Re: [LAU] Bye Bye 32 bit

On Thu, 28 Dec 2017 17:16:40 -0500
Paul Davis <paul@linuxaudiosystems.com> wrote:

>On Thu, Dec 28, 2017 at 2:11 PM, Jeremy Henty <onepoint@starurchin.org>
>wrote:
>
>>
>> Will Godfrey wrote:
>>
>> > 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).
>>
>
>​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.​
>

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.
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