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首页Prime Time Fundamentals User Guide 2010.06
PrimeTime 是针对复杂、百万门芯片进行全芯片、门级静态时序分析的工具。PrimeTime 可以集成于逻辑综合 和物理综合的流程,让设计者分析并解决复杂的时序问题,并提高时序收敛的速度。PrimeTime 是众多半导体厂商 认可的、业界标准的静态时序分析工具。
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PrimeTime
®
Fundamentals
User Guide
Version D-2010.06, June 2010
PrimeTime Fundamentals User Guide, version D-2010.06 ii
Copyright Notice and Proprietary Information
Copyright © 2010 Synopsys, Inc. All rights reserved. This software and documentation contain confidential and proprietary
information that is the property of Synopsys, Inc. The software and documentation are furnished under a license agreement and
may be used or copied only in accordance with the terms of the license agreement. No part of the software and documentation may
be reproduced, transmitted, or translated, in any form or by any means, electronic, mechanical, manual, optical, or otherwise, without
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iii
Contents
What’s New in This Release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii
About This User Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii
Customer Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xx
1. Overview
PrimeTime Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Types of Checking Performed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Analysis Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Timing Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Command Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Design Compiler Compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
PrimeTime Add-On Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Static Timing Analysis Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Timing Paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Delay Calculation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Cell Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Net Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Constraint Checking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Setup and Hold Checking for Flip-Flops . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
Setup and Hold Checking for Latches . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
Timing Exceptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
Learning to Use PrimeTime . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
Contents iv
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PrimeTime Fundamentals User Guide Version D-2010.06
2. Starting and Using PrimeTime
Starting PrimeTime. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Starting a PrimeTime Session . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Ending a PrimeTime Session . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Licensing Requirements for Single-Core Analysis. . . . . . . . . . . . . . . . . . . . . . . 2-4
Enabling License Queuing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Startup Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Command Log File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Using pt_shell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Entering Commands Interactively . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Using Command-Line Editing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Choosing an Editor Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Using Command-Line Editing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Changing the pt_shell Prompts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Command Scripts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Running Scripts in Batch Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Command Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Tcl Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
PrimeTime Documentation and Online Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Using the help Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Using the man Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Man Pages for Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Man Pages for Variables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Man Pages for Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
PrimeTime Manuals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
SolvNet Articles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Analysis Flow in PrimeTime . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
Reading the Design Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
Parallel Parasitic Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Constraining the Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23
Specifying Clocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24
Specifying Input Timing Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25
Specifying Output Timing Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25
Specifying the Environment and Analysis Conditions . . . . . . . . . . . . . . . . . . . . 2-25
Minimum/Maximum Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
Chapter 2: Contents
2-v
Contents v
PrimeTime Fundamentals User Guide Version D-2010.06
Case Analysis and Mode Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
Driving Cells and Port Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
Timing Exceptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
Wire Load Models and Back-Annotated Delay . . . . . . . . . . . . . . . . . . . . . . 2-28
Checking the Design and Analysis Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28
Performing a Full Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-29
report_timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30
report_constraint. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31
report_bottleneck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33
report_global_slack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-34
report_analysis_coverage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-35
report_delay_calculation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-36
Timing Analysis Updates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37
Fixing Timing Violations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37
Saving and Restoring Single-Core Sessions. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37
3. Distributed and Threaded Multicore Analysis
Overview of Multicore Analysis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Threaded Multicore Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Executing Commands in Parallel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Distributed Multicore Analysis Flow in PrimeTime . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Overview of Distributed Multicore Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Using Distributed Multicore Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Setting the Working Directory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Setting Up Host Options for Compute Resources . . . . . . . . . . . . . . . . . . . 3-8
Requesting Compute Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Parasitics Handling in PrimeTime and PrimeTime SI . . . . . . . . . . . . . . . . . . . . 3-9
Timing Update Using the Distributed Multicore Analysis Flow. . . . . . . . . . . . . . 3-10
Distributed Multicore Analysis Reporting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Two Distributed Multicore Analysis Syntax Examples . . . . . . . . . . . . . . . . . . . . 3-11
Saving and Restoring Your Distributed Multicore Analysis Session . . . . . . . . . 3-12
Recommendations for Using Distributed Multicore Analysis . . . . . . . . . . . . . . . 3-12
Distributed Multicore Analysis User Messages . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Licensing Requirements for Distributed Multicore Analysis . . . . . . . . . . . . . . . . 3-14
4. Graphical User Interface
Analysis Flow With the GUI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
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