Snapshot and Device Duty Cycle - 2020.2 English

Xilinx Power Estimator User Guide for Versal ACAP (UG1275)

Document ID
Release Date
2020.2 English

Snapshots allow you to capture the summary of a design or a design state capturing total power and individual block powers for a particular configuration. The snapshot feature also displays the power supply summary for each power rail. This feature can be used to compare the power difference between two different configurations and helps in the design level if-else analysis.

Duty cycle feature is introduced for Versal™ devices. This feature helps you to determine the design power accurately based on the amount of time the design remains in a particular state. In real time designs, all blocks are not enabled for complete operation time. For example, some application use PS in high performance mode only for 50% of the design operational time, rest of the time it operates in Deep-Sleep mode. Similarly, it can be used for PL dynamic clock scaling, and for other blocks. The expected percentage of time a design is in a particular state can be provided to XPE. XPE then determines the weighted average of all the states based on the amount of time in each state. The weighted average is used to determine thermal solutions.

Figure 1. Snapshot Sheet
  • Average power is displayed only when the total percent of time in state = 100%
  • Reset to Defaults option in the Summary Sheet cannot clear the snapshot state. To clear the snapshot state you need to select Clear All in the Snapshot sheet.