0005238: Reduce CPU draw call overhead in the backend

ID	Project	Category	View Status	Date Submitted	Last Update

0005238	The Dark Mod	Graphics	public	03.05.2020 11:08	30.12.2020 17:46

Reporter	cabalistic	Assigned To	cabalistic
Priority	normal	Severity	normal	Reproducibility	have not tried
Status	resolved	Resolution	fixed
Product Version	TDM 2.08
Target Version	TDM 2.09	Fixed in Version	TDM 2.09

Summary	0005238: Reduce CPU draw call overhead in the backend
Description	Due to the number of frequent small draw calls issued by the engine - especially during interaction rendering - with regular state changes in-between (textures, uniforms, ...), the CPU overhead per draw calls is high and can easily starve the GPU, leading to wasted time. Experiments with more modern draw call setups have shown that we can significantly reduce this overhead and thereby also improve the GPU frame times. Although this will currently not immediately result in improved framerates (as long as com_smp is enabled, because in that case any savings are hidden behind the CPU time of the frontend), it is still a necessary step to realize higher framerates when we also further optimize the frontend.
Tags	No tags attached.

Date Modified	Username	Field	Change
03.05.2020 11:08	cabalistic	New Issue
03.05.2020 11:08	cabalistic	Status	new => assigned
03.05.2020 11:08	cabalistic	Assigned To	=> cabalistic
02.07.2020 20:03	cabalistic	Status	assigned => resolved
02.07.2020 20:03	cabalistic	Resolution	open => fixed
02.07.2020 20:03	cabalistic	Fixed in Version	=> TDM 2.09
30.12.2020 02:17	nbohr1more	Relationship added	child of 0003684
30.12.2020 17:46	nbohr1more	Relationship added	parent of 0005476

parent of	0005476	closed	cabalistic	Bindless Textures causes freezes and stutter when changing Anisotropic Filtering in a loaded Mission
child of	0003684	new		Investigate GPL Renderer Improvements