N6000 PL – DMA AFU Minimum Bandwidth Failure and 2MB Transfer Hang

[vijayaKesavan19]

Hi ,

We are testing the DMA AFU example design. Below are the details of our test setup:

Test Environment

• OS: Ubuntu 22.04.5
• Linux DFL kernel version: 5.15.92-dfl
• Platform: N6000 PL
• PCIe bifurcation: x8 x8
• OFS prebuilt binaries: n6001-images_ofs-2024-2-1
• Quartus version: 2024.1
• Hugepages Configuration

   Node Pages Size Total
   0 2048 2MB 4GB
   0 4 1GB 4GB

The software test log is attached as "OFS_2024-2-1_DMA_AFU_sw.log" for your reference.

Issues Observed

• “Minimum bandwidth requirement not met” when the transfer size is set to 16 KB
• The application runs indefinitely when the transfer size is set to 2 MB

Could you kindly clarify the root cause of this issue and advise on the resolution steps

Thanks and regards,
Vijayakesavan