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DAC
2006
ACM

Rapid and low-cost context-switch through embedded processor customization for real-time and control applications

10 years 29 days ago
Rapid and low-cost context-switch through embedded processor customization for real-time and control applications
In this paper, we present a methodology for low-cost and rapid context switch for multithreaded embedded processors with realtime guarantees. Context-switch, which involves saving and restoring the thread state, has constituted not only a large performance overhead for many multithreaded embedded systems, but also an obstacle creating a significant delay in the response time for many time-critical control applications. The proposed technique exploits application information extracted during compile time to make sure that only a minimal amount of thread state is saved and subsequently restored on preemption. The register liveness within the application inner loops is analyzed and a few points, referred to as switch points, are identified where the program has minimal number of live registers. At run-time the preemption point is deferred to a switch point and the Real-Time Operating System (RTOS) kernel invokes a switch point specific code generated by the compiler to save and restore t...
Xiangrong Zhou, Peter Petrov
Added 13 Nov 2009
Updated 13 Nov 2009
Type Conference
Year 2006
Where DAC
Authors Xiangrong Zhou, Peter Petrov
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