On Thu, 2004-10-07 at 13:12, Hubertus Franke wrote:
> The way this is heading is quite promising.
> - sched_domains seems the right answer wrt to partitioning the machine.
> Given some boot option or dynamic means one can shift cpus from
> on domain to the next domain.
> - If I understood correctly, there would be only one level of such
> hard partitioning, speak exclusive cpu-set or sched_domain.
> - In each such domain/set we allow shared *use*.
I don't think that there needs to be a requirement that we have only one
level of hard partitioning. The rest of your points are valid though,
Hubertus.
It'd be really nice if we could all get together with a wall of
whiteboards, some markers, and a few pots of coffee. I think we'd all
get this pretty much hashed out in an hour or two. This isn't directed
at you, Hubertus, but at the many communication breakdowns in this
thread.
> First, one needs to understand that sched_domains are nothing else
> but a set of cpus that are considered during load balancing times.
> By constricting the top_domain to the respective exclusive set one
> essentially has accomplished the desired feature of partitioning
> the machines into "isolated" sections (here from cpu perspective).
> So it is quite possible that an entire domain is empty based, while
> another exclusive domain would be totally overloaded.
I think that is very well stated, Hubertus. By having a more or less
passive data structure that is only checked at load balance time, we can
ensure (in a very light-weight way) that no task ever moves *out* of
it's area nor moves *into* someone else's area.
-Matt
--On Friday, October 08, 2004 05:22:10 PM -0700 Matthew Dobson <[email protected]> wrote:
>
> It'd be really nice if we could all get together with a wall of
> whiteboards, some markers, and a few pots of coffee. I think we'd all
> get this pretty much hashed out in an hour or two. This isn't directed
I can easily set up another conference call if you all want. You can also
use the #lse channel on irc.oftc.net for talking about this.
Let me know.
Hanna
On Tue, 2004-10-12 at 15:24, Hanna Linder wrote:
> --On Friday, October 08, 2004 05:22:10 PM -0700 Matthew Dobson <[email protected]> wrote:
> >
> > It'd be really nice if we could all get together with a wall of
> > whiteboards, some markers, and a few pots of coffee. I think we'd all
> > get this pretty much hashed out in an hour or two. This isn't directed
>
> I can easily set up another conference call if you all want. You can also
> use the #lse channel on irc.oftc.net for talking about this.
>
> Let me know.
>
> Hanna
When Paul gets back from his forced sabbatical we may well take you up
on this.
Thanks!
-Matt