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UVM テストベンチのスコアボードのパラメーターとカバレッジ目標を変更する

この例では次を使用します。

この例では、 Simulink®から生成された UVM テストベンチで応答チェッカーのパラメーターを制御する方法を示します。このようなパラメータ化は、設計検証エンジニアがさまざまなテストシナリオでスコアボードを再利用するのに役立ちます。チェッカーへのSimulinkパラメーターは、派生テストクラス (ランダム化または非ランダム化) で、またはコマンドライン plusarg を介して直接設定できる値を設定する構成オブジェクトになります。

設計の説明と UVM テストベンチ生成の背景については、サンプルSimulinkからパラメーター化された UVM テストベンチを生成を参照してください。

UVM テストベンチの生成

まず、プロジェクトとモデルを開きます。

openProject('pulsedetector_proj');
model = 'pulsedetector_tb';
open_system(model);

この例のデフォルトの UVM テストベンチを生成するには、次を実行します。

design     = [model '/PulseDetector'];
sequence   = [model '/GenPulse'];
scoreboard = [model '/CheckDetection'];
predictor  = [model '/PulseDetectorRef'];
driver     = [model '/InputDriver'];
monitor    = [model '/OutputMonitor'];
uvmbuild(design, sequence, scoreboard, Predictor=predictor, Driver=driver, Monitor=monitor);

### Starting DPI subsystem generation for UVM test bench
### Starting build procedure for model: PulseDetector
### Starting SystemVerilog DPI Component Generation
### Generating DPI H Wrapper PulseDetector_dpi.h
### Generating DPI C Wrapper PulseDetector_dpi.c
### Generating UVM module package PulseDetector_dpi_pkg.sv
### Generating SystemVerilog module PulseDetector_dpi.sv
### Generating makefiles for: PulseDetector_dpi
### Invoking make to build the DPI Shared Library
### Successful completion of build procedure for model: PulseDetector

Build Summary

Top model targets built:

Model          Action                        Rebuild Reason                                    
===============================================================================================
PulseDetector  Code generated and compiled.  Code generation information file does not exist.  

1 of 1 models built (0 models already up to date)
Build duration: 0h 0m 58.21s
### Starting build procedure for model: GenPulse
### Starting SystemVerilog DPI Component Generation
### Generating DPI H Wrapper GenPulse_dpi.h
### Generating DPI C Wrapper GenPulse_dpi.c
### Generating UVM module package GenPulse_dpi_pkg.sv
### Generating SystemVerilog module GenPulse_dpi.sv
### Generating makefiles for: GenPulse_dpi
### Invoking make to build the DPI Shared Library
### Successful completion of build procedure for model: GenPulse

Build Summary

Top model targets built:

Model     Action                        Rebuild Reason                                    
==========================================================================================
GenPulse  Code generated and compiled.  Code generation information file does not exist.  

1 of 1 models built (0 models already up to date)
Build duration: 0h 0m 31.474s
### Starting build procedure for model: InputDriver
### Starting SystemVerilog DPI Component Generation
### Generating DPI H Wrapper InputDriver_dpi.h
### Generating DPI C Wrapper InputDriver_dpi.c
### Generating UVM module package InputDriver_dpi_pkg.sv
### Generating SystemVerilog module InputDriver_dpi.sv
### Generating makefiles for: InputDriver_dpi
### Invoking make to build the DPI Shared Library
### Successful completion of build procedure for model: InputDriver

Build Summary

Top model targets built:

Model        Action                        Rebuild Reason                                    
=============================================================================================
InputDriver  Code generated and compiled.  Code generation information file does not exist.  

1 of 1 models built (0 models already up to date)
Build duration: 0h 0m 22.829s
### Starting build procedure for model: OutputMonitor
### Starting SystemVerilog DPI Component Generation
### Generating DPI H Wrapper OutputMonitor_dpi.h
### Generating DPI C Wrapper OutputMonitor_dpi.c
### Generating UVM module package OutputMonitor_dpi_pkg.sv
### Generating SystemVerilog module OutputMonitor_dpi.sv
### Generating makefiles for: OutputMonitor_dpi
### Invoking make to build the DPI Shared Library
### Successful completion of build procedure for model: OutputMonitor

Build Summary

Top model targets built:

Model          Action                        Rebuild Reason                                    
===============================================================================================
OutputMonitor  Code generated and compiled.  Code generation information file does not exist.  

1 of 1 models built (0 models already up to date)
Build duration: 0h 0m 22.874s
### Starting build procedure for model: CheckDetection
### Starting SystemVerilog DPI Component Generation
### Generating DPI H Wrapper CheckDetection_dpi.h
### Generating DPI C Wrapper CheckDetection_dpi.c
### Generating UVM module package CheckDetection_dpi_pkg.sv
### Generating SystemVerilog module CheckDetection_dpi.sv
### Generating makefiles for: CheckDetection_dpi
### Invoking make to build the DPI Shared Library
### Successful completion of build procedure for model: CheckDetection

Build Summary

Top model targets built:

Model           Action                        Rebuild Reason                                    
================================================================================================
CheckDetection  Code generated and compiled.  Code generation information file does not exist.  

1 of 1 models built (0 models already up to date)
Build duration: 0h 0m 39.196s
### Starting build procedure for model: PulseDetectorRef
### Starting SystemVerilog DPI Component Generation
### Generating DPI H Wrapper PulseDetectorRef_dpi.h
### Generating DPI C Wrapper PulseDetectorRef_dpi.c
### Generating UVM module package PulseDetectorRef_dpi_pkg.sv
### Generating SystemVerilog module PulseDetectorRef_dpi.sv
### Generating makefiles for: PulseDetectorRef_dpi
### Invoking make to build the DPI Shared Library
### Successful completion of build procedure for model: PulseDetectorRef

Build Summary

Top model targets built:

Model             Action                        Rebuild Reason                                    
==================================================================================================
PulseDetectorRef  Code generated and compiled.  Code generation information file does not exist.  

1 of 1 models built (0 models already up to date)
Build duration: 0h 0m 23.232s
### Starting UVM test bench generation for model: pulsedetector_tb
### Generating UVM transaction object ./uvm_build/pulsedetector_tb_uvm_testbench/scoreboard/mw_PulseDetector_scoreboard_trans.sv
### Generating UVM interface ./uvm_build/pulsedetector_tb_uvm_testbench/uvm_artifacts/mw_PulseDetector_if.sv
### Generating UVM sequence ./uvm_build/pulsedetector_tb_uvm_testbench/sequence/mw_PulseDetector_sequence.sv
### Generating UVM sequencer ./uvm_build/pulsedetector_tb_uvm_testbench/sequence/mw_PulseDetector_sequencer.sv
### Generating UVM sequence transaction ./uvm_build/pulsedetector_tb_uvm_testbench/sequence/mw_PulseDetector_sequence_trans.sv
### Generating UVM driver ./uvm_build/pulsedetector_tb_uvm_testbench/driver/mw_PulseDetector_driver.sv
### Generating UVM monitor ./uvm_build/pulsedetector_tb_uvm_testbench/monitor/mw_PulseDetector_monitor.sv
### Generating UVM input monitor ./uvm_build/pulsedetector_tb_uvm_testbench/uvm_artifacts/mw_PulseDetector_monitor_input.sv
### Generating UVM Reference Model ./uvm_build/pulsedetector_tb_uvm_testbench/predictor/mw_PulseDetector_predictor.sv
### Generating UVM transaction object ./uvm_build/pulsedetector_tb_uvm_testbench/predictor/mw_PulseDetector_predictor_trans.sv
### Generating UVM agent ./uvm_build/pulsedetector_tb_uvm_testbench/uvm_artifacts/mw_PulseDetector_agent.sv
### Generating UVM scoreboard ./uvm_build/pulsedetector_tb_uvm_testbench/scoreboard/mw_PulseDetector_scoreboard.sv
### Generating UVM scoreboard configuration object ./uvm_build/pulsedetector_tb_uvm_testbench/scoreboard/mw_PulseDetector_scoreboard_cfg_obj.sv
### Generating UVM environment ./uvm_build/pulsedetector_tb_uvm_testbench/uvm_artifacts/mw_PulseDetector_environment.sv
### Generating UVM test ./uvm_build/pulsedetector_tb_uvm_testbench/uvm_artifacts/mw_PulseDetector_test.sv
### Generating UVM top ./uvm_build/pulsedetector_tb_uvm_testbench/top/mw_PulseDetector_top.sv
### Generating UVM test package ./uvm_build/pulsedetector_tb_uvm_testbench/top/pulsedetector_tb_pkg.sv
### Generating UVM test bench simulation script for Mentor Graphics QuestaSim/Modelsim ./uvm_build/pulsedetector_tb_uvm_testbench/top/run_tb_mq.do
### Generating UVM test bench simulation script for Cadence Xcelium ./uvm_build/pulsedetector_tb_uvm_testbench/top/run_tb_xcelium.sh
### Generating UVM test bench simulation script for Synopsys VCS ./uvm_build/pulsedetector_tb_uvm_testbench/top/run_tb_vcs.sh

スコアボードのパラメータ化

このモデルでは、応答チェックは、アサーションチェックブロックで使用されるエラーしきい値変数によってパラメータ化されます。これは、 Simulink.Parameter要素pErrorThresholdを使用して、SystemVerilog モデルに保持するパラメーターとして指定されます。この仕様では、デフォルト値として 5.0 パーセントが与えられており、これはゴールデンリファレンスと実際の DUT の間の誤差の差の許容範囲を反映しています。(このテストベンチでの不一致は、検出ロジックの倍精度実装と固定小数点実装によるものです。)

scoreboard block mask showing that the upper bound parameter is set to pErrorThreshold.

生成された UVM コードでは、パラメーターは構成オブジェクトmw_PulseDetector_scoreboard_cfg_objに配置されます。

mw_PulseDetector_scoreboard_cfg_obj.svを参照してください。

mw_PulseDetector_scoreboard_cfg_obj構成オブジェクトは、テストのビルド段階でインスタンス化されます ( mw_PulseDetector_test )。

mw_PulseDetector_test.svを参照してください。

スコアボードのmw_PulseDetector_scoreboard_cfg_objのuvm_config_dbデータベースを介して、 mw_PulseDetector_scoreboard 構成オブジェクトをstart_of_simulation_phaseに設定します。関数。

mw_PulseDetector_scoreboard.svを参照してください。

プラス引数を使用したエラーしきい値の更新

テスト計画では当初、許容誤差を 5.0% としていた。後で、より安全性が重要な要件を反映するために設計仕様が 1.0% に厳しくなった場合は、コマンドラインを使用してこれを行うことができます。サポートスクリプトは、環境変数を使用して、SystemVerilog コマンドラインと引数に影響を与えます。

提供されたスクリプトには、Questa® を実行する環境用のMathWorks固有のセットアップが含まれています。インストールに一致するようにコマンドを調整するか、別のシミュレーターの使用を選択します。

current_simulator = 'Questa';
setup_questa();

次に、UVM シミュレーションに影響を与える環境変数をクリアします。

setenv EXTRA_UVM_SIM_ARGS
setenv EXTRA_UVM_COMP_ARGS
setenv UVM_TOP_MODULE

次に、シミュレーターを選択し、plusarg オーバーライドを使用して UVM テストベンチをシミュレートします。

cd uvm_build/pulsedetector_tb_uvm_testbench/top

% Simulate with an SNR of 2.0 and an error threshold of 1.0 percent.
setenv EXTRA_UVM_SIM_ARGS '+SNR_default_inp_val=10000000 +RTWStructParam_pErrorThreshold=1.0'
switch current_simulator
    case 'Questa',     ! vsim -c -do run_tb_mq.do
    case 'Questa_gui', ! vsim -do run_tb_mq.do
    case 'Xcelium',    ! ./run_tb_xcelium.sh
    case 'VCS',        ! ./run_tb_vcs.sh
end

Reading pref.tcl

# 2022.2

# do run_tb_mq.do
# +SNR_default_inp_val=10000000 +RTWStructParam_pErrorThreshold=1.0
# mw_PulseDetector_top.sv
# QuestaSim-64 vlog 2022.2 Compiler 2022.04 Apr 25 2022
# Start time: 17:37:23 on Jun 14,2023
# vlog -timescale 1ns/1ns ../DPI_dut/PulseDetector_dpi_pkg.sv ../sequence/GenPulse_dpi_pkg.sv ../scoreboard/CheckDetection_dpi_pkg.sv ../driver/InputDriver_dpi_pkg.sv ../monitor/OutputMonitor_dpi_pkg.sv ../predictor/PulseDetectorRef_dpi_pkg.sv pulsedetector_tb_pkg.sv mw_PulseDetector_top.sv "+define+MG_SIM" 
# -- Compiling package PulseDetector_dpi_pkg
# -- Compiling package GenPulse_dpi_pkg
# -- Compiling package CheckDetection_dpi_pkg
# -- Compiling package InputDriver_dpi_pkg
# -- Compiling package OutputMonitor_dpi_pkg
# -- Compiling package PulseDetectorRef_dpi_pkg
# ** Note: (vlog-2286) pulsedetector_tb_pkg.sv(5): Using implicit +incdir+/mathworks/hub/3rdparty/R2023a/8709182/share/Questasim/Lin/uvm-1.1d/../verilog_src/uvm-1.1d/src from import uvm_pkg
# -- Compiling package pulsedetector_tb_pkg
# -- Importing package mtiUvm.uvm_pkg (uvm-1.1d Built-in)
# -- Importing package GenPulse_dpi_pkg
# -- Importing package CheckDetection_dpi_pkg
# -- Importing package PulseDetectorRef_dpi_pkg
# -- Importing package InputDriver_dpi_pkg
# -- Importing package OutputMonitor_dpi_pkg
# ** Warning: ** while parsing file included at mw_PulseDetector_top.sv(5)
# ** at ../DPI_dut/PulseDetector_dpi.sv(15): (vlog-13314) Defaulting port 'coeff_in' kind to 'var' rather than 'wire' due to default compile option setting of -svinputport=relaxed.
# -- Compiling package mw_PulseDetector_top_sv_unit
# -- Importing package PulseDetector_dpi_pkg
# -- Importing package pulsedetector_tb_pkg
# -- Compiling module PulseDetector_dpi
# ** Warning: ../DPI_dut/PulseDetector_dpi.sv(15): (vlog-13314) Defaulting port 'coeff_in' kind to 'var' rather than 'wire' due to default compile option setting of -svinputport=relaxed.
# -- Compiling interface mw_PulseDetector_if
# -- Compiling module mw_PulseDetector_top
# 
# Top level modules:
# 	mw_PulseDetector_top
# End time: 17:37:24 on Jun 14,2023, Elapsed time: 0:00:01
# Errors: 0, Warnings: 2
# vsim "+SNR_default_inp_val=10000000" "+RTWStructParam_pErrorThreshold=1.0" -L work -voptargs="+acc" -sv_lib ../DPI_dut/PulseDetector -sv_lib ../sequence/GenPulse -sv_lib ../scoreboard/CheckDetection -sv_lib ../driver/InputDriver -sv_lib ../monitor/OutputMonitor -sv_lib ../predictor/PulseDetectorRef "+UVM_TESTNAME=mw_PulseDetector_test" mw_PulseDetector_top "+define+MG_SIM" 
# Start time: 17:37:24 on Jun 14,2023
# ** Note: (vsim-3812) Design is being optimized...
# ** Warning: (vopt-10587) Some optimizations are turned off because the +acc switch is in effect. This will cause your simulation to run slowly. Please use -access/-debug to maintain needed visibility.
# ** Warning: ../DPI_dut/PulseDetector_dpi.sv(15): (vopt-13314) Defaulting port 'coeff_in' kind to 'var' rather than 'wire' due to default compile option setting of -svinputport=relaxed.
# ** Note: (vsim-12126) Error and warning message counts have been restored: Errors=0, Warnings=2.
# //  Questa Sim-64
# //  Version 2022.2 linux_x86_64 Apr 25 2022
# //
# //  Copyright 1991-2022 Mentor Graphics Corporation
# //  All Rights Reserved.
# //
# //  QuestaSim and its associated documentation contain trade
# //  secrets and commercial or financial information that are the property of
# //  Mentor Graphics Corporation and are privileged, confidential,
# //  and exempt from disclosure under the Freedom of Information Act,
# //  5 U.S.C. Section 552. Furthermore, this information
# //  is prohibited from disclosure under the Trade Secrets Act,
# //  18 U.S.C. Section 1905.
# //
# Loading sv_std.std
# Loading work.mw_PulseDetector_if(fast)
# Loading work.OutputMonitor_dpi_pkg(fast)
# Loading work.InputDriver_dpi_pkg(fast)
# Loading work.PulseDetectorRef_dpi_pkg(fast)
# Loading work.CheckDetection_dpi_pkg(fast)
# Loading work.GenPulse_dpi_pkg(fast)
# Loading mtiUvm.uvm_pkg(fast)
# Loading work.pulsedetector_tb_pkg(fast)
# Loading work.PulseDetector_dpi_pkg(fast)
# Loading work.mw_PulseDetector_top_sv_unit(fast)
# Loading mtiUvm.questa_uvm_pkg(fast)
# Loading work.mw_PulseDetector_top(fast)
# Loading work.mw_PulseDetector_if(fast__2)
# Loading work.PulseDetector_dpi(fast)
# Loading ./../DPI_dut/PulseDetector.so
# Loading ./../sequence/GenPulse.so
# Loading ./../scoreboard/CheckDetection.so
# Loading ./../driver/InputDriver.so
# Loading ./../monitor/OutputMonitor.so
# Loading ./../predictor/PulseDetectorRef.so
# Loading /mathworks/hub/3rdparty/R2023a/8709182/share/Questasim/Lin/uvm-1.1d/linux_x86_64/uvm_dpi.so
# ----------------------------------------------------------------
# UVM-1.1d
# (C) 2007-2013 Mentor Graphics Corporation
# (C) 2007-2013 Cadence Design Systems, Inc.
# (C) 2006-2013 Synopsys, Inc.
# (C) 2011-2013 Cypress Semiconductor Corp.
# ----------------------------------------------------------------
# 
#   ***********       IMPORTANT RELEASE NOTES         ************
# 
#   You are using a version of the UVM library that has been compiled
#   with `UVM_NO_DEPRECATED undefined.
#   See http://www.eda.org/svdb/view.php?id=3313 for more details.
# 
#   You are using a version of the UVM library that has been compiled
#   with `UVM_OBJECT_MUST_HAVE_CONSTRUCTOR undefined.
#   See http://www.eda.org/svdb/view.php?id=3770 for more details.
# 
#       (Specify +UVM_NO_RELNOTES to turn off this notice)
# 
# UVM_INFO verilog_src/questa_uvm_pkg-1.2/src/questa_uvm_pkg.sv(277) @ 0: reporter [Questa UVM] QUESTA_UVM-1.2.3
# UVM_INFO verilog_src/questa_uvm_pkg-1.2/src/questa_uvm_pkg.sv(278) @ 0: reporter [Questa UVM]  questa_uvm::init(+struct)
# UVM_INFO @ 0: reporter [RNTST] Running test mw_PulseDetector_test...
# ** Info: Gathering coverage for           2 Simulink verify() calls.
#    Time: 0 ns  Scope: CheckDetection_dpi_pkg.VerifyInterfaceT.initVerifyInfo File: ../scoreboard/CheckDetection_dpi_pkg.sv Line: 251
# 
# [FrameNum=  0] No peak found in Ref or Impl.
# 
# [FrameNum=  1] PREDICTED: Peak location=2163.000000, mag-squared=0.280 using global max
# 
# [FrameNum=  1] ACTUAL   : Peak location=2170.000000, mag-squared=0.285 using global max
# 
# [FrameNum=  1] DIFF     : Peak location=7, mag-squared=0.004 (1.551%)
# ** Error: pulsedetector_tb:744:
#    Time: 50020 ns  Scope: pulsedetector_tb_pkg.mw_PulseDetector_scoreboard.run_phase File: ../scoreboard/mw_PulseDetector_scoreboard.sv Line: 84
# ** Error: pulsedetector_tb:744: At step 'inferred verify call' verify id 'CheckDetection/CheckDetection/Check Static 
# Upper Bound' Failed
#    Time: 50020 ns  Scope: CheckDetection_dpi_pkg.VerifyInterfaceT.checkVerifyStatus File: ../scoreboard/CheckDetection_dpi_pkg.sv Line: 347
# 
# [FrameNum=  2] PREDICTED: Peak location=2163.000000, mag-squared=0.200 using global max
# 
# [FrameNum=  2] ACTUAL   : Peak location=2170.000000, mag-squared=0.194 using global max
# 
# [FrameNum=  2] DIFF     : Peak location=7, mag-squared=0.006 (2.881%)
# ** Error: pulsedetector_tb:744:
#    Time: 100020 ns  Scope: pulsedetector_tb_pkg.mw_PulseDetector_scoreboard.run_phase File: ../scoreboard/mw_PulseDetector_scoreboard.sv Line: 84
# ** Error: pulsedetector_tb:744: At step 'inferred verify call' verify id 'CheckDetection/CheckDetection/Check Static 
# Upper Bound' Failed
#    Time: 100020 ns  Scope: CheckDetection_dpi_pkg.VerifyInterfaceT.checkVerifyStatus File: ../scoreboard/CheckDetection_dpi_pkg.sv Line: 347
# 
# [FrameNum=  3] PREDICTED: Peak location=2163.000000, mag-squared=0.224 using global max
# 
# [FrameNum=  3] ACTUAL   : Peak location=2170.000000, mag-squared=0.234 using global max
# 
# [FrameNum=  3] DIFF     : Peak location=7, mag-squared=0.010 (4.623%)
# ** Error: pulsedetector_tb:744:
#    Time: 150020 ns  Scope: pulsedetector_tb_pkg.mw_PulseDetector_scoreboard.run_phase File: ../scoreboard/mw_PulseDetector_scoreboard.sv Line: 84
# ** Error: pulsedetector_tb:744: At step 'inferred verify call' verify id 'CheckDetection/CheckDetection/Check Static 
# Upper Bound' Failed
#    Time: 150020 ns  Scope: CheckDetection_dpi_pkg.VerifyInterfaceT.checkVerifyStatus File: ../scoreboard/CheckDetection_dpi_pkg.sv Line: 347
# 
# [FrameNum=  4] PREDICTED: Peak location=2163.000000, mag-squared=0.200 using global max
# 
# [FrameNum=  4] ACTUAL   : Peak location=2170.000000, mag-squared=0.209 using global max
# 
# [FrameNum=  4] DIFF     : Peak location=7, mag-squared=0.009 (4.346%)
# ** Error: pulsedetector_tb:744:
#    Time: 200020 ns  Scope: pulsedetector_tb_pkg.mw_PulseDetector_scoreboard.run_phase File: ../scoreboard/mw_PulseDetector_scoreboard.sv Line: 84
# ** Error: pulsedetector_tb:744: At step 'inferred verify call' verify id 'CheckDetection/CheckDetection/Check Static 
# Upper Bound' Failed
#    Time: 200020 ns  Scope: CheckDetection_dpi_pkg.VerifyInterfaceT.checkVerifyStatus File: ../scoreboard/CheckDetection_dpi_pkg.sv Line: 347
# 
# [FrameNum=  5] PREDICTED: Peak location=2163.000000, mag-squared=0.255 using global max
# 
# [FrameNum=  5] ACTUAL   : Peak location=2170.000000, mag-squared=0.257 using global max
# 
# [FrameNum=  5] DIFF     : Peak location=7, mag-squared=0.002 (0.735%)
# 
# [FrameNum=  6] PREDICTED: Peak location=2163.000000, mag-squared=0.241 using global max
# 
# [FrameNum=  6] ACTUAL   : Peak location=2170.000000, mag-squared=0.250 using global max
# 
# [FrameNum=  6] DIFF     : Peak location=7, mag-squared=0.009 (3.660%)
# ** Error: pulsedetector_tb:744:
#    Time: 300020 ns  Scope: pulsedetector_tb_pkg.mw_PulseDetector_scoreboard.run_phase File: ../scoreboard/mw_PulseDetector_scoreboard.sv Line: 84
# ** Error: pulsedetector_tb:744: At step 'inferred verify call' verify id 'CheckDetection/CheckDetection/Check Static 
# Upper Bound' Failed
#    Time: 300020 ns  Scope: CheckDetection_dpi_pkg.VerifyInterfaceT.checkVerifyStatus File: ../scoreboard/CheckDetection_dpi_pkg.sv Line: 347
# 
# [FrameNum=  7] PREDICTED: Peak location=2163.000000, mag-squared=0.241 using global max
# 
# [FrameNum=  7] ACTUAL   : Peak location=2170.000000, mag-squared=0.243 using global max
# 
# [FrameNum=  7] DIFF     : Peak location=7, mag-squared=0.002 (0.790%)
# 
# [FrameNum=  8] PREDICTED: Peak location=2163.000000, mag-squared=0.225 using global max
# 
# [FrameNum=  8] ACTUAL   : Peak location=2170.000000, mag-squared=0.231 using global max
# 
# [FrameNum=  8] DIFF     : Peak location=7, mag-squared=0.007 (3.076%)
# ** Error: pulsedetector_tb:744:
#    Time: 400020 ns  Scope: pulsedetector_tb_pkg.mw_PulseDetector_scoreboard.run_phase File: ../scoreboard/mw_PulseDetector_scoreboard.sv Line: 84
# ** Error: pulsedetector_tb:744: At step 'inferred verify call' verify id 'CheckDetection/CheckDetection/Check Static 
# Upper Bound' Failed
#    Time: 400020 ns  Scope: CheckDetection_dpi_pkg.VerifyInterfaceT.checkVerifyStatus File: ../scoreboard/CheckDetection_dpi_pkg.sv Line: 347
# 
# [FrameNum=  9] PREDICTED: Peak location=2163.000000, mag-squared=0.239 using global max
# 
# [FrameNum=  9] ACTUAL   : Peak location=2170.000000, mag-squared=0.254 using global max
# 
# [FrameNum=  9] DIFF     : Peak location=7, mag-squared=0.015 (6.083%)
# ** Error: pulsedetector_tb:744:
#    Time: 450020 ns  Scope: pulsedetector_tb_pkg.mw_PulseDetector_scoreboard.run_phase File: ../scoreboard/mw_PulseDetector_scoreboard.sv Line: 84
# ** Error: pulsedetector_tb:744: At step 'inferred verify call' verify id 'CheckDetection/CheckDetection/Check Static 
# Upper Bound' Failed
#    Time: 450020 ns  Scope: CheckDetection_dpi_pkg.VerifyInterfaceT.checkVerifyStatus File: ../scoreboard/CheckDetection_dpi_pkg.sv Line: 347
# 
# [FrameNum= 10] PREDICTED: Peak location=2163.000000, mag-squared=0.225 using global max
# 
# [FrameNum= 10] ACTUAL   : Peak location=2170.000000, mag-squared=0.230 using global max
# 
# [FrameNum= 10] DIFF     : Peak location=7, mag-squared=0.005 (2.242%)
# ** Error: pulsedetector_tb:744:
#    Time: 500020 ns  Scope: pulsedetector_tb_pkg.mw_PulseDetector_scoreboard.run_phase File: ../scoreboard/mw_PulseDetector_scoreboard.sv Line: 84
# ** Error: pulsedetector_tb:744: At step 'inferred verify call' verify id 'CheckDetection/CheckDetection/Check Static 
# Upper Bound' Failed
#    Time: 500020 ns  Scope: CheckDetection_dpi_pkg.VerifyInterfaceT.checkVerifyStatus File: ../scoreboard/CheckDetection_dpi_pkg.sv Line: 347
# 
# [FrameNum= 11] PREDICTED: Peak location=2163.000000, mag-squared=0.207 using global max
# 
# [FrameNum= 11] ACTUAL   : Peak location=2170.000000, mag-squared=0.221 using global max
# 
# [FrameNum= 11] DIFF     : Peak location=7, mag-squared=0.014 (6.697%)
# ** Error: pulsedetector_tb:744:
#    Time: 550020 ns  Scope: pulsedetector_tb_pkg.mw_PulseDetector_scoreboard.run_phase File: ../scoreboard/mw_PulseDetector_scoreboard.sv Line: 84
# ** Error: pulsedetector_tb:744: At step 'inferred verify call' verify id 'CheckDetection/CheckDetection/Check Static 
# Upper Bound' Failed
#    Time: 550020 ns  Scope: CheckDetection_dpi_pkg.VerifyInterfaceT.checkVerifyStatus File: ../scoreboard/CheckDetection_dpi_pkg.sv Line: 347
# 
# [FrameNum= 12] PREDICTED: Peak location=2163.000000, mag-squared=0.265 using global max
# 
# [FrameNum= 12] ACTUAL   : Peak location=2170.000000, mag-squared=0.260 using global max
# 
# [FrameNum= 12] DIFF     : Peak location=7, mag-squared=0.005 (2.014%)
# ** Error: pulsedetector_tb:744:
#    Time: 600020 ns  Scope: pulsedetector_tb_pkg.mw_PulseDetector_scoreboard.run_phase File: ../scoreboard/mw_PulseDetector_scoreboard.sv Line: 84
# ** Error: pulsedetector_tb:744: At step 'inferred verify call' verify id 'CheckDetection/CheckDetection/Check Static 
# Upper Bound' Failed
#    Time: 600020 ns  Scope: CheckDetection_dpi_pkg.VerifyInterfaceT.checkVerifyStatus File: ../scoreboard/CheckDetection_dpi_pkg.sv Line: 347
# UVM_INFO verilog_src/uvm-1.1d/src/base/uvm_objection.svh(1267) @ 650000: reporter [TEST_DONE] 'run' phase is ready to proceed to the 'extract' phase
# ** Info: Instance coverage for verify 'pulsedetector_tb:757', coverpoint 'pass_cp': metric=100.00, at_least=   1 (   COVERED)
#    Time: 650 us  Scope: CheckDetection_dpi_pkg.VerifyInterfaceT.reportVerifyCoverage File: ../scoreboard/CheckDetection_dpi_pkg.sv Line: 369
# ** Info: Instance coverage for verify 'pulsedetector_tb:744', coverpoint 'pass_cp': metric=100.00, at_least=   1 (   COVERED)
#    Time: 650 us  Scope: CheckDetection_dpi_pkg.VerifyInterfaceT.reportVerifyCoverage File: ../scoreboard/CheckDetection_dpi_pkg.sv Line: 369
# ** Info: Overall coverage for CheckDetection_dpi_verify_calls: metric=100.00 (   COVERED)
#    Time: 650 us  Scope: CheckDetection_dpi_pkg.VerifyInterfaceT.reportVerifyCoverage File: ../scoreboard/CheckDetection_dpi_pkg.sv Line: 376
# 
# --- UVM Report Summary ---
# 
# ** Report counts by severity
# UVM_INFO :    4
# UVM_WARNING :    0
# UVM_ERROR :    0
# UVM_FATAL :    0
# ** Report counts by id
# [Questa UVM]     2
# [RNTST]     1
# [TEST_DONE]     1
# ** Note: $finish    : /mathworks/hub/3rdparty/R2023a/8709182/share/Questasim/Lin/linux_x86_64/../verilog_src/uvm-1.1d/src/base/uvm_root.svh(430)
#    Time: 650 us  Iteration: 61  Instance: /mw_PulseDetector_top
# End time: 17:37:46 on Jun 14,2023, Elapsed time: 0:00:22
# Errors: 20, Warnings: 2

cd ../../..

SNR が 2.0 の場合、デザインはほとんどの場合、新しい 1.0 パーセントの誤差しきい値に違反していることがわかります。

プラス引数を使用したエラーしきい値のカバレッジ目標の変更

メモ: UVM テストベンチでのカバーグループの生成と収集には、Simulink Test™ が必要です。

「カバレッジ目標」を設定することで、エラーしきい値を満たす必要がある検出フレームの数を指定できます。verify()呼び出しを含む Test Assessment ブロックと Test Sequence ブロック、Assertion ブロック、およびSimulink Model Verification ブロックはすべてカバレッジ情報を生成します。詳細については、 SystemVerilog アサーションと機能カバレッジの生成およびサンプルSimulink Testverify呼び出しからの SystemVerilog での機能カバレッジの生成を参照してください。

このモデルでは、Checker サブシステムの Check Static Upper Bound ブロックは、生成された UVM テストベンチでpulsedetector_tb:744のカバレッジ ID を持ちます。EXTRA_UVM_SIM_ARGSの + 引数を使用して、代替の SNR 値、エラーしきい値、およびカバレッジ目標を設定できます。以下に例を示します。

13 フレームすべてがエラーしきい値を通過する必要があることを表します。SNR が 2.0 でしきい値が 5% の場合、1 つまたは 2 つのフレームがしきい値を満たさないことがよくあるため、このカバレッジ目標は達成されない可能性があります。

setenv EXTRA_UVM_SIM_ARGS '+SNR_default_inp_val=10000000 +RTWStructParam_pErrorThreshold=5.0 +pulsedetector_tb:744=13'

誤差のしきい値を上げて、境界線の予測値と実際の比較を排除します。このしきい値により、カバレッジ目標を達成できます。

setenv EXTRA_UVM_SIM_ARGS '+SNR_default_inp_val=10000000 +RTWStructParam_pErrorThreshold=10.0 +pulsedetector_tb:744=13'

5% のエラーしきい値を維持し、カバレッジ目標の成功率を低く設定します。

setenv EXTRA_UVM_SIM_ARGS '+SNR_default_inp_val=10000000 +RTWStructParam_pErrorThreshold=5.0 +pulsedetector_tb:744=8'

テストでデフォルト構成オブジェクトを使用してエラーしきい値をランダム化する

スコアボード構成オブジェクトはメンバーであるため、テストから直接値を生成および設定できます。ここでは、[4.00, 8.00] パーセントの範囲でしきい値をランダム化します。しきい値はrealタイプであるため、直接ランダム化することはできません。

mw_PulseDetector_SCRPRM_param_overrides.svを参照してください。

これらの新しいクラスを使用して UVM シミュレーションを実行するには、環境変数を通じて追加の引数を指定して元のスクリプトを使用できます。

cd uvm_build/pulsedetector_tb_uvm_testbench/top
setenv EXTRA_UVM_COMP_ARGS '-f ../../../overrides_SCRPRM/extra_comp_args.f'
setenv EXTRA_UVM_SIM_ARGS '+SNR_default_inp_val=10000000 +UVM_TESTNAME=mw_PulseDetector_test_SCRPRM'
switch current_simulator
    case 'Questa',     ! vsim -c -do run_tb_mq.do
    case 'Questa_gui', ! vsim -do run_tb_mq.do
    case 'Xcelium',    ! ./run_tb_xcelium.sh
    case 'VCS',        ! ./run_tb_vcs.sh
end

Reading pref.tcl

# 2022.2

# do run_tb_mq.do
# -f ../../../overrides_SCRPRM/extra_comp_args.f
# +SNR_default_inp_val=10000000 +UVM_TESTNAME=mw_PulseDetector_test_SCRPRM
# mw_PulseDetector_top.sv
# ** Warning: (vlib-34) Library already exists at "work".
# Errors: 0, Warnings: 1
# QuestaSim-64 vlog 2022.2 Compiler 2022.04 Apr 25 2022
# Start time: 17:37:47 on Jun 14,2023
# vlog -timescale 1ns/1ns ../DPI_dut/PulseDetector_dpi_pkg.sv ../sequence/GenPulse_dpi_pkg.sv ../scoreboard/CheckDetection_dpi_pkg.sv ../driver/InputDriver_dpi_pkg.sv ../monitor/OutputMonitor_dpi_pkg.sv ../predictor/PulseDetectorRef_dpi_pkg.sv pulsedetector_tb_pkg.sv -f ../../../overrides_SCRPRM/extra_comp_args.f mw_PulseDetector_top.sv "+define+MG_SIM" 
# -- Compiling package PulseDetector_dpi_pkg
# -- Compiling package GenPulse_dpi_pkg
# -- Compiling package CheckDetection_dpi_pkg
# -- Compiling package InputDriver_dpi_pkg
# -- Compiling package OutputMonitor_dpi_pkg
# -- Compiling package PulseDetectorRef_dpi_pkg
# ** Note: (vlog-2286) pulsedetector_tb_pkg.sv(5): Using implicit +incdir+/mathworks/hub/3rdparty/R2023a/8709182/share/Questasim/Lin/uvm-1.1d/../verilog_src/uvm-1.1d/src from import uvm_pkg
# -- Compiling package pulsedetector_tb_pkg
# -- Importing package mtiUvm.uvm_pkg (uvm-1.1d Built-in)
# -- Importing package GenPulse_dpi_pkg
# -- Importing package CheckDetection_dpi_pkg
# -- Importing package PulseDetectorRef_dpi_pkg
# -- Importing package InputDriver_dpi_pkg
# -- Importing package OutputMonitor_dpi_pkg
# -- Compiling package pulsedetector_tb_extension_pkg
# -- Importing package pulsedetector_tb_pkg
# ** Warning: ../../../overrides_SCRPRM/./mw_PulseDetector_SCRPRM_param_overrides.sv(76): (vlog-2240) Treating stand-alone use of function 'randomize' as an implicit VOID cast.
# ** Warning: ** while parsing file included at mw_PulseDetector_top.sv(5)
# ** at ../DPI_dut/PulseDetector_dpi.sv(15): (vlog-13314) Defaulting port 'coeff_in' kind to 'var' rather than 'wire' due to default compile option setting of -svinputport=relaxed.
# ** Warning: ../DPI_dut/PulseDetector_dpi.sv(6): (vlog-13233) Design unit "mw_PulseDetector_top_sv_unit" already exists and will be overwritten. Design unit compiled with different set of options.
# -- Compiling package mw_PulseDetector_top_sv_unit
# -- Importing package PulseDetector_dpi_pkg
# -- Importing package pulsedetector_tb_extension_pkg
# -- Compiling module PulseDetector_dpi
# ** Warning: ../DPI_dut/PulseDetector_dpi.sv(15): (vlog-13314) Defaulting port 'coeff_in' kind to 'var' rather than 'wire' due to default compile option setting of -svinputport=relaxed.
# -- Compiling interface mw_PulseDetector_if
# -- Compiling module mw_PulseDetector_top
# 
# Top level modules:
# 	mw_PulseDetector_top
# End time: 17:37:47 on Jun 14,2023, Elapsed time: 0:00:00
# Errors: 0, Warnings: 4
# vsim "+SNR_default_inp_val=10000000" "+UVM_TESTNAME=mw_PulseDetector_test_SCRPRM" -L work -voptargs="+acc" -sv_lib ../DPI_dut/PulseDetector -sv_lib ../sequence/GenPulse -sv_lib ../scoreboard/CheckDetection -sv_lib ../driver/InputDriver -sv_lib ../monitor/OutputMonitor -sv_lib ../predictor/PulseDetectorRef "+UVM_TESTNAME=mw_PulseDetector_test" mw_PulseDetector_top "+define+MG_SIM" 
# Start time: 17:37:47 on Jun 14,2023
# ** Note: (vsim-3813) Design is being optimized due to module recompilation...
# ** Warning: (vopt-10587) Some optimizations are turned off because the +acc switch is in effect. This will cause your simulation to run slowly. Please use -access/-debug to maintain needed visibility.
# ** Warning: ../../../overrides_SCRPRM/./mw_PulseDetector_SCRPRM_param_overrides.sv(76): (vopt-2240) Treating stand-alone use of function 'randomize' as an implicit VOID cast.
# ** Warning: ../DPI_dut/PulseDetector_dpi.sv(15): (vopt-13314) Defaulting port 'coeff_in' kind to 'var' rather than 'wire' due to default compile option setting of -svinputport=relaxed.
# ** Note: (vsim-12126) Error and warning message counts have been restored: Errors=0, Warnings=3.
# //  Questa Sim-64
# //  Version 2022.2 linux_x86_64 Apr 25 2022
# //
# //  Copyright 1991-2022 Mentor Graphics Corporation
# //  All Rights Reserved.
# //
# //  QuestaSim and its associated documentation contain trade
# //  secrets and commercial or financial information that are the property of
# //  Mentor Graphics Corporation and are privileged, confidential,
# //  and exempt from disclosure under the Freedom of Information Act,
# //  5 U.S.C. Section 552. Furthermore, this information
# //  is prohibited from disclosure under the Trade Secrets Act,
# //  18 U.S.C. Section 1905.
# //
# Loading sv_std.std
# Loading work.mw_PulseDetector_if(fast)
# Loading work.OutputMonitor_dpi_pkg(fast)
# Loading work.InputDriver_dpi_pkg(fast)
# Loading work.PulseDetectorRef_dpi_pkg(fast)
# Loading work.CheckDetection_dpi_pkg(fast)
# Loading work.GenPulse_dpi_pkg(fast)
# Loading mtiUvm.uvm_pkg(fast)
# Loading work.pulsedetector_tb_pkg(fast)
# Loading work.pulsedetector_tb_extension_pkg(fast)
# Loading work.PulseDetector_dpi_pkg(fast)
# Loading work.mw_PulseDetector_top_sv_unit(fast)
# Loading mtiUvm.questa_uvm_pkg(fast)
# Loading work.mw_PulseDetector_top(fast)
# Loading work.mw_PulseDetector_if(fast__2)
# Loading work.PulseDetector_dpi(fast)
# Loading ./../DPI_dut/PulseDetector.so
# Loading ./../sequence/GenPulse.so
# Loading ./../scoreboard/CheckDetection.so
# Loading ./../driver/InputDriver.so
# Loading ./../monitor/OutputMonitor.so
# Loading ./../predictor/PulseDetectorRef.so
# Loading /mathworks/hub/3rdparty/R2023a/8709182/share/Questasim/Lin/uvm-1.1d/linux_x86_64/uvm_dpi.so
# ----------------------------------------------------------------
# UVM-1.1d
# (C) 2007-2013 Mentor Graphics Corporation
# (C) 2007-2013 Cadence Design Systems, Inc.
# (C) 2006-2013 Synopsys, Inc.
# (C) 2011-2013 Cypress Semiconductor Corp.
# ----------------------------------------------------------------
# 
#   ***********       IMPORTANT RELEASE NOTES         ************
# 
#   You are using a version of the UVM library that has been compiled
#   with `UVM_NO_DEPRECATED undefined.
#   See http://www.eda.org/svdb/view.php?id=3313 for more details.
# 
#   You are using a version of the UVM library that has been compiled
#   with `UVM_OBJECT_MUST_HAVE_CONSTRUCTOR undefined.
#   See http://www.eda.org/svdb/view.php?id=3770 for more details.
# 
#       (Specify +UVM_NO_RELNOTES to turn off this notice)
# 
# UVM_INFO verilog_src/questa_uvm_pkg-1.2/src/questa_uvm_pkg.sv(277) @ 0: reporter [Questa UVM] QUESTA_UVM-1.2.3
# UVM_INFO verilog_src/questa_uvm_pkg-1.2/src/questa_uvm_pkg.sv(278) @ 0: reporter [Questa UVM]  questa_uvm::init(+struct)
# UVM_WARNING @ 0: reporter [MULTTST] Multiple (2) +UVM_TESTNAME arguments provided on the command line.  'mw_PulseDetector_test_SCRPRM' will be used.  Provided list: mw_PulseDetector_test_SCRPRM, mw_PulseDetector_test.
# UVM_INFO @ 0: reporter [RNTST] Running test mw_PulseDetector_test_SCRPRM...
# UVM_INFO ../../../overrides_SCRPRM/./mw_PulseDetector_SCRPRM_param_overrides.sv(28) @ 0: uvm_test_top [mw_PulseDetector_test_SCRPRM] Setting error threshold to 5.200 percent
# 
# ** Info: Gathering coverage for           2 Simulink verify() calls.
#    Time: 0 ns  Scope: CheckDetection_dpi_pkg.VerifyInterfaceT.initVerifyInfo File: ../scoreboard/CheckDetection_dpi_pkg.sv Line: 251
# 
# [FrameNum=  0] No peak found in Ref or Impl.
# 
# [FrameNum=  1] PREDICTED: Peak location=2163.000000, mag-squared=0.280 using global max
# 
# [FrameNum=  1] ACTUAL   : Peak location=2170.000000, mag-squared=0.285 using global max
# 
# [FrameNum=  1] DIFF     : Peak location=7, mag-squared=0.004 (1.551%)
# 
# [FrameNum=  2] PREDICTED: Peak location=2163.000000, mag-squared=0.200 using global max
# 
# [FrameNum=  2] ACTUAL   : Peak location=2170.000000, mag-squared=0.194 using global max
# 
# [FrameNum=  2] DIFF     : Peak location=7, mag-squared=0.006 (2.881%)
# 
# [FrameNum=  3] PREDICTED: Peak location=2163.000000, mag-squared=0.224 using global max
# 
# [FrameNum=  3] ACTUAL   : Peak location=2170.000000, mag-squared=0.234 using global max
# 
# [FrameNum=  3] DIFF     : Peak location=7, mag-squared=0.010 (4.623%)
# 
# [FrameNum=  4] PREDICTED: Peak location=2163.000000, mag-squared=0.200 using global max
# 
# [FrameNum=  4] ACTUAL   : Peak location=2170.000000, mag-squared=0.209 using global max
# 
# [FrameNum=  4] DIFF     : Peak location=7, mag-squared=0.009 (4.346%)
# 
# [FrameNum=  5] PREDICTED: Peak location=2163.000000, mag-squared=0.255 using global max
# 
# [FrameNum=  5] ACTUAL   : Peak location=2170.000000, mag-squared=0.257 using global max
# 
# [FrameNum=  5] DIFF     : Peak location=7, mag-squared=0.002 (0.735%)
# 
# [FrameNum=  6] PREDICTED: Peak location=2163.000000, mag-squared=0.241 using global max
# 
# [FrameNum=  6] ACTUAL   : Peak location=2170.000000, mag-squared=0.250 using global max
# 
# [FrameNum=  6] DIFF     : Peak location=7, mag-squared=0.009 (3.660%)
# 
# [FrameNum=  7] PREDICTED: Peak location=2163.000000, mag-squared=0.241 using global max
# 
# [FrameNum=  7] ACTUAL   : Peak location=2170.000000, mag-squared=0.243 using global max
# 
# [FrameNum=  7] DIFF     : Peak location=7, mag-squared=0.002 (0.790%)
# 
# [FrameNum=  8] PREDICTED: Peak location=2163.000000, mag-squared=0.225 using global max
# 
# [FrameNum=  8] ACTUAL   : Peak location=2170.000000, mag-squared=0.231 using global max
# 
# [FrameNum=  8] DIFF     : Peak location=7, mag-squared=0.007 (3.076%)
# 
# [FrameNum=  9] PREDICTED: Peak location=2163.000000, mag-squared=0.239 using global max
# 
# [FrameNum=  9] ACTUAL   : Peak location=2170.000000, mag-squared=0.254 using global max
# 
# [FrameNum=  9] DIFF     : Peak location=7, mag-squared=0.015 (6.083%)
# ** Error: pulsedetector_tb:744:
#    Time: 450020 ns  Scope: pulsedetector_tb_pkg.mw_PulseDetector_scoreboard.run_phase File: ../scoreboard/mw_PulseDetector_scoreboard.sv Line: 84
# ** Error: pulsedetector_tb:744: At step 'inferred verify call' verify id 'CheckDetection/CheckDetection/Check Static 
# Upper Bound' Failed
#    Time: 450020 ns  Scope: CheckDetection_dpi_pkg.VerifyInterfaceT.checkVerifyStatus File: ../scoreboard/CheckDetection_dpi_pkg.sv Line: 347
# 
# [FrameNum= 10] PREDICTED: Peak location=2163.000000, mag-squared=0.225 using global max
# 
# [FrameNum= 10] ACTUAL   : Peak location=2170.000000, mag-squared=0.230 using global max
# 
# [FrameNum= 10] DIFF     : Peak location=7, mag-squared=0.005 (2.242%)
# 
# [FrameNum= 11] PREDICTED: Peak location=2163.000000, mag-squared=0.207 using global max
# 
# [FrameNum= 11] ACTUAL   : Peak location=2170.000000, mag-squared=0.221 using global max
# 
# [FrameNum= 11] DIFF     : Peak location=7, mag-squared=0.014 (6.697%)
# ** Error: pulsedetector_tb:744:
#    Time: 550020 ns  Scope: pulsedetector_tb_pkg.mw_PulseDetector_scoreboard.run_phase File: ../scoreboard/mw_PulseDetector_scoreboard.sv Line: 84
# ** Error: pulsedetector_tb:744: At step 'inferred verify call' verify id 'CheckDetection/CheckDetection/Check Static 
# Upper Bound' Failed
#    Time: 550020 ns  Scope: CheckDetection_dpi_pkg.VerifyInterfaceT.checkVerifyStatus File: ../scoreboard/CheckDetection_dpi_pkg.sv Line: 347
# 
# [FrameNum= 12] PREDICTED: Peak location=2163.000000, mag-squared=0.265 using global max
# 
# [FrameNum= 12] ACTUAL   : Peak location=2170.000000, mag-squared=0.260 using global max
# 
# [FrameNum= 12] DIFF     : Peak location=7, mag-squared=0.005 (2.014%)
# UVM_INFO verilog_src/uvm-1.1d/src/base/uvm_objection.svh(1267) @ 650000: reporter [TEST_DONE] 'run' phase is ready to proceed to the 'extract' phase
# ** Info: Instance coverage for verify 'pulsedetector_tb:757', coverpoint 'pass_cp': metric=100.00, at_least=   1 (   COVERED)
#    Time: 650 us  Scope: CheckDetection_dpi_pkg.VerifyInterfaceT.reportVerifyCoverage File: ../scoreboard/CheckDetection_dpi_pkg.sv Line: 369
# ** Info: Instance coverage for verify 'pulsedetector_tb:744', coverpoint 'pass_cp': metric=100.00, at_least=   1 (   COVERED)
#    Time: 650 us  Scope: CheckDetection_dpi_pkg.VerifyInterfaceT.reportVerifyCoverage File: ../scoreboard/CheckDetection_dpi_pkg.sv Line: 369
# ** Info: Overall coverage for CheckDetection_dpi_verify_calls: metric=100.00 (   COVERED)
#    Time: 650 us  Scope: CheckDetection_dpi_pkg.VerifyInterfaceT.reportVerifyCoverage File: ../scoreboard/CheckDetection_dpi_pkg.sv Line: 376
# 
# --- UVM Report Summary ---
# 
# ** Report counts by severity
# UVM_INFO :    5
# UVM_WARNING :    1
# UVM_ERROR :    0
# UVM_FATAL :    0
# ** Report counts by id
# [MULTTST]     1
# [Questa UVM]     2
# [RNTST]     1
# [TEST_DONE]     1
# [mw_PulseDetector_test_SCRPRM]     1
# ** Note: $finish    : /mathworks/hub/3rdparty/R2023a/8709182/share/Questasim/Lin/linux_x86_64/../verilog_src/uvm-1.1d/src/base/uvm_root.svh(430)
#    Time: 650 us  Iteration: 61  Instance: /mw_PulseDetector_top
# End time: 17:38:06 on Jun 14,2023, Elapsed time: 0:00:19
# Errors: 4, Warnings: 3

cd ../../..

違反の数は、生成されたランダム化されたエラーしきい値によって異なります。

派生構成オブジェクトを使用してエラーしきい値をランダム化する

派生スコアボード構成オブジェクトを作成することで、構成設定のより高度なランダム化を作成することもできます。この例では、テスト計画では、検出器のさまざまな動作環境を反映するさまざまな範囲にしきい値が収まることが必要です。

mw_PulseDetector_SCRPRM_param_overrides.svを参照してください。

この目標を達成するために、派生構成オブジェクトには次の追加の動作があります。

threshold_bucketとして宣言されたrandc メンバーを追加します。
threshold_bucketメンバーを使用して、しきい値の範囲を指定します。
シミュレーション中に検査するために、ランダム化された値を出力します。

新しいテストが作成され、UVM ファクトリに新しい構成オブジェクトを使用し、ビルドフェーズ中にその設定をランダム化するように指示します。