The inconsistency between filtering by kernel and patch

[bangtianliu]

Describe the bug I use OmniPerf to profile the execution of Stable Diffusion XL (SDXL) on MI300X, where a single matmul_transpose_b kernel is executed 180 times. My focus is on the performance behavior of this matmul_transpose_b kernel. However, when I tried to filter by kernel and dispatch, I noticed some inconsistencies. Please check the below snapshots for the details, in which you can see the difference in the reported L2 cache hit rate.

Development Environment:

• Linux Distribution: [Ubuntu 22.04.2 LTS]
• Omniperf Version: [ 2.0.1 (release)]
• GPU: [ MI300X]
• Custer (if applicable): [e.g. Crusher, ]

To Reproduce Steps to reproduce the behavior: Maybe just found one application that will run the same kernel many times on GPUs, and then check the difference between filtering by dispatch and kernel

Expected behavior A clear and concise description of what you expected to happen.

Screenshots

Additional context Add any other context about the problem here.

[coleramos425]

Thanks @bangtianliu. For the record, I've tried reproducing this issue on an MI250 with the latest version of Omniperf (e.g. dev) and could not find the issue. The next step in this ticket would be to try reproducing on an MI300X.

Assigning the issue to project PM for triage.