29 Dec
2017
29 Dec
'17
9:59 p.m.
On Thu, 28 Dec 2017 17:16:40 -0500
Paul Davis <paul(a)linuxaudiosystems.com> wrote:
On Thu, Dec 28, 2017 at 2:11 PM, Jeremy Henty
<onepoint(a)starurchin.org>
wrote:
This is proving to be quite fascinating, so thanks everyone for jumping on
board and contributing.
I won't say the mists have cleared, but they certainly seem a lot thinner :)
--
Will J Godfrey
http://www.musically.me.uk
Say you have a poem and I have a tune.
Exchange them and we can both have a poem, a tune, and a song.
Will Godfrey wrote:
AFAIK, NUMA is dead for everything except a few research systems.
Parallel/multi-processor systems these days are all "symmetric" (all
processors have symmetrical access to all memory).
NUMA is really, really, really hard to get right. Why? Cache invalidation.
Several companies, organizations, etc. have tried. Last time I looked (and
it has been a while, but I was quite involved with this stuff in the mid
1990s), everybody failed.
If I've understood that correctly you can
also ensure that they are
also on the same socket, which apparently improves memory access.
I think this is what is meant by NUMA (Non-Uniform Memory access).