On Fri, Apr 03, 2015 at 09:03:48AM +0800, huang ying wrote:
> On Thu, Apr 2, 2015 at 3:54 PM, Peter Zijlstra <pet...@infradead.org> wrote:
>
> > On Thu, Apr 02, 2015 at 09:06:09AM +0800, Huang Ying wrote:
> > > FYI, we noticed the below changes on
> > >
> > > git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/linux.git
> > timer/alloc_tvec_statically
> > > commit 17cdf560f2727f687ab159707d0aa591f8a2f82d ("timer: Allocate
> > per-cpu tvec_base's statically")
> > >
> > >
> > > testbox/testcase/testparams: lkp-sbx04/boot/performance-1
> > >
> > > c5e77f5216abdd1d 17cdf560f2727f687ab159707d
> > > ---------------- --------------------------
> > > %stddev %change %stddev
> > > \ | \
> > > 410996 ± 0% +4.0% 427412 ± 0% boot-meminfo.VmallocUsed
> > >
> > > testbox/testcase/testparams: wsm/boot/performance-1
> > >
> > > c5e77f5216abdd1d 17cdf560f2727f687ab159707d
> > > ---------------- --------------------------
> > > 85712 ± 0% +2.4% 87772 ± 0% boot-meminfo.VmallocUsed
> > >
> > > testbox/testcase/testparams: lkp-snb01/boot/performance-1
> > >
> > > c5e77f5216abdd1d 17cdf560f2727f687ab159707d
> > > ---------------- --------------------------
> > > 447001 ± 0% -1.0% 442558 ± 0% boot-slabinfo.num_objs
> > > 125616 ± 5% -13.5% 108720 ± 4% boot-meminfo.DirectMap4k
> > > 347196 ± 0% +4.7% 363612 ± 0% boot-meminfo.VmallocUsed
> > >
> >
> > well, duh.. it changes a dynamic allocation into a static per-cpu one.
> > What did you expect?
> >
>
> Just FYI. This may be the expected behavior. If so, you have a third
> party test report.
Ah ok. I thought you thought it was a bug/regression.
Thanks
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