD FP data. Occamy features 48 clusters of RISC-V cores with custom extensions, two 64-bit host cores, and a latency-tolerant multi-chiplet interconnect and memory system with 32 GiB of HBM2E. It achieves leading-edge utilization on stencils (83%), sparse-dense (42 %), and sparse-sparse (49 %) matrix multiply.
Topics & Concepts
StencilDual (grammatical number)Parallel computingLinear algebraComputer scienceComputationComputational scienceMulti-core processorCore (optical fiber)MathematicsAlgorithmTelecommunicationsLiteratureArtGeometryAdvancements in Semiconductor Devices and Circuit DesignAnalog and Mixed-Signal Circuit DesignLow-power high-performance VLSI design