I just found out that Steam OS supposedly defaults to using the schedutil CPU performance governor and that it's supposedly not really ideal for CPU-heavy workloads and is more ideal for power-saving and/or use-cases where you want more of your power budget going to the integrated graphics.
So here's an idea about the stutters - what if you set the CPU governor to something else? At least on my Linux Mint 20.3 installation on a Ryzen 4800U (which uses the very same L3-reduced Zen2 cores used in the Steam Deck), it defaults to the "Ondemand" governor instead with there also being an option for a "Performance" governor.
It may also be worth mentioning that it looks like Feral GameMode uses the "Performance" governor by default, though there's some mention of it using "powersave" when Intel integrated graphics are present (no idea about AMD, but it'd likely cause the same problems as "Schedutil").
So here's an idea about the stutters - what if you set the CPU governor to something else? At least on my Linux Mint 20.3 installation on a Ryzen 4800U (which uses the very same L3-reduced Zen2 cores used in the Steam Deck), it defaults to the "Ondemand" governor instead with there also being an option for a "Performance" governor.
It may also be worth mentioning that it looks like Feral GameMode uses the "Performance" governor by default, though there's some mention of it using "powersave" when Intel integrated graphics are present (no idea about AMD, but it'd likely cause the same problems as "Schedutil").
Dolphin 5.0 CPU benchmark
CPU: Pentium G3258 @ 4.5GHz 1.24v
GPU: Intel integrated
RAM: 4x4GB Corsair Vengence @ DDR3-1600
OS: Linux Mint of some variety + [VM] Win7 SP1 x64
CPU: Pentium G3258 @ 4.5GHz 1.24v
GPU: Intel integrated
RAM: 4x4GB Corsair Vengence @ DDR3-1600
OS: Linux Mint of some variety + [VM] Win7 SP1 x64