Two things:
- I never said Valve built DXVK or even WINE, just that they have a vested interest to ensure it works well on their AMD-based hardware
- I never mentioned anything about the scheduler or any Linux imtrinsics other than the AMD GPU kernel module
DirectX -> Vulkan isn’t a direct translation since the APIs aren’t 1:1, so there’s going to be some tuning in how APIs are mapped, and the tuning can differ depending on the GPU driver you’re using.
It’s the same with processors, you can optimize a compiler to work better on AMD vs Intel or vice versa (look at Intel C++ compiler benchmarks for an example of that), even if they use the exact same set of instructions because the microarchitectures are optimized differently. This is because the way the instruction set gets mapped to the microarchitecture can impact performance significantly (something like 10% is possible, depending on the benchmark).
GPU drivers are complicated, and there are a lot of areas where the interaction between the driver, software, and system services can be optimized. AMD’s drivers are open source, which helps with those optimization efforts. Then you throw in a big, well-funded, and motivated company like Valve funding development (both through salaries and donations) and you end up with AMD GPUs getting extra attention for things like DXVK.
So I would expect AMD on Linux to perform better vs NVIDIA on Linux when compared to AMD vs NVIDIA on Windows. As in, the performance difference on Linux vs Windows would be more favorable for AMD cards than NVIDIA ones because AMD on Linux gets more attention than NVIDIA on Linux. I don’t expect the same for compute, since NVIDIA invests heavily in that space on Linux, so it’s not an inherent advantage of the platform (e.g. the scheduler discussion), but a question of where optimization efforts are focused.
Alright look, I’m not going to argue about who said what because we both know what we said and it is unrelated to the topic at hand.
The reason the windows amd driver is bad is not due to performance, it is the very same reason why the proprietary driver is bad on Linux, it is horrible reliability.
There are circumstances where they trade blows and circumstances where they perform similarly. If you really want to compare the two based on OS alone, you need to compare the equivalent drivers which is the proprietary one.
We’re already not doing an apples to apples comparison here because we’re comparing WINE+DXVK vs DirectX. Comparing the OS itself isn’t that interesting, at least from an end-user perspective, what is interesting is comparing the typical user experience on both platforms. As in, no tinkering with stuff, just installing in the most obvious way.
Valve is optimizing for that typical user experience on their Steam Deck, and that translates to the desktop fairly well. They’re not really doing the same on Windows, so it’s interesting to compare devs+manufacturers optimizing stuff on Windows vs the community+Valve optimizing stuff on Linux.
Why would not comparing the OS itself be interesting? That is literally the foundation of everything you are seeing on the screen.
You also can’t just compare WINE+DXVK to DirectX, because you can actually use DXVK on windows. If the video title was “directx vs dxvk” then that would be totally fair, but it is not, it is called “windows vs linux”. I’m simply trying to say that the vast majority of games are not going to see a 17% increase in GPU performance, your biggest boost is going to lie with CPU bound games because it is the truth.
The only time you’ll see a game perform better on a GPU on Linux is when the game has a native version, and even then that only applies if they actively develop that version, many games are not actively developed and are even a few versions behind.
