What are the detailed meanings of some test items in DCGM Diag.cpp?

[irvingans]

Hi,
I have some lack of understandings of some test items in https://github.com/NVIDIA/DCGM/blob/master/dcgmi/Diag.cpp.
Are there any detailed explanations about the test items below?

1. Permissions and OS Blocks
2. Persistence Mode
3. Page Retirement/Row Remap
4. Targeted stress.

And why do we need tests regarding these items?

1. Environment Variables

### Tasks

[nikkon-dev]

@irvingans,

The dcgmi/Diag.cpp is just a launcher for the nvvs binary. Please take a look at this code

The software nvvs plugin checks if any known preconditions may affect/slow down further tests.
Usually, if the software tests fail, the system is misconfigured/requires a reboot, and should not be used in production.

[nikkon-dev]

Some description is also available here

[irvingans]

Hi @nikkon-dev , thanks for the explanations.
And now I have some more doubts regarding line 565-565 in https://github.com/NVIDIA/DCGM/blob/master/sdk/nvidia/nvml/nvml.h :

1. How does these factors(sync boost, board limit, low utilization, board reliability limit) cause the GPU to be below application clocks ?
2. What is the detailed meaning of board reliability limit ?

[irvingans]

Hi @aaronp24 , @lukeyeager , @aflat , any ideas for my questions above？