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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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