Hello All!

Linux mx 5.15.63-gentoo-dist #1 SMP Thu Aug 25 12:40:44 -00 2022 x86_64 Intel(R) Xeon(R) CPU E5-2697 v4 @ 2.30GHz GenuineIntel GNU/Linux
Linux localhost 5.19.6-gentoo-dist #1 SMP PREEMPT_DYNAMIC Wed Aug 31 18:48:13 -00 2022 x86_64 AMD EPYC 7642 48-Core Processor AuthenticAMD GNU/Linux

fido.junc.eu runs on the last one :)

the first one is my current mailserver that will change to better hardware on 15 september


Regards Benny

... too late to die young :)

--- Msged/LNX 6.1.2 (Linux/5.19.6-gentoo-dist (x86_64))
* Origin: gopher://fido.junc.eu/ (2:230/0)

Hey Benny!

AMD EPYC 7642 48-Core Processor AuthenticAMD

You're going to need a 16K monitor methings. :::evil grin:::

Life is good,
Maurice

... Fidonet 4K - Sweet Sixteen Penguins of the Apocalypse.
--- GNU bash, version 5.1.16(1)-release (x86_64-znver2-linux-gnu)
* Origin: One of us @ (1:153/7001.2989)

Hello Maurice!

01 Sep 2022 19:25, Maurice Kinal wrote to Benny Pedersen:

AMD EPYC 7642 48-Core Processor AuthenticAMD

You're going to need a 16K monitor methings. :::evil grin:::

maybe time to redesign penguins on many cores :)


Regards Benny

... too late to die young :)

--- Msged/LNX 6.1.2 (Linux/5.19.6-gentoo-dist (x86_64))
* Origin: gopher://fido.junc.eu/ (2:230/0)

Hey Benny!

You're going to need a 16K monitor methings. :::evil grin:::

maybe time to redesign penguins on many cores :)

Using the screen height ought to help when boot penguins extend beyond the visible top row. 96 penguins will fit into 4 rows on a 4K monitor with room to spare (30 per row). It should also work on a 1080p monitor except will need at least 6 rows of boot penguins. Smaller than that I don't think there will be enough real estate to accomodate 96 penguins.

A 3D animation might be fun. :-)

Life is good,
Maurice

... Sprec ofter embe oðres monnes weldæde þonne emb ðine agna.
Speak more often about other people's good deeds than about your own.
--- GNU bash, version 5.1.16(1)-release (x86_64-znver1-linux-gnu)
* Origin: Little Mikey's EuroPoint @ (2:280/464.113)

Hello Benny!

01 Sep 22 12:08, you wrote to all:

Linux mx 5.15.63-gentoo-dist #1 SMP Thu Aug 25 12:40:44 -00 2022
x86_64 Intel(R) Xeon(R) CPU E5-2697 v4 @ 2.30GHz GenuineIntel
GNU/Linux Linux localhost 5.19.6-gentoo-dist #1 SMP PREEMPT_DYNAMIC
Wed Aug 31 18:48:13 -00 2022 x86_64 AMD EPYC 7642 48-Core Processor AuthenticAMD GNU/Linux

We've been switching over to Epyc boxes at work, and it's been a bit of a nightmare, although mostly that's been due to software limitations.

We started out with dual CPU 64-core Epyc CPUs, and ran into limitations with applications that couldn't deal with 256 processors. We had to manually pin each thread/appliaction to a core / set of cores.

We eventually switched over to purchasing single-CPU 64 core EPYC boxes, which resolved our issues with CPU pinning for the most part.


However, every single EPYC box we're running has to have IOMMU disabled in BIOS. Otherwise, after about 3 months of running the servers will start spewing "AMD-Vi: Completion wait loop timed out" errors. This will cause the pcie devices to rapidly disable/re-enable, which knocks out networking. We've yet to nail down the actual cause of the issue, and it doesn't seem to matter what kernel version we're running. The odd thing is that it will happen in short bursts, groups of servers (usually assigned to the same application) will start blowing up every hour or two, one after another. Not a fun thing when I'm on call, because I swear it starts happening overnight every time. :D




Mike


... Dancers do it with rhythm.
--- GoldED+/LNX 1.1.5-b20220504