Michał Żygowski has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/31229 )
Change subject: src/mainboard/pcengines/apu2/OemCustomize.c: Enable CPB feature ......................................................................
Patch Set 1:
(2 comments)
https://review.coreboot.org/#/c/31229/1//COMMIT_MSG Commit Message:
https://review.coreboot.org/#/c/31229/1//COMMIT_MSG@9 PS1, Line 9: Enable Core Performance Boost feature in automatic mode.
Could you please elaborate on what CPB actually does, and what effect the user will notice?
CPB allows to raise single core frequency from 1000MHz to 1200MHz during huge load. Processor has additional boosted P states when CPB is enabled, but these are hidden from OS.
I can add more information to commit message if You like.
https://review.coreboot.org/#/c/31229/1//COMMIT_MSG@12 PS1, Line 12:
Tested how?
I have performed some tests using https://github.com/kdlucas/byte-unixbench The suite showed c.a. 20% raise in overall index score for single core tests compared to the firmware without this patch.