On Fri, Jul 11, 2014 at 1:54 PM, Jason Baron <[email protected]> wrote: > If 'arat' is set in the cpuflags, we can avoid the checks for entering/exiting > the tick broadcast code entirely. It would seem that this is a hot enough code > path to make this worthwhile. I ran a few hackbench runs, and consistenly see > reduced branches and cycles.
Hi Jason, Your logic looks right -- though I've never used this static_key_slow_inc() stuff. I'm impressed that something in user-space could detect this change. Can you share how to run the workload where you detected a difference, and describe the hardware you measured? thanks, -Len Brown, Intel Open Source Technology Center -- 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/
