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In Reconfigurable Systems-On-Chip (RSoCs), operating systems can primarily (1) manage the sharing of limited reconfigurable resources, and (2) support communication between reconfigurable accelerators and user applications. It has been shown in previous work that the operating system can dramatically simplify the interface to reconfigurable coprocessors and isolate the programmer from all details...
Although naturally belonging to the user process, hardware parts of codesigned reconfigurable applications execute outside of the operating system (OS) process: they have neither unified memory abstraction with software nor system services provided by the OS. This imposes limitations on hardware and software interfacing, narrows available programming paradigms, and affects application portability...
The performance of virtual machines (e.g., Java Virtual Machines---JVMs) can be significantly improved when critical code sections (e.g., Java bytecode methods) are migrated from software to reconfigurable hardware. In contrast to the compile-once-run-anywhere concept of virtual machines, reconfigurable applications lack portability and transparent SW/HW interfacing: applicability of accelerated hardware...
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