Re: 2.6.12-rc6-mm1

["Martin J. Bligh" <mbligh@mbligh.org>]

--On Tuesday, June 07, 2005 17:08:53 -0700 Andrew Morton <akpm@osdl.org> wrote:

> Christoph Lameter <clameter@engr.sgi.com> wrote:
>> 
>> On Tue, 7 Jun 2005, Andrew Morton wrote:
>> 
>> > > Diffprofile is wacko (HZ seems to be defaulting to 250 in -mm).
>> > 
>> > Oh crap, so it does.  That's wrong.
>> 
>> Email by you and Linus indicated that 250 should be the default.
> 
> Oh, OK. hrm.
> 
> Martin, it would be useful if you could determine whether the kernbench
> slowdown was due to the 1000Hz->250Hz change, thanks.
> 
> I'm assuming it was the CPU scheduler patches.  There are 36 of them ;)

Backed them all out ... performance thunks down to earth again, and is actually
the best I've seen it ever (probably 250Hz is helping, I used to run 100 in 
-mjb for better benefit).

the +5081 item is the one to look at
http://ftp.kernel.org/pub/linux/kernel/people/mbligh/abat/perf/kernbench.moe.png

Patch I used was here:

http://ftp.kernel.org/pub/linux/kernel/people/mbligh/abat/patches/nosched

But it was just everything under the "CPU scheduler" section of your series
file.

M.