[Bug 59929] New: Excessive CPU usage in winedevice.exe and wineserver process with high polling rate gamepads

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59929

            Bug ID: 59929
           Summary: Excessive CPU usage in winedevice.exe and wineserver
                    process with high polling rate gamepads
           Product: Wine
           Version: 11.11
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: P2
         Component: wineserver
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Description: 

Playing games using gamepads with high polling rate joysticks (1KHz) will cause
winedevice & wineserver to massively spike CPU usage

How to reproduce:
- Use any gamepads that are *equipped with 1KHz joysticks* (very common with
Gamesir/Flydigi/8Bitdo that use HE/TMR joysticks) . 
- Open any game with Wine, and at the same time open any system monitoring
tool. 
- Wiggle both right and left joysticks. Watch the CPU usage of `wineserver` &
`winedevice` process spiking significantly as long as the joysticks are being
used 
- The issue does not present when using gamepad with default low polling rate
joysticks (125Hz)

Tested Wine version : 11.0-11.11, 10.11-10.20

This problem might, or might not be similar to the one reported in this
regarding mouse with high polling rate : 

https://bugs.winehq.org/show_bug.cgi?id=46976

however as far as current version of Wine in Arch repository (11.11-1.1) it's
still present. The issue is exacerbated if the games that are being played are
CPU intensive, since both are competing for CPU time. Which in turn causes
noticeable input delays, and sometimes burst of queued inputs after that delay
ends. Example of similar problems other people have been reporting : 

https://www.reddit.com/r/linux_gaming/comments/1srzbgm/8bitdoo_controller_la...

https://www.reddit.com/r/Bazzite/comments/1svvq33/i_get_a_strange_cpu_usage_...

https://www.reddit.com/r/Fedora/comments/1rrvmic/games_stutter_and_have_inpu...

This is quite problematic for gamepads that do not provide the ability to
change the default polling rate (like 8bitdo and Flydigi Vader 3 Pro that I
used, and some Gamesir models).

This issue does not affect native linux games. No significant CPU spikes on any
process observed when using the high polling rate joysticks in them.

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[Bug 59929] Excessive CPU usage in winedevice.exe and wineserver process with high polling rate gamepads

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59929

Ken Sharp <[e-mail]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |hardware
          Component|wineserver                  |-unknown
           Severity|major                       |normal

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