https://bugs.freedesktop.org/show_bug.cgi?id=44568
Bug #: 44568 Summary: Half-Life 1 engine has poor fps is large areas Classification: Unclassified Product: Mesa Version: git Platform: Other OS/Version: Linux (All) Status: NEW Severity: normal Priority: medium Component: Drivers/Gallium/r600 AssignedTo: dri-devel@lists.freedesktop.org ReportedBy: toni.spets@iki.fi
Created attachment 55280 --> https://bugs.freedesktop.org/attachment.cgi?id=55280 Slow GLTrace
I've been following the fps of this engine for a few years, pre-gallium and lately gallium. There is a noticable fps drop in maps that contain water or a lot of models.
Normally, a fps drop from 100 to ~15 happens in action situations with smoke, other players, water etc.
Taken that the engine is over 10 years old, is using standard OpenGL and it runs very fine at 100fps on windows, my guesstimate is that it is using some unoptimized GL path.
Attached slow gltrace is from viewing an area where my fps in 800x600 resolution is around 56 with a lot of models on the screen and the fast trace is from a map that doesn't have that drop at all when nothing is happening.
The traces are around from the same period of time but the fast trace went at ~25 fps and the slow at ~5 fps when it was logged. Both traces start and end with the game menu but only briefly.
Would appreciate if someone could finally take a shot at fixing this.