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Wait For VBlank

  • Article

This automated test verifies correct driver implementation of the vertical blank synchronization functionality that underlies the implementation of the IDirect3DDevice9Ex::WaitForVBlank method.

The test automatically runs against several display modes. For each mode, the test determines the expected interval between consecutive vertical retrace periods, based on the mode's refresh rate. It then performs 101 calls to the WaitForVBlank function and measures the 100 intervals between the return times. Each interval is expected to be comparable to the interval that the test predicted via the refresh rate. The test reports a failure if more than 10 percent of the intervals differ from the expected interval by more than 2 milliseconds.

This topic applies to the following test jobs:

  • Wait For VBlank

  • Wait For VBlank (WoW64)

Test details

   
Specifications
  • Device.Graphics.AdapterRender.MinimumDirectXLevel
Platforms
  • Windows 10, client editions (x86)
  • Windows 10, client editions (x64)
  • Windows Server 2016 (x64)
  • Windows 10, client editions (Arm64)
Supported Releases
  • Windows 10
  • Windows 10, version 1511
  • Windows 10, version 1607
  • Windows 10, version 1703
  • Windows 10, version 1709
  • Windows 10, version 1803
  • Windows 10, version 1809
  • Windows 10, version 1903
  • Next update to Windows 10
Expected run time (in minutes) 3
Category Compatibility
Timeout (in minutes) 180
Requires reboot false
Requires special configuration false
Type automatic

 

Additional documentation

Tests in this feature area might have additional documentation, including prerequisites, setup, and troubleshooting information, that can be found in the following topic(s):

Troubleshooting

For generic troubleshooting of HLK test failures, see Troubleshooting Windows HLK Test Failures.

For troubleshooting information, see Troubleshooting Device.Graphics Testing.

More information

Command syntax

Command option Description

Waitvbl.exe -M:1 -dx9 -whql -logclean

Runs the Wait For VBlank test job.

Waitvbl.exe -M:1 -whql -logclean

Runs the Wait For VBlank (WoW64) test job.

 

File list

File Location

Configdisplay.exe

<[testbinroot]>\nttest\windowstest\tools\

D3d10ref.dll

<[testbinroot]>\nttest\graphics\d3d\support\

D3d11ref.dll

<[testbinroot]>\nttest\windowstest\graphics\d3d\support\

D3dcompiler_test.dll

<[testbinroot]>\nttest\windowstest\graphics\d3d\support\

D3dref9.dll

<[testbinroot]>\nttest\windowstest\graphics\d3d\support

D3dx10_test.dll

<[testbinroot]>\nttest\windowstest\graphics\d3d\support\

D3dx11_test.dll

<[testbinroot]>\nttest\windowstest\graphics\d3d\support\

D3dx9_test.dll

<[testbinroot]>\nttest\windowstest\graphics\d3d\support\

Fpstate.dll

<[testbinroot]>\nttest\windowstest\graphics\d3d\utility\

Modechange.exe

<[testbinroot]>\nttest\windowstest\graphics\d3d\utility\

TDRWatch.exe

<[testbinroot]>\nttest\windowstest\graphics\

Vbswap.x

<[testbinroot]>\nttest\windowstest\graphics\d3d\conf\

Waitvbl.exe

<[testbinroot]>\nttest

 

Parameters

Parameter name Parameter description
MONITOR Index of display output to target with test
MODIFIEDCMDLINE Additional command line arguments for test executable
LLU_NetAccessOnly LLU Name of net user
ConfigDisplayCommandLine Custom Command Line for ConfigDisplay. Default: logo
TDRArgs /get or /set