[d3d9] TrackMania Nations Forever - low performance

dxvkclosed performanced3d9

doitsujin/dxvk#1910 · opened 2021-01-29 by lukashoracek · updated 2021-04-30 · 1 comments · github

Llukashoracek 2021-01-29 github

~22 FPS with DXVK
~85 FPS with wined3d
~135 FPS with DXVK and this DXVK config (suggested by CME on Discord):

d3d9.swvpFloatCount = 128
d3d9.swvpIntCount = 16
d3d9.swvpBoolCount = 16

Software information

TrackMania Nations Forever
32-bit
TmForever.exe
Very high preset with AA off & 16x Anisotropic filtering

System information

GPU: NVIDIA GeForce GTX 1660 SUPER
Driver: 455.50.04
Wine version: 5.13 (Proton)
DXVK version: 1.7.3

Apitrace file(s)

Apitrace with Proton & DXVK

Log files

TmForever_d3d9.log

IIglu47 2021-03-09 github

It looks like d3d9.swvpFloatCount = 128 is causing some problem. Trackmania player ghost is dark/black now.
tmf
left - build from site. right - local build with revert https://github.com/doitsujin/dxvk/commit/ff9d451a4e823904540b3618461b429575f398dc

I found that similar is used for another 32 bit game, but it doesn't use such a small value: https://github.com/doitsujin/dxvk/blob/787297ee4e46ccf8e4f6da39d37c8d2742b0359f/src/util/config/config.cpp#L271
@CME42 advised me to increase the value to 256 and with him there is no such problem anymore.

I did some tests and found that the value 256 also causes a slight drop in performance.
gtx 1080ti on 455.50.10 driver version
d3d9.swvpFloatCount = 128: 279 279 279 280 279 278 280 (~279,14±0,81 fps)
d3d9.swvpFloatCount = 256: 276 277 276 276 278 278 278 (~277,00±1,02 fps)
~-0,7677% (**but there must still be an Observational error)
Also I did additional tests with d3d9.swvpFloatCount = 256 d3d9.swvpIntCount = 32 d3d9.swvpBoolCount = 32:
275 278 277 278 276 277 276 (~276,71±1,10 fps)
this gives a slightly more performance loss (but it is so small also that it may be an Observational error), so it looks likes only increase d3d9.swvpFloatCount be preferable.

d3d9.swvpFloatCount = 192 still causes the described problem as with 128

Nothing extracted yet.