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by khuey
19 days ago
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> The point is that with RSEQ, you can write a _different_ algorithm that's faster than an implementation relying on hardware mediated MESI. Even without rseq(2) you're looking at a "different algorithm". For one, a proper userspace mutex allows the excluded threads to be descheduled and the core can be repurposed to run other tasks, rather than hammering away at the contended cache line. |
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