[Cake] new 12 core box

[Pete Heist]

> On Dec 2, 2017, at 11:10 PM, Dave Taht <dave.taht at gmail.com> wrote:
> 
> Linux spaceheater 4.15.0-rc1-cake-5 #1 SMP PREEMPT Sat Dec 2 12:50:23
> PST 2017 x86_64 x86_64 x86_64 GNU/Linux
> 
> I had all kinds of trouble trying to install anything later than
> ubuntu 16.04.3 on it.
> 
> A kernel build still took an hour, and it turns out that time is
> dominated by the single threaded debian packager, where less cores at
> more clock would help. Still have time for naps, except that it's so
> loud to require earplugs.

I like the name. “dornierdox” doesn’t have the same smooth ring: https://en.wikipedia.org/wiki/Dornier_Do_X <https://en.wikipedia.org/wiki/Dornier_Do_X> (Powerplant: 12× Curtiss Conqueror water-cooled V12) Who decides to build that?

I still think a box like that will be useful for veth testing.

I’ve been really happy with the 2x APU2 you suggested, for their four cores and silence. I even think 2-3 more of them could be useful for different testing topologies as we discussed. Next time though, I won’t futz around when attaching the heat spreader, just fix the thermal adhesive, mount it to the board straight away and be careful not to twist anything. First attempt: apu2a. Got it right: apu2b. The second box is consistently 5C cooler, though both are well within spec, usually under 65C under full load.

sysadmin at apu2a:~$ sensors
k10temp-pci-00c3
temp1:        +52.4°C  (high = +70.0°C)
                       (crit = +105.0°C, hyst = +104.0°C)

sysadmin at apu2b:~$ sensors
k10temp-pci-00c3
temp1:        +46.6°C  (high = +70.0°C)

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