Brunnis

Yes, I've run both the Geekbench 5 and stress-ng tests with kernel8.img and get the very same low results @ 2.8 GHz on the 8GB board, unfortunately. I should perhaps...

One pretty interesting comparison is the 4GB @ 2.4 GHz vs 8GB @ 2.8 GHz in Geekbench 5. See the full comparison here: https://browser.geekbench.com/v5/cpu/compare/22028225?baseline=22028307 It is interesting to note that...

Yes, no throttling detected on either board (checked via vcgencmd). The 8GB board uses the active cooler and the 4GB board is in the official fan case. I've used force_turbo=1...

Thanks for the detailed response. I agree that part of the issue may be different internal RAM arrangement causing certain performance differences. As you say, though, the adverse effect of...

Interesting. So what are the results of the 4GB board in this test?

@popcornmix Did you run your test program yet on the 4GB board to see how it compares? Is anyone going to look further into this from the Raspberry Pi side?...

@Darkflib I actually did test that a while ago, but it did not change the results. Well, at least not in terms of the major performance regression at higher frequencies....

Thank you for the elaborate response. I did a quick test of the two suggested timing settings on my 8GB board, using Geekbench 5. These tests were run on a...

I am the one that initially reported the issue on Ubuntu 23.10 in the forum thread. Since there's no easy way of applying the fix in Ubuntu (right?), I have...

> `swiotlb buffer is full` is a little worrying as I wouldn't expect there to need to be swiotlb usage under most situations. I've been seeing that a lot on...