On Mon, May 19, 2014 at 10:59 PM, Jet Chen <jet.c...@intel.com> wrote:
> Hi Andy,
>
> FYI, we noticed the below changes on
>
> git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/vdso
> commit cfda7bb9ecbf9d96264bb5bade33a842966d1062 ("x86, vdso: Move syscall
> and sysenter setup into kernel/cpu/common.c")This is really strange. That change shouldn't have any effect except that some kernels might boot a cycle or two faster. > > test case: nhm4/will-it-scale/sched_yield > > 3d7ee969bffcc98 cfda7bb9ecbf9d96264bb5bad > --------------- ------------------------- > 5497021 ~ 0% +14.7% 6303424 ~ 0% TOTAL > will-it-scale.per_thread_ops > 0.54 ~ 0% +5.6% 0.57 ~ 0% TOTAL will-it-scale.scalability > 6209483 ~ 0% +1.6% 6305917 ~ 0% TOTAL > will-it-scale.per_process_ops > 2455 ~ 5% +16.9% 2870 ~ 5% TOTAL cpuidle.C1-NHM.usage > 8829 ~ 7% +15.2% 10169 ~10% TOTAL > slabinfo.kmalloc-64.active_objs > 24.13 ~12% +48.9% 35.93 ~14% TOTAL time.user_time > 393 ~ 0% -3.0% 382 ~ 1% TOTAL time.system_time > Is this a speedup or a slowdown? --Andy -- 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/
