On Wed, Oct 14, 2015 at 05:42:09PM +0900, [email protected] wrote: > +static inline void set_task_rq(struct task_struct *p, unsigned int cpu) > +{ > + const struct sched_class *class; > + > + for_each_class(class) { > + if (class->set_task_rq) > + class->set_task_rq(p, cpu); > + } > +}
So I worry about this, because the class structures are not all in the same translation unit, GCC cannot (without -fwhole-program) optimize that all away. This means we'll do 5 cacheline loads and 2 indirect calls, on _every_ cpu migration. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
