Eliminating rwlocks and IRQF_DISABLED
Posted Dec 5, 2009 23:51 UTC (Sat) by smipi1 (subscriber, #57041)
Allowing interrupt handlers to be interrupted actually is far worse: It
introduces context switching overhead and screws up overall predictability.
If all interrupt handlers simply feed threads (that actually do the
associated work) without interruption, latencies can be tuned by design and
not by accident. Balancing throughput and latency simply becomes a question
of educating your scheduler.
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