CTS Hangs on Vulkan/Linux/Haswell and lavapipe

[cwfitzgerald]

Description

Run any real test under lavapipe and the runner will just hang. This happens with both lavapipe and the Haswell drivers, but sometimes under haswell the heap gets corrupted as well.

The tests do work on Vulkan/Windows/Nvidia, though that's not saying much.

Platform

Mesa drivers 21.3.* from https://launchpad.net/~oibaf/+archive/ubuntu/graphics-drivers.

[kvark]

Sounds like we should submit a bugreport to Mesa.

[cwfitzgerald]

Yeah it seems like it. Trying to narrow down the hardware effected. I've gotten stalls on:

lavapipe
Haswell
Comet Lake

All under mesa 21.*

I did not get stalls under AMDGPU, but I'm not 100% sure that it wasn't running nvidia on that machine.

Next step is to implement DENO_WEBGPU_ADAPTER_NAME so that we can choose an adapter with certainty.

[VarLad]

@cwfitzgerald Is there a mesa issue I can follow?

[cwfitzgerald]

I don't know of one.

[kvark]

The haswell driver issue may be #1672 and #2070, which got fixed upstream.

[cwfitzgerald]

We no longer use lavapipe in CI, so this isn't important enough to pin.

[jimblandy]

cargo nextest run passes just fine for me with a local build of "llvmpipe (LLVM 16.0.5, 256 bits)".

$ WGPU_BACKEND=vulkan VK_ICD_FILENAMES=$HOME/mesa/build/src/gallium/targets/lavapipe/lvp_devenv_icd.x86_64.json exec cargo run -p wgpu-info |& head -20
    Finished dev [unoptimized + debuginfo] target(s) in 0.09s
     Running `target/debug/wgpu-info`
Adapter 0:
	   Backend: Vulkan
	      Name: "llvmpipe (LLVM 16.0.5, 256 bits)"
	  VendorID: 65541
	  DeviceID: 0
	      Type: Cpu
	    Driver: "llvmpipe"
	DriverInfo: "Mesa 23.2.0-devel (git-92a7cba4f2) (LLVM 16.0.5)"
	 Compliant: true
	Features:
		                                           DEPTH_CLIP_CONTROL: true
		                                              TIMESTAMP_QUERY: true
		                                      INDIRECT_FIRST_INSTANCE: true
		                                                   SHADER_F16: true
		                                     RG11B10UFLOAT_RENDERABLE: true
		                                        DEPTH32FLOAT_STENCIL8: true
		                                       TEXTURE_COMPRESSION_BC: true
		                                     TEXTURE_COMPRESSION_ETC2: false
$ 

[cwfitzgerald]

Closing as out of date - this is paritcularly for running the CTS with deno. It's old enough that we it's not worth having open though.