Vitis Analyzer - 2023.2 English

Vitis Tutorials: AI Engine (XD100)

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2023.2 English

Vitis Analyzer is an essential tool for accessing information on compilation, simulation, and implementation of AI Engine graphs. It can be used to obtain a summary on profiling data and to graphically display trace events. The tool may be invoked with the vitis_analyzer command, or for this example, by entering:

$ make analyze

The Graph view displays connectivity of the AI Engine graph, which for this example, is displayed in Figure 8. This simple example shows the kernel, ping pong buffers on input and output ports, and two buffers for holding intermediate results.


Figure 8 - Vitis Analyzer Graph View

The Array view displays how the AI Engine graph is mapped to the AI Engine array for the device specified. This example uses a VC1902 Versal AI Core device which contains 400 AI Engine tiles. As shown in Figure 9, this example only utilizes two tiles.


Figure 9 - Vitis Analyzer Array View

Figure 10 contains information from the Profile view. The highlighted fields show that the bilinear interpolation kernel takes 2251 cycles to process 256 pixels of data. For lowest speed Versal devices, this would translate to a peak processing rate of ~113.7 MP/s. Highest speed devices would have a peak processing rate of ~142.1 MP/s.


Figure 10 - Vitis Analyzer Profile View