Re: Someone installed an aarch64 Christmas gift: There is now a ampere4 with 150 or so FreeBSD CPUs and 24 builders running in parallel [an ampere5 exists too]

On Mon, 29 Dec 2025, at 22:37, Mark Millard wrote:
> Philip Paeps <philip_at_freebsd.org> wrote on
> Date: Mon, 29 Dec 2025 13:03:38 UTC :
>
>> On 2025-12-29 18:14:11 (+0800), Ronald Klop wrote:
>> > Do you have some info about the new ampere4 and ampere5 servers? Maybe some tech specs and the expected use cases.
>> 
>> ampere4 and ampere5 are obscenely deep 2U machines that have been sitting in storage for a while because we didn't have racks that could accommodate them.
>> 
>> They're both Ampere Mt Collins machines.
>
> So much for my earlier guessing.
>
> QUOTE from Ampere_Mt._Collins_2U_PB_v0.50_20210223.pdf :
> Available in a dual socket configuration in a 2U form-factor with the 
> Ampere Altra®
> and Altra® Max processors, Mt. Collins provides 160 cores . . .
> END QUOTE
>
> If I understand right, that means armv7 user space code likely is
> supported (Altra variants).
>
> "8x 72-bit DDR4-3200 channels" and "Up to 16 DIMMs and 4 TB/socket".
> (2 DIMMs per channel are allowed.)
>
>> Two CPUs each, for 160 cores per machine. There's 256G memory in ampere4 (16*16G) and 128G in ampere5 (8*32G).

Thanks Santa!

I’ll be interested to see how fast these eat ports for breakfast…

In my much smaller ports setup, I found I needed about 4Gb RAM per core at peak usage, but also these were using tmpfs for everything.

A+
Dave