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The authors present HybridOS, a set of operating system extensions for supporting fine-grained reconfigurable accelerators integrated with general-purpose computing platforms. HybridOS specifically targets the application integration, data movement and communication overheads for a CPU/accelerator model when running a commodity operating system. HybridOS provides a simple API for applications and a well-defined hardware interface for reconfigurable accelerators. The goal is to reduce the difficulty in mapping applications into a CPU/accelerator model compared to an unrestrained FPGA platform while achieving whole-application speedups.
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