Cohort: Software-Oriented Acceleration for You, Me, and Our Heterogeneous SoCs
summary
Cohort is a platform that exposes accelerators through a uniform high-performance shared memory queues API plus a per-accelerator hardware wrapper that translates addresses and watches cache invalidations. Prototype integrates with OpenPiton RISC‑V Linux tiles, provides a single Linux driver, and targets peer CPU↔accelerator and accelerator↔accelerator communication. Measured speedups range from 1.8–8.4× over MMIO baseline and 1.6–11× over coherent DMA using batching, and the design is open source and FPGA‑validated.
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chapters (10)
- 0:00Cohort introduction
- 1:21Hardware acceleration challenges
- 3:30Cohort solution overview
- 5:16Implementation details
- 7:03Software API demo
- 8:28Performance improvements
- 9:50Comparison with approaches
- 10:33Open-source and conclusion
- 10:55Q&A on overhead
- 11:37RISC-V SIGSoft efforts
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