The FMLP+: An Asymptotically Optimal Real-Time Locking Protocol for Suspension-Aware Analysis

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Provided by: Max-Planck-Gesellschaft
Topic: Hardware
Format: PDF
Multiprocessor real-time locking protocols that are asymptotically optimal under suspension-oblivious schedulability analysis (where suspensions are pessimistically modeled as processor demand) are known for partitioned, global, and clustered Job-Level Fixed Priority (JLFP) scheduling. However, for the case of more accurate suspension-aware schedulability analysis (where suspensions are accounted for explicitly), asymptotically optimal protocols are known only for partitioned JLFP scheduling. In this paper, the gap is closed with the introduction of the first semaphore protocol for suspension-aware analysis that is asymptotically optimal under global and clustered JLFP scheduling.
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