Re: [announce] CFS-devel, performance improvements

Rob Hussey
2007-09-13T10:17:18Z

On 9/13/07, Rob Hussey <robjhussey@gmail.com> wrote:
> On 9/13/07, Rob Hussey <robjhussey@gmail.com> wrote:
> > On 9/13/07, Ingo Molnar <mingo@elte.hu> wrote:
> > >
> > > * Rob Hussey <robjhussey@gmail.com> wrote:
> > >
> > > > On 9/13/07, Ingo Molnar <mingo@elte.hu> wrote:
> > > > >
> > > > > thanks for the numbers! Could you please also post the .config you used?
> > > >
> > > > Sure, .config for 2.6.23-rc1 and 2.6.23-rc6 attached.
> > >
> > > thx! If you've got some time, could you perhaps re-measure with these
> > > disabled:
> > >
> > > CONFIG_SCHED_DEBUG=y
> >
> > Well, I was going over my config myself after you asked for me to post
> > it, and I thought to do the same thing. Except, disabling sched_debug
> > caused the same error as before:
> > In file included from kernel/sched.c:794:
> > kernel/sched_fair.c: In function 'task_new_fair':
> > kernel/sched_fair.c:857: error: 'sysctl_sched_child_runs_first'
> > undeclared (first use in this function)
> > kernel/sched_fair.c:857: error: (Each undeclared identifier is
> > reported only once
> > kernel/sched_fair.c:857: error: for each function it appears in.)
> > make[1]: *** [kernel/sched.o] Error 1
> > make: *** [kernel] Error 2
> >
> > It only happens with sched_debug=y. I take it back, it wasn't my fault :)
> >
> I'm trying the patches now to see if they help.
>
Current cfs-devel git compiles fine without sched_debug. Not sure how
I broke things, but I need some sleep. I know the 2.6.23-rc1 numbers
were good, but not sure about the others. I'll make the changes you
suggested, and get some new and hopefully good numbers for
2.6.23-rc6-cfs and 2.6.23-rc6-cfs-devel.