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Re: [Xen-devel] [PATCH 03 of 10 v2] xen: sched_credit: let the scheduler know about node-affinity



Am 20.12.2012 09:33, schrieb Dario Faggioli:
On Thu, 2012-12-20 at 08:25 +0000, Juergen Gross wrote:
BTW, can you be a little bit more specific about where you're suggesting
to put it? I'm sorry but I'm not sure I figured what you mean by "the
scheduler private per-pcpu area"... Do you perhaps mean making it a
member of `struct csched_pcpu' ?

Yes, that's what I would suggest.

Ok then, functionally, that is going to be exactly the same thing as
where it is right now, i.e., a set of global per_cpu() variables. It is
possible for your solution to bring some cache/locality benefits,
although that will very much depends on single cases, architecture,
workload, etc.

The space is only allocated if sched_credit is responsible for the pcpu.


Juergen

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Juergen Gross                 Principal Developer Operating Systems
PBG PDG ES&S SWE OS6                   Telephone: +49 (0) 89 3222 2967
Fujitsu Technology Solutions              e-mail: juergen.gross@xxxxxxxxxxxxxx
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D-80807 Muenchen                 Company details: ts.fujitsu.com/imprint.html

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