437cb3ded2
CID management OR's two cpumasks and then calculates the weight on the result. That's inefficient as that has to walk the same stuff twice. As this is done with runqueue lock held, there is a real benefit of speeding this up. Depending on the system this results in 10-20% less cycles spent with runqueue lock held for a 4K cpumask. Provide cpumask_weighted_or() and the corresponding bitmap functions which return the weight of the OR result right away. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Yury Norov (NVIDIA) <yury.norov@gmail.com> Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Link: https://patch.msgid.link/20251119172549.448263340@linutronix.de |
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