Long Run Times - 2022.2 English

Vitis HLS Messaging (UG1448)

Document ID
UG1448
Release Date
2022-12-16
Version
2022.2 English

Description

Warning: [200-868] Skip long run time warning caused by lots of load/store instructions.

This message reports long run times caused by a large number of loads and store instructions.

Explanation

The number of load/store operations are caused by one of the following reasons:

  • Completely partitioning arrays size > 1024
  • Completely unrolling large loops loops
  • An excessive number of operations generated by the tool

Solution

There are two potential solutions:
Array partitioning
Divide the single dimension into multiple and partition the desired dim by a factor. This will reduce the amount of operations generated.
Loop Unrolling
Move the source code into multiple separate functions and unroll each of them. This will result in fewer operations or refactor the code or unroll it with a factor.