Incorrect VRAM quantity in the Status Bar ( GNU/Linux AMDGPU ) #81324

New Issue

Andrea Monzini · 2020-09-30T14:02:50+02:00

Andrea Monzini commented

2020-09-30 14:02:50 +02:00

Hello, first bug report :)
A minor bug about the VRAM displayed in the status bar in my GNU/Linux AMDGPU system.

System Information
Operating system: Linux-5.4.0-7642-generic-x86_64-with-debian-bullseye-sid 64 Bits
Graphics card: Radeon RX 580 Series (POLARIS10, DRM 3.35.0, 5.4.0-7642-generic, LLVM 10.0.0) X.Org 4.6 (Core Profile) Mesa 20.0.8

Blender Version
Broken: version: 2.90.1, branch: master, commit date: 2020-09-23 06:43, hash: 3e85bb34d0
Broken: 2.91.0 alpha
Worked: No

Short description of error
Displayed VRAM quantity in the status bar is wrong: 16 GB instead of 8 GB.

Exact steps for others to reproduce the error
In a similar system enable the Video Monitor option to show the GPU usage in the status bar.
Uploaded an image and system info file:

system-info.txt

Hello, first bug report :) A minor bug about the VRAM displayed in the status bar in my GNU/Linux AMDGPU system. **System Information** Operating system: Linux-5.4.0-7642-generic-x86_64-with-debian-bullseye-sid 64 Bits Graphics card: Radeon RX 580 Series (POLARIS10, DRM 3.35.0, 5.4.0-7642-generic, LLVM 10.0.0) X.Org 4.6 (Core Profile) Mesa 20.0.8 **Blender Version** Broken: version: 2.90.1, branch: master, commit date: 2020-09-23 06:43, hash: `3e85bb34d0` Broken: 2.91.0 alpha Worked: No **Short description of error** Displayed VRAM quantity in the status bar is wrong: 16 GB instead of 8 GB. **Exact steps for others to reproduce the error** In a similar system enable the Video Monitor option to show the GPU usage in the status bar. Uploaded an image and system info file: ![16GB.png](https://archive.blender.org/developer/F8940079/16GB.png) [system-info.txt](https://archive.blender.org/developer/F8940088/system-info.txt)

Andrea Monzini commented

2020-09-30 14:02:50 +02:00

Added subscriber: @AndreaMonzini

Harley Acheson commented

2020-09-30 19:34:58 +02:00

Added subscriber: @Harley

Harley Acheson commented

2020-09-30 19:34:58 +02:00

Thanks for this report. I might have to give this a think and do some further research as your result does not make a lot of sense.

First, it isn't just that the total is wrong, but both are wrong. Your capture shows a "used" amount of 8.8GiB when you are using a tenth of that. And I wouldn't even expect your hardware to report in that way at all...

Whether or not any card is going to have the option of showing VRAM amounts is based on whether it supports either of GL extensions 'GLEW_NVX_gpu_memory_info' or 'GLEW_ATI_meminfo'. I would expect your card to not support the former (with can report both total and free), but to support the later (which only reports free vram). In all cases the values returned are supposed to be a number of kilobytes. So I would expect your system to report something similar to this: VRAM 0.8 GiB Free not the version that shows both used and total.

Will look into it.

Thanks for this report. I might have to give this a think and do some further research as your result does not make a lot of sense. First, it isn't just that the total is wrong, but both are wrong. Your capture shows a "used" amount of 8.8GiB when you are using a tenth of that. And I wouldn't even expect your hardware to report in that way at all... Whether or not any card is going to have the option of showing VRAM amounts is based on whether it supports either of GL extensions 'GLEW_NVX_gpu_memory_info' or 'GLEW_ATI_meminfo'. I would expect your card to **not** support the former (with can report both total and free), but to support the later (which only reports free vram). In all cases the values returned are supposed to be a number of *kilobytes*. So I would expect your system to report something similar to this: `VRAM 0.8 GiB Free` not the version that shows both used and total. Will look into it.

Andrea Monzini commented

2020-09-30 20:43:48 +02:00

It seems that indeed there is 8 GiB more in both "used" VRAM and "Max" VRAM.

USED VRAM: 8.8 GiB while the correct value should be 0.8 GiB ( as i see in RadeonTop )
MAX VRAM: 16.0 GiB while the correct value should be 8.0 GiB

It seems that indeed there is 8 GiB more in both "used" VRAM and "Max" VRAM. USED VRAM: 8.8 GiB while the correct value should be 0.8 GiB ( as i see in RadeonTop ) MAX VRAM: 16.0 GiB while the correct value should be 8.0 GiB

Andrea Monzini commented

2020-09-30 21:14:37 +02:00

I did other research and i found that "GL_ATI_meminfo" seems correct while "GL_NVX_gpu_memory_info" seems not clear.
In this case Blender shows VRAM 9.0/16.0 GiB while it should be ~ 1.0/8.0 GiB ( like showed in RadeonTop )

So the "GL_NVX_gpu_memory_info" corrected valued should be "Dedicated video memory: 8192 MB" and not "Total available memory: 16384 MB"

Memory info (GL_ATI_meminfo):
    VBO free memory - total: 7119 MB, largest block: 7119 MB
    VBO free aux. memory - total: 8104 MB, largest block: 8104 MB

Memory info (GL_NVX_gpu_memory_info):
    Dedicated video memory: 8192 MB
    Total available memory: 16384 MB
    Currently available dedicated video memory: 7119 MB

Screenshot with Blender, RadeonTop and glxinfo:

More detailed info:

linux@pop-os:~$ glxinfo | egrep -i 'device|memory'
    Device: Radeon RX 580 Series (POLARIS10, DRM 3.35.0, 5.4.0-7642-generic, LLVM 10.0.0) (0x67df)
    Video memory: 8192MB
    Unified memory: no
Memory info (GL_ATI_meminfo):
    VBO free memory - total: 7119 MB, largest block: 7119 MB
    VBO free aux. memory - total: 8104 MB, largest block: 8104 MB
    Texture free memory - total: 7119 MB, largest block: 7119 MB
    Texture free aux. memory - total: 8104 MB, largest block: 8104 MB
    Renderbuffer free memory - total: 7119 MB, largest block: 7119 MB
    Renderbuffer free aux. memory - total: 8104 MB, largest block: 8104 MB
Memory info (GL_NVX_gpu_memory_info):
    Dedicated video memory: 8192 MB
    Total available memory: 16384 MB
    Currently available dedicated video memory: 7119 MB
    GL_AMD_performance_monitor, GL_AMD_pinned_memory, 
    GL_EXT_framebuffer_object, GL_EXT_framebuffer_sRGB, GL_EXT_memory_object, 
    GL_EXT_memory_object_fd, GL_EXT_packed_depth_stencil, GL_EXT_packed_float, 
    GL_MESA_texture_signed_rgba, GL_NVX_gpu_memory_info, 
    GL_AMD_pinned_memory, GL_AMD_query_buffer_object, 
    GL_EXT_gpu_shader4, GL_EXT_memory_object, GL_EXT_memory_object_fd, 
    GL_MESA_texture_signed_rgba, GL_MESA_window_pos, GL_NVX_gpu_memory_info, 
    GL_EXT_memory_object, GL_EXT_memory_object_fd, GL_EXT_multi_draw_arrays,

I did other research and i found that "GL_ATI_meminfo" seems correct while "GL_NVX_gpu_memory_info" seems not clear. In this case Blender shows VRAM 9.0/16.0 GiB while it should be ~ 1.0/8.0 GiB ( like showed in RadeonTop ) So the "GL_NVX_gpu_memory_info" corrected valued should be "Dedicated video memory: 8192 MB" and not "Total available memory: 16384 MB" ``` Memory info (GL_ATI_meminfo): VBO free memory - total: 7119 MB, largest block: 7119 MB VBO free aux. memory - total: 8104 MB, largest block: 8104 MB ``` ``` Memory info (GL_NVX_gpu_memory_info): Dedicated video memory: 8192 MB Total available memory: 16384 MB Currently available dedicated video memory: 7119 MB ``` Screenshot with Blender, RadeonTop and glxinfo: ![Screenshot from 2020-09-30 21-07-40.png](https://archive.blender.org/developer/F8941299/Screenshot_from_2020-09-30_21-07-40.png) More detailed info: ``` linux@pop-os:~$ glxinfo | egrep -i 'device|memory' Device: Radeon RX 580 Series (POLARIS10, DRM 3.35.0, 5.4.0-7642-generic, LLVM 10.0.0) (0x67df) Video memory: 8192MB Unified memory: no Memory info (GL_ATI_meminfo): VBO free memory - total: 7119 MB, largest block: 7119 MB VBO free aux. memory - total: 8104 MB, largest block: 8104 MB Texture free memory - total: 7119 MB, largest block: 7119 MB Texture free aux. memory - total: 8104 MB, largest block: 8104 MB Renderbuffer free memory - total: 7119 MB, largest block: 7119 MB Renderbuffer free aux. memory - total: 8104 MB, largest block: 8104 MB Memory info (GL_NVX_gpu_memory_info): Dedicated video memory: 8192 MB Total available memory: 16384 MB Currently available dedicated video memory: 7119 MB GL_AMD_performance_monitor, GL_AMD_pinned_memory, GL_EXT_framebuffer_object, GL_EXT_framebuffer_sRGB, GL_EXT_memory_object, GL_EXT_memory_object_fd, GL_EXT_packed_depth_stencil, GL_EXT_packed_float, GL_MESA_texture_signed_rgba, GL_NVX_gpu_memory_info, GL_AMD_pinned_memory, GL_AMD_query_buffer_object, GL_EXT_gpu_shader4, GL_EXT_memory_object, GL_EXT_memory_object_fd, GL_MESA_texture_signed_rgba, GL_MESA_window_pos, GL_NVX_gpu_memory_info, GL_EXT_memory_object, GL_EXT_memory_object_fd, GL_EXT_multi_draw_arrays, ```

Richard Antalik commented

2020-10-07 15:46:39 +02:00

Added subscriber: @iss

Richard Antalik commented

2020-10-07 15:46:39 +02:00

I guess a stupid question, but I don't see VRAM stats on my machine. Is this HW or OS specific?

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: Radeon RX550/550 Series ATI Technologies Inc. 4.5.14736 Core Profile Context 20.8.3 27.20.12027.1001

I guess a stupid question, but I don't see VRAM stats on my machine. Is this HW or OS specific? System Information Operating system: Windows-10-10.0.18362-SP0 64 Bits Graphics card: Radeon RX550/550 Series ATI Technologies Inc. 4.5.14736 Core Profile Context 20.8.3 27.20.12027.1001

Andrea Monzini commented

2020-12-23 15:59:27 +01:00

Hello, just a quick update: same problem with 2.91.0 and 2.192 Alpha ( system updated to Pop!_OS 20.10 )

@iss i have not tested other OS but in GNU/Linux you have to right click on Blender Version and check "Video Memory "

Hello, just a quick update: same problem with 2.91.0 and 2.192 Alpha ( system updated to Pop!_OS 20.10 ) @iss i have not tested other OS but in GNU/Linux you have to right click on Blender Version and check "Video Memory " ![screen.png](https://archive.blender.org/developer/F9526881/screen.png)

Ankit Meel commented

2021-04-18 15:47:06 +02:00

Added subscriber: @ankitm

Ankit Meel commented

2021-04-18 15:47:06 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Ankit Meel commented

2021-04-18 15:47:06 +02:00

Confirming as per @Harley 's comment.

Philipp Oeser removed the

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Incorrect VRAM quantity in the Status Bar ( GNU/Linux AMDGPU ) #81324