Flushing dirty L2 cache lines

[rnaza005]

Hi,

I have seen NV_UFLUSH_L2_FLUSH_DIRTY and MEM_OP_D_OPERATION_L2_FLUSH_DIRTY in NVIDIA Driver.
I wonder if these definitions can be utilized to flush dirty lines in GPU L2 cache.
Also if possible, how can I use them in my program?

Thanks in advance,
Ravan.

[AastaLLL]

Hi,

Could you share more info about where you found the “NV_UFLUSH_L2_FLUSH_DIRTY” and “MEM_OP_D_OPERATION_L2_FLUSH_DIRTY”?
Do you find it from the iGPU driver or dGPU driver?

Thanks.

[rnaza005]

Hello,

Thanks for your response.
I have found this in one of dGPU driver, 390.48. I checked it is available on later versions as well (470, open-source drivers as well).
For example, one of the file that contains this definition is clc06f.h inside kernel/nvidia-uvm folder.

I hope this information is useful.
Thanks.

[AastaLLL]

Hi

PX2 is not using the dGPU driver.
Do you also find the same definition on the DRIVE?

Thanks.

[rnaza005]

Hi

I have NVIDIA GTX 1060 and 3060. I have looked through different drivers. As I said, in 390.48, 470, and the latest open-source one, I found these definitions.

One example is below:

Thanks.

[AastaLLL]

Hi,

Is your question specified to DRIVE OS?
Or is it for general desktop GPU?

The mechanism for dGPU and iGPU is different.
Thanks.

[rnaza005]

Hi,

My question is regarding the general desktop GPU. Specificall, it is about their drivers.

Thanks,
Ravan.

[AastaLLL]

Thanks. Will move your topic to the dGPU board.

[kayccc]

Suggest to open your issue at Latest CUDA/CUDA Programming and Performance topics - NVIDIA Developer Forums for better support on dGPU questions. Sorry for that.

[rnaza005]

Thanks, I have opened this issue at suggested forum.
Sorry for inconvenience.

Thanks AastaLLL for your efforts.

Best.