> I assume he means MAP_POPULATE Yes.
> > which does improve things, from ~3000 cycles to ~219 cycles but that's > still more overhead than the ~130 or so you get by manually touching the > page first. That seems odd. It should be the same. Can you do a trace-cmd function trace and compare the two cases? trace-cmd record -p function_graph ... trace-cmd report (as usual for tracing perf remove the useless -pg removal for perf in kernel/events/Makefile and arch/x86/kernel/cpu/Makefile first) -Andi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
