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I am catching up on comments The reason I wrote this is I run this laptop in hybrid (AMD display + NVIDIA as swap). So all at VRAM was going to waste. On your
by c0dejedi 4mo ago
I am catching up on comments
The reason I wrote this is I run this laptop in hybrid (AMD display + NVIDIA as swap). So all at VRAM was going to waste.
On your question re: switchable swap. It's on my to-do list ;)
- kllrnohj 4mo agoWouldn't this prevent the nvidia GPU from being power gated since it's never "idle"? So like your battery life regresses?
- qingcharles 4mo agoGood point, you might wanna disable it on battery, but I'm guessing a lot of people have their laptop plugged in practically 24x7.
- nyrikki 4mo agoWhile it may prevent sleep, one of the frustrations I have on an old skylake desktop with a bunch of 1080ti GPUs is that when set to power saving modes, the GPUs sit at 1x2.0 pcie lanes and low wattage. That slows down loading quite a bit. So it will use more power, but nothing close to when the GPU is being used.
- tremon 4mo agoIs VRAM not directly accessible by the system then? Since it's mapped directly into the CPU's address space, I had assumed that there's a simple DMA controller managing said access and I would then also naively assume that said controller is separate (or at least on a separate power plane) from the actual GPU.
- kllrnohj 4mo agothey are talking about the scenario of having a discreet GPU in addition to the GPU on the CPU. So there's 2 GPUs, and the nvidia one has its own VRAM (typically of the GDDR variety even) that isn't shared with system RAM (hence the purpose of this project). So that also means 2 memory controllers.