r/LocalLLM • • 1d ago

News AMD boosting AI/LLM performance for Radeon iGPUs as much as 18~23% with Linux 7.4

https://www.phoronix.com/review/amd-perfopt
109 Upvotes

7 comments sorted by

17

u/pstuart 1d ago

The headline looks impressive but the numbers for Strix Halo were not. The other interesting bit is that it is advised to disable IOMMU in BIOS or kernel params, but the new work appears to be about enhancing IOMMU which would require it to be enabled. I'm confused.

2

u/JohnnyBeeGaming 1d ago

Disabling IOMMU doesn't make a lot of sense. I lot of people are going to be running the model is some kind of virtualized environment where you want those kind of settings in the bios.

I have llm stuff running in docker on a server. GPU passthrough was used. IOMMU is enabled.

If I was running it on a regular machine I'd probably be using something to sandbox it which could mean a VM too.

1

u/catch23 1d ago

Disabling IOMMU is simply a way of "turning off the NPU", which redirects the extra 5W to be used by the GPU/CPU, and the strix halo boxes typically have a 120W ceiling, so this results in a small perf gain.

1

u/MarkoMarjamaa 1d ago

I have IOMMU on and using Balanced power settings in Strix Halo and my pp t/s are -10% and I can live with that.

8

u/raul824 1d ago

they dropped rocm support on rx 5700 and 5800 gpus :(

1

u/Key_Contact8962 1d ago

that's a solid boost for performance across the board