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Philippe Gerum authored
This routine is mainly intended as a tool for applications to implement LARTs, notably returning the isolation state of a CPU. This helps in detecting when a user is about to run out-of-band work on a non-isolated CPU. Although a dual kernel system performs significantly better than a native preemption system in this configuration, getting the smallest jitter and latency figures will require running the out-of-band load on an isolated core, so that the in-band work does not increase the rate of cache misses for the out-of-band duties.
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