Stream Stalls - 2021.2 English

Versal ACAP AI Engine Programming Environment User Guide (UG1076)

Document ID
UG1076
ft:locale
English (United States)
Release Date
2021-12-17
Version
2021.2 English

The driver of a cascade chain should be placed closer to the head of the cascade chain, if possible. This reduces routing latency for these long latency paths and can reduce the need for expensively large switch/DMA FIFOs.

Figure 1. Cascade Chain

  1. Make sure fifo_depth constraints have been specified for nets that require buffering.
  2. Minimize streams and favor windows.

If fifo_depth has been specified you can check the log for the FIFO report section in AIECompiler.log.