I have a 6 core 12 thread xeon processor, when opening up the editor or doing a launch on something where a lot (1000+) shaders need to be built, for some reason only 2 shader compiler worker threads get launched and it takes a long time with CPU at 15-20% to get the shaders all built.
I’m pretty sure a year or so ago I was routinely seeing a lot of shader compiler threads getting spawned and the machine running near 100%.
Has something changed?
I looked all over for a solution to this and mostly found threads a year or more old.
Tried changing BuildConfiguration.xml MaxProcessorCount to several values, no visible change.
Tried editing BaseEngine.ini and changing NumUnusedShaderCompilingThreads to 1 and to 6, still no change.
So I figure either something has changed or I’m editing the wrong file.
It seems like BaseEngine.ini exists in a number of places, so maybe I’m editing the wrong file? I have tried editing
C:\Program Files\Epic Games\UE_4.19\Engine\Config
Neither seem to have any effect on the number of threads spawned.
How can get more shader compiling threads launching to use all my cores?