On 13 Jun 2019, at 22:46, Stuart Henderson wrote:
On 2019/06/13 20:08, mabi wrote:
‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Wednesday, June 12, 2019 10:26 PM, Stuart Henderson
<s...@spacehopper.org> wrote:
If you're on an old BIOS revision for the APU (more than a couple of
months old), try updating, they have enabled "core performance
boost"
which increases speed of a single core if the others are not under
heavy load.
I haven't done network benchmarks but there is a noticable
improvement
in some other things (md5 -tt goes from 12 -> 9 seconds).
To update BIOS from OpenBSD, pkg_add flashrom and download the BIOS
version for your board (https://pcengines.github.io/). Go to serial
console and reboot in single-user mode (boot -s), mount -a, and run
"flashrom --programmer internal -w apuX_vXXX.rom". Then reboot back
as normal.
If you'd like to compare benchmarks, the feature can be toggled
from the setup menu in BIOS.
https://blog.3mdeb.com/2019/2019-02-14-enabling-cpb-on-pcengines-apu2/
Thanks Stuart for the hint, that sounds fantastic. I bought my APU4
recently so it has a few months old BIOS (v4.0.24 to be precise) and
based on the change log it also seems to include that "core
performance boost". I need to reboot and check the BIOS settings
first see if this new setting is enabled or not by default. I have
the feeling it is not enabled. Anyway I think I will upgrade the BIOS
to the latest v4.9.0.6.
Will keep you posted as soon as I check this but right no I can't
reboot the box.
4.9.0.6 does have it enabled by default. I'm not sure about the 4.0.x
releases
and don't want to reboot mine to check now either :)
Beginning with BIOS 4.0.24 CPB is activated for the legacy 4.0.x BIOS
(according to pcengines.github.io). My APU2s and APU3s are running
smooth with 4.9.0.6 with 6.5-syspatched.
