Re: [Lse-tech] NUMA scheduling

[Peter Rival <frival@zk3.dec.com>]

Ditto.  Maybe I'll even get a chance to check it out on an EV7. ;)

 - Pete

Jesse Barnes wrote:

> On Fri, Feb 22, 2002 at 10:56:06AM -0800, Mike Kravetz wrote:
> > Below is preliminary patch to implement some form of NUMA scheduling
> > on top of Ingo's K3 scheduler patch for 2.4.17.  This is VERY early
> > code and brings up some issues that need to be discussed/explored in
> > more detail.  This patch was created to form a basis for discussion,
> > rather than as a solution.  The patch was created for the i386 based
> > NUMA system I have access to.  It will not work on other architectures.
> > However, the only architecture specific code is a call to initialize
> > some of the NUMA specific scheduling data structures.  Therefore, it
> > should be trivial to port.
>
> Ah, you beat me to it; I was working on code very similar to this when
> I got your e-mail.  I think this sort of thing will address the
> problem we've been seeing on machines with more than 16 cpus or so
> (IDLE_REBALANCE_TICK is too small, flooding CPUs with load_balance
> requests), as well as making numa scheduling a little more efficient.
> I'll see if I can make it work on our platform and let you know how it
> goes.
>
> Jesse
>
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