What is a UVM Component?
UVM components are non-transient, meaning they have a static nature and exist throughout the entire simulation. They are a constant part of the simulation environment.
What is a UVM Object?
On the other hand, UVM objects are transient. They are dynamic in nature and have a limited lifetime within the simulation. UVM objects are created and destroyed as needed during the simulation.
Difference between a UVM Object and a UVM Component
| Aspect | UVM Object | UVM Component |
|---|---|---|
| Purpose | Used to represent and manipulate data or information within a verification environment. They encapsulate data and may contain properties, methods, and functionality for data processing. | Used to model the hierarchical structure of the verification environment. They represent elements in the verification environment hierarchy, such as testbenches, agents, drivers, monitors, or test scenarios. |
| Hierarchy | UVM objects do not have a hierarchical structure like components. They are typically not organized in a tree-like fashion. | UVM components are organized in a hierarchical tree-like structure. They can have parent and child components, creating a hierarchical representation of the verification environment. |
| Instances | Multiple instances of UVM objects can exist in a simulation. These instances represent different data or information entities. | Typically, there is only one instance of each UVM component in a given simulation. UVM components represent different parts of the verification environment. |
| Interactions | UVM objects can interact with each other, communicate data, and be used to model the behavior of the design under verification or the test environment. | UVM components interact by means of the UVM hierarchy and communication mechanisms. They collaborate to orchestrate the verification process. |
| Inheritance | UVM objects may be derived from other UVM objects to inherit properties and methods. They are part of the UVM factory hierarchy. | UVM components can be derived from other UVM components to create a hierarchical structure. They inherit properties and methods related to the component. |
| Examples | UVM objects can represent transactions, registers, signals, or any data structures used in the verification process. | UVM components can represent various parts of the testbench, such as a top-level testbench, an interface, an agent, or a sequencer. |
