[Bug 52564] New: dxgi:dxgi times out in test_find_closest_matching_mode() on cw-gtx560

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52564

            Bug ID: 52564
           Summary: dxgi:dxgi times out in
                    test_find_closest_matching_mode() on cw-gtx560
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: directx-d3d
          Assignee: wine-bugs at winehq.org
          Reporter: fgouget at codeweavers.com
      Distribution: ---

When run in Wine, dxgi:dxgi times out in test_find_closest_matching_mode() on
cw-gtx560:

$ WINETEST_NO_MT_D3D=1 WINETEST_TIME=1 ./wine dlls/dxgi/tests/dxgi_test.exe
dxgi
[...]
dxgi.c:1582:1.778 mode_count=130
dxgi.c:1585:1.778 i=0
dxgi.c:1585:2.452 i=1
dxgi.c:1585:3.123 i=2
dxgi.c:1585:3.867 i=3
dxgi.c:1585:4.806 i=4
dxgi.c:1585:5.929 i=5
dxgi.c:1585:7.061 i=6
dxgi.c:1585:8.187 i=7
dxgi.c:1585:9.332 i=8
dxgi.c:1585:10.542 i=9
[...]
dxgi.c:1656:139.600 
[...]
0020:dxgi:188.618 12836 tests executed (203 marked as todo, 2 failures), 35
skipped.

https://test.winehq.org/data/patterns.html#dxgi:dxgi

The problem is that it slows down after the first few modes, taking 1060 ms on
average. And there are 130 modes to test so the test hits the 120 second limit.

This issue started with the commit below.

commit 1f2c3e8538b088f678a588121fc0bf7811336efc
Author: Jacek Caban <jacek at codeweavers.com>
Date:   Wed Dec 1 16:02:43 2021 +0100

    win32u: Move NtUserEnumDisplaySettings implementation from user32.

    Signed-off-by: Jacek Caban <jacek at codeweavers.com>
    Signed-off-by: Huw Davies <huw at codeweavers.com>
    Signed-off-by: Alexandre Julliard <julliard at winehq.org>

Before that commit test_find_closest_matching_mode() was much faster.

dxgi.c:1582:1.558 mode_count=130
dxgi.c:1585:1.558 i=0
dxgi.c:1585:1.751 i=1
dxgi.c:1585:1.960 i=2
dxgi.c:1585:2.168 i=3
dxgi.c:1585:2.361 i=4
dxgi.c:1585:2.570 i=5
dxgi.c:1585:2.763 i=6
dxgi.c:1585:2.939 i=7
dxgi.c:1585:3.132 i=8
dxgi.c:1585:3.309 i=9
[...]
dxgi.c:1656:25.519
[...]
0020:dxgi:63.668 12835 tests executed (203 marked as todo, 2 failures), 35
skipped.

(184 ms on average)

Note: cw-rx460 does not have this issue because it has fewer modes to test
(20), and testing each mode is much faster too (28 ms on average).

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