Re: [PATCH v2 10/12] Maintain preemptability count even for !CONFIG_PREEMPT kernels

Gleb Natapov
2009-11-30T10:58:12Z

On Mon, Nov 30, 2009 at 12:56:12PM +0200, Gleb Natapov wrote:
> On Tue, Nov 24, 2009 at 09:14:03AM -0600, Christoph Lameter wrote:
> > On Tue, 24 Nov 2009, Gleb Natapov wrote:
> >
> > > On Mon, Nov 23, 2009 at 11:30:02AM -0600, Christoph Lameter wrote:
> > > > This adds significant overhead for the !PREEMPT case adding lots of code
> > > > in critical paths all over the place.
> > > I want to measure it. Can you suggest benchmarks to try?
> >
> > AIM9 (reaim9)?
> Below are results for kernel 2.6.32-rc8 with and without the patch (only
> this single patch is applied).
>
Forgot to tell. The results are average between 5 different runs.

--
Gleb.