@antoinerichermoz On Linux, it appears that the bulk of this performance regression was introduced with driver 555.42.02, and it continued into all newer driver series. So all versions of 555, 560, 565, 570, and 575 have the performance regression. The entire 550 driver series does not appear to have the issue. 550.163.01 is currently the newest driver in that series. The 550 driver series unfortunately does not support 5000 series cards (i.e. Blackwell), so those needing decent sparse texture performance on Blackwell are out of options at this point.
The code used to collect that data is here:
This is an OpenGL repro, but I suspect both OGL and Vulkan are impacted by the same underlying driver issue.
@mclachyd did report an issue with 550.163.01, but assuming it’s reproducible, it is probably different than the issues being tracked by the repositories above. It would be very good to have some repro code for it so we know where it fits into things.