Wait for VBlank
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
Associated requirements |
Device.Graphics.AdapterRender.MinimumDirectXLevel |
Platforms |
Windows 7 (x64) Windows 7 (x86) Windows RT (ARM-based) Windows 8 (x64) Windows 8 (x86) Windows Server 2012 (x64) Windows Server 2008 R2 (x64) Windows RT 8.1 Windows 8.1 x64 Windows 8.1 x86 Windows Server 2012 R2 |
Expected run time |
~3 minutes |
Categories |
Certification Functional |
Type |
Automated |
Prerequisites
Before you run the test, complete the test setup as described in the test requirements: Graphic Adapter or Chipset Testing Prerequisites.
Troubleshooting
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 |