Re: Is the kernel for sun4m SMP capable ?

Sure is - just not the one that ships with the default install. You=E2=80=99=
ll either need to drop in a pre-built GENERIC.MP kernel, or compile the =
kernel with the multiprocessor support enabled:
=E2=80=94> https://www.netbsd.org/ports/sparc/faq.html#smp-cpus

I will say - on the SS20 it makes quite a performance difference.

=E2=80=94
Samuel Furtaw

> On Jan 20, 2026, at 8:04=E2=80=AFPM, Dennis Clarke =
<[email protected]> wrote:
>=20
>=20
> On a dual CPU old Sun SPARCStation 20 it seems to be only using one =
CPU.
>=20
> If any one process is running at 100% CPU utilization then the entire
> machine reports 0% idle. However there are two CPUs in there.
>=20
>=20
> --=20
> --
> Dennis Clarke
> RISC-V/SPARC/PPC/ARM/CISC
> UNIX and Linux spoken
>=20