(12-14-2018, 05:38 AM)p12 Wrote: Sorry, that's incorrect as a general statement. Only the very first big.LITTLE implementations couldn't run all big and little cores at the same time, that was Exynos 5410 and Tegra 3 with its low-power companion core, some chips from Apple and maybe something else. Nowadays the kernel decides what cores to power at what frequency and it may be even all big and all cores if the need arises.This is a very good news. Thanks for the update.
RK3399 should very well be able to run all 6 cores at the same time.
I suspect that the original poster did not have any heatsink attached which caused throttling and shutdown of some cores.
The ROCKPRO64 I used is mounted with a fan on top of the heatsink (the ones from PINE64 shop). I tried to run the app "CPU Throttling Test" and the board ran very well without throttling.