On Thu, May 03, 2007 at 08:53:47AM -0700, William Lee Irwin III wrote:
> On Thu, May 03, 2007 at 08:23:18PM +0530, Srivatsa Vaddagiri wrote:
> > And what about group scheduling extensions? Do you have plans to work on
> > it? I was begining to work on a prototype to do group scheduling based
> > on CFS, basically on the lines of what you and Linus had outlined
> > earlier:
> > http://lkml.org/lkml/2007/4/18/271
> > http://lkml.org/lkml/2007/4/18/244
>
> Tong Li's Trio scheduler does a bit of this, though it doesn't seem to
> have the mindshare cfs seems to have acquired.
>
> The hyperlink seems to have broken, though:
> http://www.cs.duke.edu/~tongli/linux/linux-2.6.19.2-trio.patch
The big question I have is, how well does DWRR fits into the "currently hot"
scheduling frameworks like CFS? For ex: if the goal is to do
fair (group) scheduling of SCHED_NORMAL tasks, can CFS and DWRR co-exist?
Both seem to be radically different algorithms and my initial impressions
of them co-existing is "No", but would be glad to be corrected if I am
wrong. If they can't co-exist, then we need a different way of doing
group scheduling on top of CFS, as that is gaining more popularity on
account of better handling of interactivity.
Tong,
I understand a center hallmark of DWRR is SMP fairness.
Have you considered how bad/good the other alternative to achieve SMP fairness
which is in vogue today : pressure/weight based balancing (ex: smpnice and
CKRM CPU scheduler - ckrm.sourceforge.net/downloads/ckrm-ols03-slides.pdf)?
--
Regards,
vatsa
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
