Windows 10: New D3D12 background shader optimizations for Windows 10 19H1

API details

Dynamic optimization state is controlled by a single new API:

Code: HRESULT ID3D12Device6::SetBackgroundProcessingMode(D3D12_BACKGROUND_PROCESSING_MODE Mode, D3D12_MEASUREMENTS_ACTION MeasurementsAction, HANDLE hEventToSignalUponCompletion, _Out_opt_ BOOL* FurtherMeasurementsDesired); enum D3D12_BACKGROUND_PROCESSING_MODE { D3D12_BACKGROUND_PROCESSING_MODE_ALLOWED, D3D12_BACKGROUND_PROCESSING_MODE_ALLOW_INTRUSIVE_MEASUREMENTS, D3D12_BACKGROUND_PROCESSING_MODE_DISABLE_BACKGROUND_WORK, D3D12_BACKGROUND_PROCESSING_MODE_DISABLE_PROFILING_BY_SYSTEM, }; enum D3D12_MEASUREMENTS_ACTION { D3D12_MEASUREMENTS_ACTION_KEEP_ALL, D3D12_MEASUREMENTS_ACTION_COMMIT_RESULTS, D3D12_MEASUREMENTS_ACTION_COMMIT_RESULTS_HIGH_PRIORITY, D3D12_MEASUREMENTS_ACTION_DISCARD_PREVIOUS, };[/quote]
The BACKGROUND_PROCESSING_MODE setting controls what level of dynamic optimization will apply to GPU work that is submitted in the future:

• ALLOWED is the default setting. The driver may instrument workloads and dynamically recompile shaders in a low overhead, non-intrusive manner which avoids glitching the foreground workload.
• ALLOW_INTRUSIVE_MEASUREMENTS indicates that the driver may instrument as aggressively as possible. Causing glitches is fine while in this mode, because the current work is being submitted specifically to train the system.
• DISABLE_BACKGROUND_WORK means stop it! No background shader recompiles that chew up CPU cycles, please.
• DISABLE_PROFILING_BY_SYSTEM means no, seriously, stop it for real! I’m doing an A/B performance comparison, and need the driver not to change ANYTHING that could mess up my results.

MEASUREMENTS_ACTION, on the other hand, indicates what should be done with the results of earlier workload instrumentation:

• KEEP_ALL – nothing to see here, just carry on as you are.
• COMMIT_RESULTS indicates that whatever the driver has measured so far is all the data it is ever going to see, so it should stop waiting for more and go ahead compiling optimized shaders. hEventToSignalUponCompletion will be signaled when all resulting compilations have finished.
• COMMIT_RESULTS_HIGH_PRIORITY is like COMMIT_RESULTS, but also indicates the app does not care about glitches, so the runtime should ignore the usual idle priority rules and go ahead using as many threads as possible to get shader recompiles done fast.
• DISCARD_PREVIOUS requests to reset the optimization state, hinting that whatever has previously been measured no longer applies.

Note that the DISABLE_BACKGROUND_WORK, DISABLE_PROFILING_BY_SYSTEM, and COMMIT_RESULTS_HIGH_PRIORITY options are only available in developer mode.

What about PIX?

PIX will automatically use SetBackgroundProcessingMode, first to prime the system and then to prevent any further changes from taking place in the middle of its analysis. It will wait on an event to make sure all background shader recompiles have finished before it starts taking measurements.

Since this will be handled automatically by PIX, the detail is only relevant if you’re building a similar tool of your own:

Code: BOOL wantMoreProfiling = true; int tries = 0; while (wantMoreProfiling && ++tries < MaxPassesInCaseDriverDoesntConverge) { SetBackgroundProcessingMode( D3D12_BACKGROUND_PROCESSING_MODE_ALLOW_INTRUSIVE_MEASUREMENTS, (tries == 0) ? D3D12_MEASUREMENTS_ACTION_DISCARD_PREVIOUS : D3D12_MEASUREMENTS_ACTION_KEEP_ALL, null, null); // play back the frame that is being analyzed SetBackgroundProcessingMode( D3D12_BACKGROUND_PROCESSING_MODE_DISABLE_PROFILING_BY_SYSTEM, D3D12_MEASUREMENTS_ACTION_COMMIT_RESULTS_HIGH_PRIORITY, handle, &wantMoreProfiling); WaitForSingleObject(handle); } // play back the frame 1+ more times while collecting timing data, // recording GPU counters, doing A/B perf comparisons, etc.[/quote] [/quote]
Source: New in D3D12 - background shader optimizations | DirectX Developer Blog

:)

 

Windows 10 Tweaks

Pressing “Windows+Pause Break” (it’s up there next to scroll lock) opens the “System” Window.

Windows 10: In the new version of Windows, Explorer has a section called Quick Access. This includes your frequent folders and recent files. Explorer defaults to opening this page when you open a new window. If you’d rather open the usual This PC, with links to your drives and library folders, follow these steps:

• Open a new Explorer window.
• Click View in the ribbon.
• Click Options.
• Under General, next to “Open File Explorer to:” choose “This PC.”
• Click OK

credit to Lifehacker.

 

Disk optimization scheduling in Windows 10

Hi,

Welcome to Microsoft Community.

I suggest you to follow the below steps and check if it helps.

• 
  In search select Defragment and optimize drives
  
• 
  Click on change settings
  
• 
  In optimization schedule
  
• 
  In frequency select the options accordingly.
  

Please let us know if you need further assistance.

Thank you.

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Windows 10 Task menu background transparency

Hi,

Thank you for your response.

Apologize for delay in reply.

As a workaround, I suggest you to change the desktop background/ remove the desktop background and check.

I suggest you to create a new user account and check if it fixes the issue. Refer to the steps below to create a new User Account:

• Go to Settings.
• Choose Accounts and then select Other User Accounts towards the left.
• Select Add an Account.
• Enter a user name and hit Next.
• Click on Finish.
• Sign out from the current Account and Log into the new account.
• Check if issue persists.

Please reply to us with the status of the issue.

Thanks.