100% CPU used on some linux setups

[pfgithub]

Any wgpu sample uses 100% of one cpu core on linux, even though the time to render and display the frame is less than that

zig build triangle_wgpu-run # uses 100% cpu
zig build minimal_glfw_gl-run # barely uses any cpu

In tracy sampling, it seems like it might be spending all its time on gctx.device.tick inside zgpu.GraphicsContext.uniformsNextStagingBuffer.

This could possibly be an issue specific to the i3 window manager, I haven't tested in any other wm.

[hazeycode]

No repro running popOS with X11 and radv Mesa 24.0.3-1 driver.

[citruslee]

can concur, 5% CPU across all the cores on PopOS X11 with NVIDIA: 560.35.03 560.35.3.0 driver. It does have a 100% CPU spike for a split second, but it is at the very beginning. This is a 13th gen i7-13700HX laptop CPU, 16GB RAM with 4060 8gb VRAM laptop GPU. (Lenovo Legion, somethingsomething, forgot the exact model name)

[y2kbugger]

I get 100% cpu also. And also using i3. Could wm really affect it though?

$ zigup run 0.14.0-dev.2577+271452d22 build run
Warning: vkCreateInstance: Found no drivers!
Warning: vkCreateInstance failed with VK_ERROR_INCOMPATIBLE_DRIVER
at CheckVkSuccessImpl (/home/runner/work/mach-gpu-dawn/mach-gpu-dawn/libs/dawn/src/dawn/native/vulkan/VulkanError.cpp:88)
at CreateVkInstance (/home/runner/work/mach-gpu-dawn/mach-gpu-dawn/libs/dawn/src/dawn/native/vulkan/BackendVk.cpp:416)
at Initialize (/home/runner/work/mach-gpu-dawn/mach-gpu-dawn/libs/dawn/src/dawn/native/vulkan/BackendVk.cpp:302)
at Create (/home/runner/work/mach-gpu-dawn/mach-gpu-dawn/libs/dawn/src/dawn/native/vulkan/BackendVk.cpp:232)
at operator() (/home/runner/work/mach-gpu-dawn/mach-gpu-dawn/libs/dawn/src/dawn/native/vulkan/BackendVk.cpp:479)

info: [zgpu] High-performance device has been selected:
info: [zgpu] Name: Null backend
info: [zgpu] Driver:
info: [zgpu] Adapter type: cpu
info: [zgpu] Backend type: nul
info: [zgpu] Window has been resized to: 1920x1061.

for me time is split between the binary and xorg:

edit: leaving this for anyone who is just getting started, but installing vulkan fixed this...