Bug 111082

Summary:	Severe stutter in CS:GO surf servers, despite ~300fps
Product:	Mesa	Reporter:	nucrap
Component:	Drivers/Gallium/radeonsi	Assignee:	Default DRI bug account <dri-devel>
Status:	RESOLVED FIXED	QA Contact:	Default DRI bug account <dri-devel>
Severity:	normal
Priority:	medium	CC:	nucrap
Version:	19.1
Hardware:	x86-64 (AMD64)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description nucrap 2019-07-08 01:25:20 UTC

In general playing CS:GO is going really well, however when joining surf servers (a popular community game mode), despite having around 300fps the game stutters really badly.

To test if you can reproduce you will of course need to have CS:GO installed and join any surf server, for instance -> 217.79.188.156:27165

I hope somebody can reproduce this and maybe help :)

If nobody can, I might provide a video.

I am on archlinux with the following packages:
mesa v19.1.1, xf86-video-amdgpu 19.0.1

Comment 1 Timothy Arceri 2019-07-08 02:16:01 UTC

What makes you think this is a driver bug? Are you sure this is not just a slow connection between you and the community server? Or a slow server or any number of different things?

Sorry but I'm going to close this bug report as I see nothing to suggest this is a graphics driver bug.

Comment 2 nucrap 2019-07-08 03:20:44 UTC

How is this not a graphics driver bug?

Under Windows 10 I connect to the very same server and there is no stutter.

I actually think this is a driver bug. This has nothing to do with my connection.

Comment 3 Sylvain BERTRAND 2019-07-08 09:50:43 UTC

On Mon, Jul 08, 2019 at 03:20:44AM +0000, bugzilla-daemon@freedesktop.org wrote:
> How is this not a graphics driver bug?

He meant it could be a game engine bug (network or 3D, very probably).

You are both right.

CSGO 3D engine on based linux OSes is really bad if you use maps which are not
in the competitive set.

For instance, danger zone open maps, on my system, have disastrous
performance... and it is CPU related, not GPU, even though I have 8 core at
4.7Ghz (something is really wrong or litteraly CPU capped somewhere).

Comment 4 nucrap 2019-07-08 16:43:20 UTC

So maybe we should figure out if it is graphics driver related or a bug in the CS:GO engine?

Why has this bug report been set to "RESOLVED FIX"?

I understand claiming that this might not be a graphics driver bug, but it might pretty well be one. On which basis are reports closed here, on speculations?

In the end I want to help the Linux ecosystem and make games work, because now even though my own CSGO surf server is on Linux, I have to switch to Windows 10 to test it which is utterly ridiculus.

Comment 5 Sylvain BERTRAND 2019-07-08 17:00:50 UTC

I did report my CSGO performance pb to valve devs:
https://github.com/ValveSoftware/csgo-osx-linux/issues/1111

I have no idea if my CPU bound performance pb is in the driver (which is very
likely since it's opengl), or the 3D engine.

Comment 6 nucrap 2019-07-08 17:11:11 UTC

Hm, well as I said my fps are constantly very high, so it looks like a frame pacing issue. My CPU load is also super low and never above 50 % on a single core.

Of course this might be an issue with the Linux implementation of CS:GO, but I think it would be worth figuring out where exactly the culprit is. It can only be those two things: CS:GO or the graphics driver..

Comment 7 Sylvain BERTRAND 2019-07-08 19:18:31 UTC

> My CPU load is also super low and never above 50 % on a single
> core.

This is the issue: looks like cpu capping in the 3d engine.
But, since csgo 3d engine is direct3d designed, this is why vulkan.

linux csgo devs are the ones who can profile properly their game and figure out
the culprit.
(could be linux networking related too).

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.