RadeonSI Enables NGG Shader Culling For Navi 1x Consumer GPUs

[phoronix]

Phoronix: RadeonSI Enables NGG Shader Culling For Navi 1x Consumer GPUs

As another possible performance win for RadeonSI Gallium3D as AMD's open-source Radeon OpenGL driver on Linux systems is enabling of NGG culling for Navi 1x consumer graphics processors rather than limiting it only to newer Navi 2x (RDNA2) GPUs...

https://www.phoronix.com/scan.php?page=news_item&px=RadeonSI-NGG-Culling-Navi-1x

[tildearrow]

Nice. Is there any reason why is NGG culling not too beneficial for Vulkan?

[8r34k0u7_57y13]

Nice. Is there any reason why is NGG culling not too beneficial for Vulkan?

It is.

It's not beneficial right now now for RDNA1 as

Meanwhile on the Vulkan driver side, Mesa 21.3's RADV enables NGG culling but only for the latest Navi 2x GPUs.

[CochainComplex]

I remember that I have tested NGG culling a few month ago when the mr was just submitted by timur on my 5700XT. At that time I had slightly worse performance in games e.g. CB2077. Not tested it since then.

edit ...I was writing nonsense in the last paragraph...

[skeevy420]

Quick question.

Is $600+tax really stupid for an Asus Zaku motherboard and a 6600 XT?

Whoops....$699+tax.

[CochainComplex]

Quick question.

Is $600+tax really stupid for an Asus Zaku motherboard and a 6600 XT?

edit:
that one is solved: thx @billyswong...
any reason why it is blank ? ...cant embbed any pic. reuploading to an imgur server does also not work.

[CochainComplex]

Mesa should be determining on the fly whether to disable or enable NGG, using a runtime performance feedback mechanism.

I really like the idea but is it even feasible without degrading the runtime performance?
constant monitoring the the procedure sounds to me like a quite performance hungry endeavour.
But could work very good once we hit theamdahl's bottleneck and having the one or other core unoccupied with work.

[billyswong]

https://imgflip.com/i/5qzozb

any reason why it is blank ? ...cant embbed any pic. reuploading to an imgur server does also not work.

You used the html link, not the actual image url.

[CochainComplex]

...damn ...now I feel a bit embarrassed thx for helping

[Venemo]

I remember that I have tested NGG culling a few month ago when the mr was just submitted by timur on my 5700XT. At that time I had slightly worse performance in games e.g. CB2077. Not tested it since then.

It doesn't affect every game in the same way, because they have different bottlenecks. CP2077 is very heavily compute shader bound, so it won't improve by changing the vertex processing pipeline.