Is Ubuntu 19.04 able to support Intel Core i9-9980XE Extreme Edition or AMD Ryzen 9 3950X?

[Ralf Mardorf]

Hi,

since it's Friday [1], did you notice the power consumption of those
CPUs?

On Thu, 2019-07-18 at 16:39 +0000, Turritopsis Dohrnii Teo En Ming wrote:
> Intel Core i9-9980XE

TDP 165 W

> AMD Ryzen 9 3950X

TDP 105 W

OTOH depending on the tasks you are doing a CPU with less power
consumption, that takes way longer to do the same, could have a less
good energy efficiency. Even if such a CPU would make sense for
something I might need to do, I couldn't pay my German power bill
anymore. Fortunately it wouldn't make sense for what I'm doing with my
computers.

This is the output of an Ubuntu 16.04 x86_64 kernel:

$ grep NR_CPUS config-4.4.0-154-lowlatency 
CONFIG_NR_CPUS=512

IOW by default x86_64 Ubuntu kernels are obviously limited to 512 cores.

Depending on what you try to achieve, you might need to assign processes
to cores by command line, the automated assignment not necessarily knows
what you try to achieve.

If I would guess, that I could benefit from such an amount of CPUs, I
would ask the subscribers of this or a more specialized list regarding
experiences with those and/or similar machines for a specific purpose.

Using such CPUs doesn't make sense for a lot of tasks. Those CPUs are
most likely very useful for some tasks, but after you installed Ubuntu
to a machine with such a CPU, you most likely have to do a lot of work
yourself. I seriously doubt that the automated assignment of CPUs to
processes does the right thing for a specific purpose.

Btw. you need to ensure that the firmware of the motherboards that could
use all cores of such new CPUs, does work flawlessly with Linux.

Regards,
Ralf

[1] https://www.fridaysforfuture.org/