Bug 36918

Summary:	ETQW: Enabling "Soft Particles" causes major performance issue
Product:	Mesa	Reporter:	Sven Arvidsson <sa>
Component:	Drivers/Gallium/r600	Assignee:	Default DRI bug account <dri-devel>
Status:	RESOLVED NOTOURBUG	QA Contact:
Severity:	normal
Priority:	medium
Version:	git
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Sven Arvidsson 2011-05-06 12:30:49 UTC

Enabling the option "Soft Particles" in the game Enemy Territory Quake Wars causes a major performance drop to ~ 1 fps, CPU goes to 100% so I'm guessing some sort of software fallback is hit?

Options → Settings → Advanced → Soft Particles

I'll see if r300g has the same problem, if so it's probably a more general problem.

System environment:
-- system architecture: 32-bit
-- Linux distribution: Debian unstable
-- GPU: REDWOOD
-- Model: XFX Radeon HD 5670 1GB
-- Display connector: DVI
-- xf86-video-ati: 6.14.1
-- xserver: 1.10.1
-- mesa: 27d3e0b25cc3f2bd9f72778f0c9f54cb90c48622
-- drm: 2.4.25
-- kernel: 2.6.39-rc5

Comment 1 almos 2011-05-07 09:19:49 UTC

It does the same with r300g on rv350. I found that this feature is blacklisted on ATI cards (the option is grayed out on windows), but Mesa rX00g is not detected as an ATI card.

Comment 2 Sven Arvidsson 2011-05-07 13:23:15 UTC

That's good to know, I guess this can be closed as NOTOURBUG unless somebody thinks otherwise.

Comment 3 Sven Arvidsson 2011-06-11 09:54:26 UTC

I don't think there's much reason to keep this open.

Comment 4 almos 2012-01-15 12:53:47 UTC

Now I tried it with mesa master on a barts pro, and soft particles don't cause any noticeable slowdown.

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