[Bug 45072] Enabling csmt causes 100% CPU use in MikuMikuDance

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=45072

Fabian Maurer <dark.shadow4 at web.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
                URL|                            |http://www.geocities.jp/hig
                   |                            |uchuu4/pict/MikuMikuDanceE_
                   |                            |v931.zip
            Summary|Wine 3.6 causes 100% CPU    |Enabling csmt causes 100%
                   |use in MikuMikuDance        |CPU use in MikuMikuDance
             Status|UNCONFIRMED                 |NEW
           Keywords|                            |download
          Component|-unknown                    |directx-d3d
                 CC|                            |dark.shadow4 at web.de

--- Comment #3 from Fabian Maurer <dark.shadow4 at web.de> ---
Bisected it to

commit dd0ea0a61463db83c647a9367ca61e2b69a98eb3 (refs/bisect/bad)
Author: Henri Verbeet <hverbeet at codeweavers.com>
Date:   Fri Feb 16 09:39:08 2018 +0330

    wined3d: Enable the multi-threaded command stream by default.

However, this doesn't really help, since it's not a regression in that sense.

> CSMT is controlled through the registry key HKCU/Software/Wine/Direct3D/csmt,
> which is a DWORD value. Setting the key to 0 will disable the feature, while
> setting it to 1 will enable the feature. 

Disabling csmt returns the CPU usage to normal levels with wine-3.7.

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