Re: NetBSD on Intel N100

On Tue, 11 Aug 2026, Jukka Marin wrote:

> There's the Speed Shift option and it's enabled (by default).  I think
> the CPU clock is shown as 800 MHz in BIOS, so that's probably why it's
> also 800 MHz under NetBSD,
>

That's your CPU's base frequency. In Turbo mode it should go up (depending on
other factors like core temp, power draw and work load on the cores) to 3.4 GHz:

https://www.intel.com/content/www/us/en/products/sku/231803/intel-processor-n100-6m-cache-up-to-3-40-ghz/specifications.html

My CPU (an Ice Lake) has a Base frequency of 1.2 GHz, but, I can see it going
up to 3.4 GHz under load on OpenBSD, FreeBSD and Linux. To get the actual
running frequency one has to read the MPERF and APERF MSRs and do a small
calculation like:

https://lwn.net/Articles/816388/

(see also the FreeBSD kernel code I linked to earlier.)

-RVP