Re: [RFC] generalise scheduling classes

[Nick Piggin]

bill davidsen wrote:

> In article <3FC0A0C2.90800@xxxxxxxxxxxxxxx>,
> Nick Piggin  <piggin@xxxxxxxxxxxxxxx> wrote:
>
> | We still don't have an HT aware scheduler, which is unfortunate because
> | weird stuff like that looks like it will only become more common in future.
>
> The idea is hardly new, in the late 60's GE (still a mainframe vendor at
> that time) was looking at two execution units on a single memory path.
> They decided it would have problems with memory bandwidth, what else is
> new?

I don't think I said new, but I guess they (SMT, NUMA, CMP) are newish
for architectures supported by Linux Kernel. OK NUMA has been around for
a while, but the scheduler apparently doesn't work so well for atypical
new NUMAs like Opteron.


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