If you don't want to get into the weeds on ECC again, please do not
reinitiate discussion. I do not agree that "the additional cost of ECC
is very low compared to the cost of developer time over the two years
that they're expected to use it", but I will restrict my disagreement
to the forked thread that you created. Please repost there.

On Tue, Nov 7, 2017 at 12:30 PM, Kris Maglione <kmagli...@mozilla.com> wrote:
> On Tue, Nov 07, 2017 at 03:07:55PM -0500, Jeff Muizelaar wrote:
>>
>> On Mon, Nov 6, 2017 at 1:32 PM, Sophana "Soap" Aik <s...@mozilla.com>
>> wrote:
>>>
>>> Hi All,
>>>
>>> I'm in the middle of getting another evaluation machine with a 10-core
>>> W-Series Xeon Processor (that is similar to the 7900X in terms of clock
>>> speed and performance) but with ECC memory support.
>>>
>>> I'm trying to make sure this is a "one size fits all" machine as much as
>>> possible.
>>
>>
>> What's the advantage of having a "one size fits all" machine? I
>> imagine there's quite a range of uses and preferences for these
>> machines. e.g some people are going to be spending more time waiting
>> for a single core and so would prefer a smaller core count and higher
>> clock, other people want a machine that's as wide as possible. Some
>> people would value performance over correctness and so would likely
>> not want ECC. etc. I've heard a number of horror stories of people
>> ending up with hardware that's not well suited to their tasks just
>> because that was the only hardware on the list.
>
>
> High core count Xeons will divert power from idle cores to increase the
> clock speed of saturated cores during mostly single-threaded workloads.
>
> The advantage of a one-size-fits-all machine is that it means more of us
> have the same hardware configuration, which means fewer of us running into
> independent issues, more of us being able to share software configurations
> that work well, easier purchasing and stocking of upgrades and accessories,
> ... I own a personal high-end Xeon workstation, and if every developer at
> the company had to go through the same teething and configuration troubles
> that I did while breaking it in, we would not be in a good place.
>
> And I don't really want to get into the weeds on ECC again, but the
> performance of load-reduced ECC is quite good, and the additional cost of
> ECC is very low compared to the cost of developer time over the two years
> that they're expected to use it.
>
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