realesrgan-ncnn-vulkan (v0.2.0) stucks/hangs on Google Colab (Ubuntu 22.04 LTS / Tesla T4 GPU /Vulkan 1.3.231)

[scopeallen]

Command:

! ~/realesrgan-ncnn-vulkan -i ~/test.png -o /root/output.png -s 4 -m ~/models -n xinntao-realesrgan-x4plus -f png

Output:

[0 llvmpipe (LLVM 15.0.7, 256 bits)] queueC=0[1] queueG=0[1] queueT=0[1]
[0 llvmpipe (LLVM 15.0.7, 256 bits)] bugsbn1=0 bugbilz=0 bugcopc=0 bugihfa=0
[0 llvmpipe (LLVM 15.0.7, 256 bits)] fp16-p/s/a=1/1/1 int8-p/s/a=1/1/1
[0 llvmpipe (LLVM 15.0.7, 256 bits)] subgroup=8 basic=1 vote=1 ballot=1 shuffle=1

and stucks/hangs here forever.

[NeedsMoar]

Well, you're running it on the llvmpipe software renderer which is likely the only thing that provides a high enough vulkan version if the upscaler chose that (and it's not stuck forever, it'll eventually output something someday, I seem to recall those colab instances having pretty terrible CPU allocation since the GPU was the main purpose), or possibly you just need to run vulkaninfo and specify -g # to specify the device number corresponding to the T4 if its drivers have a compatible vulkan.