On 06/29/2014 02:06 PM, Tom Lane wrote:
> Well, the issue from our point of view is that a lot of what we care about
> testing is extremely low-level hardware behavior, like whether spinlocks
> work as expected across processors. It's not clear that a simulator would
> provide a sufficiently accurate emulation.
Oh ok, I understand. Thank you for the clarification.
> OTOH, the really nasty issues like cache coherency rules don't arise in
> single-processor systems. So unless you have a multiprocessor VAX
> available to spin up, a simulator may tell us as much as we'd learn
> (If you have got one, maybe some cash could be found --- we do have
> project funds available, and I think they'd be well spent on testing
> purposes. I don't make those decisions though.)
I have several multiprocessor VAXen, but only one of them is capable
of running NetBSD, and I only (currently) have a single processor in
that machine. I can (and want to) fix that, but not right away.
Dave McGuire, AK4HZ/3
New Kensington, PA
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