Capella/Viewpoints/BasicPerformance

Purpose

The Performance viewpoint enables to simply describe the non-functional aspect of performance in Capella.

Scope

Performance information can be added on a Logical/Physical Component or graphically in LAB/PAB diagrams.

Principles

On a Functional Exchange or Function, an "Execution Time" indicator defines the execution time. A "Time Limit" defines the maximal execution accepted by a Functional Chain.

The Total Execution Time of a Functional Chain is the sum of the Execution Time of all the Functional Exchange and Function elements which compose the Functional Chain.

Graphically, when:

• Total Execution Time < Execution Limit: the Execution Limit is displayed in green.
• Total Execution Time = Execution Limit: the Execution Limit is displayed in orange.
• Total Execution Time > Execution Limit: the Execution Limit is displayed in red.

Practice

The Basic Performance viewpoint enriches the Capella palette with a new section composed of two icons:

• Function Time Consumption: it enables to state a level of time consumption of a Function or Functional Exchange.
• Functional Chain Consumption: it enables to state the maximum level of time consumption accepted by a Functional Chain.

Use of Function Time Consumption:

• Click on the icon and next on a Function or Functional Exchange.
• Set the execution time accessible in the 'Basic Performance' section of the Properties view.
• The Functional Chain Consumption is automatically recomputed and the color changes if needed.

Use of Functional Chain Consumption:

• Click on the icon and next on a functional chain.
• Set the Execution Time Limit accessible in the 'Basic Performance' section of the Properties view.
• The Functional Chain Consumption is automatically recomputed and the color changes if needed.