What are the usage of verbosity in UVM?
Verbosity Levels In simple terms, this controls whether a uvm_report_* statement gets displayed or not. If we have configured the verbosity settings to UVM_HIGH, then it means that we expect every uvm_report_* or `uvm_* message with a verbosity level less than UVM_HIGH to be printed out.
What is UVM fatal?
`uvm_fatal(ID,MSG) Calls uvm_report_fatal with a verbosity of UVM_NONE. The message can not be turned off using the reporter’s verbosity setting, but can be turned off by setting the action for the message. ID is given as the message tag and MSG is given as the message text.
What is verbosity level in UVM?
Fundamentally the Verbosity level describes how verbose a Testbench can be. The default Verbosity is UVM_MEDIUM. There are different Verbosity level being supported by UVM. These are UVM_NONE, UVM_LOW, UVM_MEDIUM (Default), UVM_HIGH, UVM_FULL, UVM_DEBUG.
How do you set UVM verbosity?
You can control the verbosity of a component from command line as a simulation argument. There are two choices: +uvm_set_verbosity=,,, +uvm_set_verbosity=,,,time, This one lets you specify the simulation time you want the applied verbosity to start.
What are UVM phases?
UVM Common Phases
| UVM Common Phases | The common phases are the set of function and task phases that all uvm_components execute together. |
|---|---|
| uvm_check_phase | Check for any unexpected conditions in the verification environment. |
| uvm_report_phase | Report results of the test. |
| uvm_final_phase | Tie up loose ends. |
What is main phase in UVM?
main phase is where the stimulus specified by the Test case is generated and applied to the DUT. It completes in two conditions: One is the stimulus gets exhausted and another is when timeout occurs. Sequences are started in this phase to generate the stimulus.
Why phases are used in UVM?
The reason why UVM came up with such phases is because synchronization among all design-testbench was necessary. Using Verilog and VHDL, verification engineers did not have facilities such as clocking block or run phases. That is the main reason why UVM has different phases.
What are the UVM phases?
Main UVM Phases
| Phase Category | UVM Phase Name | Method Type |
|---|---|---|
| Build | start_of_simulation_phase | function |
| Run | run_phase | task |
| Clean | extract_phase | function |
| check_phase | function |
What is difference between Create and new in UVM?
The create function goes through the UVM factory and checks for registered type or instance overrides. The new function is a SystemVerilog constructor for an object and is called everytime an object is to be created (whether through the factory or not).
What is function new in UVM?
– In UVM, we use new() to create an class object and it is not registered to UVM factory. If you want to register your class object (uvm_object/uvm_component) to UVM factory, you must use “create” method.
Which is the lowest verbosity message in UVM?
We generally use following verbosity levels while coding uvm_info prints. The values are the integer values of enumeration. Please note that, though from name UVM_LOW seems to be low priority, but in actual its second highest priority message and similarly UVM_FULL is among lowest priority messages.
What does UVM high mean in UVM report?
If we have configured the verbosity settings to UVM_HIGH, then it means that we expect every uvm_report_* or `uvm_* message with a verbosity level less than UVM_HIGH to be printed out. If you have configured it to UVM_LOW, then only UVM_LOW and UVM_NONE lines will be dumped out. Default configuration is UVM_MEDIUM.
When to use UVM full or UVM debug?
Never use UVM_DEBUG unless you are trying to debug an issue with the UVM base class library. Keep UVM_FULL or UVM_HIGH as your highest level ( Recieved this valuable suggestion from Dave)
How to use UVM library and code the TB?
UVM is a methodology where all the common requirements for a TB are coded and created as a library, and set of guidlines are given on how to use the UVM library and code the TB. – Methodology brings uniformity in the TB development flow.