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Re: status of NetBSD SMP support
On Mon, Aug 08, 2016 at 07:36:05PM -0400, Thor Lancelot Simon wrote:
> > Last I remember anyone reporting hard results, the scaling worked to
> > ~16 but not to ~32 and the uvm page queue lock was the chief culprit.
> > Dunno what if anything's been done about that...
> There's a fragmentary discussion of it from around 2010 in the mailing list
> archives, but something must have been done as that particular limitation
> seems to have gone away. Our build cluster nodes run happily with 12
> cores, 24 threads, and I do not see the scaling issues we observed between
> 16 and 20 cores in my tests years ago.
In that case we definitely need someone to collect some hard numbers :-)
David A. Holland
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