| 31 Dec 2024 |
 K900 | I didn't expect it to be this bad | 16:45:47 |
 Niklas Korz | Should check if I still have a it enabled | 16:45:52 |
| K900 | But I guess it's an open world game so it's hammering the bus hard? | 16:46:00 |
 tuxiqae | * | 16:46:00 |
| Niklas Korz | * Should check if I still have it enabled | 16:46:04 |
| K900 | And they probably haven't optimized for it because console port and consoles are UMA | 16:46:20 |
| tuxiqae | Yeah, crazy | 16:46:22 |
| K900 | In reply to @niklaskorz:korz.dev
Should check if I still have it enabled Yes | 16:46:23 |
| K900 | It's free perf | 16:46:31 |
 Emma [it/its] | TIL that makes a difference, it's litterally called Cryptocurrency Mining mode in my bios 😠| 16:47:57 |
| Niklas Korz | wtf | 16:48:17 |
| tuxiqae | The difference is that Region 0 had 256M and now has 32G and Region 2 having 2M size, while now it has 256M size
Is that how you noticed it? | 16:48:45 |
| Emma [it/its] | not even making this up, it's just called "Above 4G decoding/Crypto mining" | 16:49:02 |
| Emma [it/its] | one sec imma reboot lol | 16:49:07 |
| K900 | 256M is the default BAR size | 16:49:10 |
| K900 | So I just looked for mappings bigger than 256M | 16:49:25 |
| K900 | And there were none | 16:49:29 |
| K900 | In reply to @emma:rory.gay
not even making this up, it's just called "Above 4G decoding/Crypto mining" That's technically a separate option | 16:49:50 |
| Niklas Korz | Do Nvidia drivers still need the explicit kernel param for enabling rebar or is that enabled by default nowadays? | 16:50:18 |
| K900 | In reply to @niklaskorz:korz.dev
Do Nvidia drivers still need the explicit kernel param for enabling rebar or is that enabled by default nowadays? Not sure | 16:50:28 |
| K900 | But yeah "above 4G decoding" basically just allows DMA on full width addresses | 16:51:12 |
| K900 | Instead of just 32-bit | 16:51:16 |
| Emma [it/its] | 
Download 1000009034.jpg | 16:51:31 |
| Emma [it/its] | Cant change rebar size though | 16:51:49 |
| K900 | And the reason it's called "crypto mining" especially on older boards because if you connect a lot of GPUs to one machine, you'll run out of the 4G of 32-bit address space even with default BAR size | 16:52:10 |
| K900 | Because 4G/256M = 8 GPUs and some of that memory will be reserved by other things too | 16:52:47 |
| Niklas Korz | In reply to @emma:rory.gay
Cant change rebar size though I think the gpu drivers will do that for you | 16:52:50 |
| Emma [it/its] | Ah | 16:53:09 |
| K900 | So realistically you won't be able to find 8 contiguous 256M regions | 16:53:14 |
| K900 | And resizable BAR is another thing that allows you to actually change how much address space is allocated to each device | 16:53:53 |
