[screen-devel] [bug #65631] Starting screen session detached causes higher than usual CPU usage

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?65631>

                 Summary: Starting screen session detached causes higher than
usual CPU usage
                   Group: GNU Screen
               Submitter: None
               Submitted: Tue 23 Apr 2024 03:18:56 PM UTC
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
                 Release: 4.9.0
         Discussion Lock: Any
           Fixed Release: None
         Planned Release: None
           Work Required: None


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Follow-up Comments:


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Date: Tue 23 Apr 2024 03:18:56 PM UTC By: Anonymous
Hello,

I've come across a problem with specifically screen with the switches -d -m.
The switches seem to cause the CPU usage to sit at around 100% single core
usage for the server and just over 50% usage for screen itself. Attaching
session also fails to pass keystrokes properly (keystrokes end up sending
outside of screen session for some reason?)

Issue seems to occur exclusively with BeamMP-Server (Multiplayer server for
BeamNG Drive, https://github.com/BeamMP/BeamMP-Server ).

screen ./BeamMP-Server <- no issues
screen -d -m ./BeamMP-Server <- High CPU usage

System Info:
Debian 12 (bookworm)
Kernel 6.1.0-20-amd64
Core2Duo E8400






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File Attachments:


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Name: screen@no@switches@.png  Size: 8KiB
<https://file.savannah.gnu.org/file/screen@no@switches@.png?file_id=55960>
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Name: running@outside@of@screen.png  Size: 9KiB
<https://file.savannah.gnu.org/file/running@outside@of@screen.png?file_id=55961>
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Name: screen@with@switches.png  Size: 8KiB
<https://file.savannah.gnu.org/file/screen@with@switches.png?file_id=55959>

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