ZDoom

Hey there, long time no see.

Apologies for the rather anemic bug report -- I don't know if "stuttering" is even the best way to describe this behavior -- I just don't know what kind of diagnostics this would warrant.

I've been able to reproduce this on GZDoom 3.7.2, 4.1.3, and g4.2pre-324-g43041c21d-m. The issue is that the game freezes up every other second. This is most noticeable in the menu if I hold down one of the arrow keys, which I've attempted to record:

https://femto.pw/3p23.webm

I don't believe this is related to OpenGL or audio, as the issue persists with a null audio backend and the Doom software renderer.

I am running GuixSD on x86_64 Linux 5.1.3.

Log:

Spoiler:

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Code: Select all

GZDoom g4.2pre-324-g43041c21d-m - 2019-08-07 12:09:47 +0200 - SDL version
Compiled on Aug  7 2019

M_LoadDefaults: Load system defaults.
W_Init: Init WADfiles.
 adding /tmp/gzdoom/build/gzdoom.pk3, 608 lumps
 adding /tmp/gzdoom/build/game_support.pk3, 2520 lumps
 adding /home/jakob/Games/Doom/DOOM2.WAD, 2919 lumps
I_Init: Setting up machine state.
CPU Vendor ID: GenuineIntel
  Name: Intel(R) Core(TM) i5-2500 CPU @ 3.30GHz
  Family 6, Model 42, Stepping 7
  Features: SSE2 SSE3 SSSE3 SSE4.1 SSE4.2 HyperThreading
I_InitSound: Initializing OpenAL
  Opened device Built-in Audio Analog Stereo
  EFX enabled
V_Init: allocate screen.
S_Init: Setting up sound.
ST_Init: Init startup screen.
Checking cmd-line parameters...
S_InitData: Load sound definitions.
G_ParseMapInfo: Load map definitions.
Texman.Init: Init texture manager.
ParseTeamInfo: Load team definitions.
LoadActors: Load actor definitions.
script parsing took 339.57 ms
R_Init: Init Doom refresh subsystem.
DecalLibrary: Load decals.
M_Init: Init menus.
P_Init: Init Playloop state.
ParseSBarInfo: Loading custom status bar definition.
D_CheckNetGame: Checking network game status.
player 1 of 1 (1 nodes)
Using video driver x11
GL_VENDOR: X.Org
GL_RENDERER: AMD Radeon (TM) RX 460 Graphics (POLARIS11, DRM 3.30.0, 5.1.3, LLVM 8.0.0)
GL_VERSION: 4.5 (Core Profile) Mesa 19.1.1 (Core profile)
GL_SHADING_LANGUAGE_VERSION: 4.50

Max. texture size: 16384
Max. texture units: 32
Max. varying: 128
Max. combined shader storage blocks: 40
Max. vertex shader storage blocks: 8
Resolution: 1024 x 768
The futex facility returned an unexpected error code.Aborted

Could this be related to the issue you're having?

More importantly, does this only happen with GZDoom, or does it happen with other games as well?

Keep in mind that even when using the software renderer the final result is still presented by OpenGL in GZDoom.

I just tried launching GZDoom here and I don't see any stuttering at all. That's on a Windows system though. Last time I tried GZDoom on Linux is ran quite terribly. It had a very high frame rate yet at the same time it didn't feel remotely smooth. At the time I figured it was probably my Linux distro or the nvidia driver acting up.

[Armchair developer mode on]
If only someone experienced on linux would go ahead and make an equivalent version of polybackend for SDL2, it should be pretty easy.
[Armchair developer mode off]

You only have to implement 4 functions or so to support that branch on Linux. Nevertheless, it doesn't explain why OpenGL ran so poorly on my Linux machine last I tried it. I would have examined it closer if it was my primary platform for development, but I didn't have any clear indicator of what the problem was for me to fix it using joe.

I'd like to do it but i don't even use Linux, and i suspect this time copy-pasta won't cut it (from the old pure software SDL backend).

Talon1024 wrote:Could this be related to the issue you're having?

Sadly, no.

Talon1024 wrote:More importantly, does this only happen with GZDoom, or does it happen with other games as well?

My apologies, I just tried running EDuke32 and ioquake3 and found that they have the same issue. I thought the problem would lie in GZDoom as other games were working fine just a few days ago, but that's not the case any longer. I'll mark this as solved, since it's apparent that this is not GZDoom-related.