Bug 111576

Summary:	[bisected] Performance regression in X4:Foundations in 19.2
Product:	Mesa	Reporter:	Malte zu Klampen <malte>
Component:	Drivers/Vulkan/radeon	Assignee:	mesa-dev
Status:	RESOLVED FIXED	QA Contact:	mesa-dev
Severity:	not set
Priority:	not set	CC:	bas, cwabbott0
Version:	19.2
Hardware:	x86-64 (AMD64)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Malte zu Klampen 2019-09-06 13:59:43 UTC

Somewhere between mesa-19.1.6 and mesa-19.2.0-rc2 a severe performance regression in X4:Foundations snuck in.

The main menu (and gameplay) renders at <1 fps after 74470baebbdacc8fd31c9912eb8c00c0cd102903, ac/nir: Lower large indirect variables to scratch

I tried adjusting graphics settings to perhaps isolate one specific option, but it didn't seem to matter.

I then checked out mesa-19.2-rc2 and reverted the commit, after which the game rendered normally at 60fps.

GPU:    AMD RX480
LLVM:   8.0.1
Kernel: 5.2.7

I'll be happy to help diagnose further but I'm at my wits' end.

Comment 1 Bas Nieuwenhuizen 2019-09-08 19:29:23 UTC

Should be fixed by

https://gitlab.freedesktop.org/mesa/mesa/merge_requests/1892

Is already fixed differently in master.

Comment 2 Malte zu Klampen 2019-09-09 18:16:37 UTC

I see that merge request was just merged, so I did a quick look into staging/19.2 and can confirm it works fine now.

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