[RndTbl] Ryzen latency (was: Reddit - networking - Can a BSD system replicate the performance of high-end router appliance?)

Kevin McGregor kevin.a.mcgregor at gmail.com
Fri Nov 17 15:34:28 CST 2017

We may want to wait until general retail availability of Epyc (and
reasonably-prices workstation boards) to get reliable ECC. Sigh. Good thing
I'm not in a rush, tempting though Ryzen is.

And I just bought a house, so PC upgrades suddenly aren't as high on my
priority list.

On Thu, Nov 16, 2017 at 11:53 PM, Trevor Cordes <trevor at tecnopolis.ca>

> On 2017-11-16 Kevin McGregor wrote:
> > The question is, which (types of) applications have sucky performance
> > specifically because of this? It may be a perfectly reasonable design
> > choice for some/many use cases.
> Possibly.  Adam's article actually c&p'ed the ryzen paragraphs from
> other (game-centric) ryzen articles (or vice-versa?).
> However, none of the articles I read tell me what the upside is... they
> just list the downside (latency).  I assume AMD chose bandwidth over
> latency, so one would hope the bw would be much higher on ryzen to
> compensate for latency.  Then your app will dictate whether ryzen or
> xeon is better.
> As Adam said, one would hope AMD made this design decision on purpose,
> rather than as a mistake.  As a mistake, think lack of barrel shifter
> on P4's.  No one said chip designers are perfect... so I wouldn't be
> too surprised either way.
> I stopped caring about that "last tiny bit of performance" about 10
> years ago.  If my next workstation is around 8X faster than my current
> one for my workload, then I don't really care if it is actually 7X or
> 9X, as long as the price is semi-affordable.  And I get ECC.  And I get
> a x16/x16 slot for discrete graphics.
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