如何获取 Windows 中每个正在运行的进程的“专用 GPU 内存”编号（与 Windows 任务管理器中显示的编号相同）

Question

The Windows Task Manager, in the "Details" tab, shows the "Dedicated GPU memory" usage for every process. For example, I can currently see that chrome.exe uses 1.4 GB Dedicated GPU memory, dwm.exe uses 1.3 GB Dedicated GPU memory, and firefox.exe uses 0.78 GB Dedicated GPU memory.

I want to get that exact same data from my own C++ code. How can I do that in the easiest way?

I know that the Windows Task Manager only has that data since Windows 10, and I am fine with a solution that only works on Windows 10 and above.

The exact goal of my code is to find every process that uses more than 0.2 GB of Dedicated GPU memory. I want to have that information to show a message to the user of my software recommending closing those specific processes, because my software will run better if it has as much VRAM as possible available for itself.

Answer 1

Task manager and third party software are using performance counters to query the dedicated GPU memory information. For example you can execute these counters from powershell:

Get-Counter -Counter "\GPU Engine(*)\*"
Get-Counter -Counter "\GPU Engine(*)\Running Time"
Get-Counter -Counter "\GPU Engine(*)\Utilization Percentage"

Get-Counter -Counter "\GPU Local Adapter Memory(*)\*"
Get-Counter -Counter "\GPU Local Adapter Memory(*)\Local Usage"

Get-Counter -Counter "\GPU Non Local Adapter Memory(*)\*"
Get-Counter -Counter "\GPU Non Local Adapter Memory(*)\Non Local Usage"

Get-Counter -Counter "\GPU Process Memory(*)\*"
Get-Counter -Counter "\GPU Process Memory(*)\Dedicated Usage"
Get-Counter -Counter "\GPU Process Memory(*)\Local Usage"
Get-Counter -Counter "\GPU Process Memory(*)\Non Local Usage"
Get-Counter -Counter "\GPU Process Memory(*)\Shared Usage"
Get-Counter -Counter "\GPU Process Memory(*)\Total Committed"

You can query the same counters from c++ using the PdhAddCounter function. For example:

PdhAddCounter(..., L"\\GPU Process Memory(*)\\Dedicated Usage", ...)