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Debugging PVM (Parallel Virtual Machine) and DPVM Applications Setting Up ORNL PVM Debugging To enable PVM, create a symbolic link from the PVM bin directory (which is usually $HOME/pvm3/bin/$PVM_ARCH/tvdsvr) to the TotalView Server (tvdsvr). With this link in place, TotalView invokes pvm_spawn() to spawn the tvdsvr tasks. For example, if tvdsvr is installed in the /opt/totalview/bin directory, enter the following command: ln -s /opt/totalview/bin/tvdsvr \ $HOME/pvm3/bin/$PVM_ARCH/tvdsvr If the symbolic link doesn’t exist, TotalView can’t spawn tvdsvr. If TotalView can’t spawn tvdsvr, it displays the following error: Error spawning TotalView Debugger Server: No such file Starting an ORNL PVM Session Start the ORNL PVM daemon process before you start TotalView. See the ORNL PVM documentation for information about the PVM daemon process and console program. The procedure for starting an ORNL PVM application is as follows: 1 Use the pvm command to start a PVM console session—this command starts the PVM daemon. If PVM isn’t running when you start TotalView (with PVM support enabled), TotalView exits with the following message: Fatal error: Error enrolling as PVM task: pvm error 2 If your application uses groups, start the pvmgs process before starting TotalView. PVM groups are unrelated to TotalView process groups. For information about TotalView process groups, see “Examining Groups” on page 235. 3 You can use the –pvm command-line option to the totalview command. As an alternative, you can set the TV::pvm variable in a startup file. The command-line options override the CLI variable. For more information, see “TotalView Command Syntax” in the TotalView Reference Guide. 4 Set the TotalView directory search path to include the PVM directories. This directory list must include those needed to find both executable and source files. The directories you use can vary, but should always contain the current directory and your home directory. You can set the directory search path using either the EXECUTABLE_PATH variable or the File > Search Path command. See “Setting Search Paths” on page 71 for more information. For example, to debug the PVM examples, you can place the following directories in your search path: . $HOME $PVM_ROOT/xep $PVM_ROOT/xep/$PVM_ARCH $PVM_ROOT/src 152 Chapter 7: Setting Up Parallel Debugging Sessions
Debugging PVM (Parallel Virtual Machine) and DPVM Applications $PVM_ROOT/src/$PVM_ARCH $PVM_ROOT/bin/$PVM_ARCH $PVM_ROOT/examples $PVM_ROOT/examples/$PVM_ARCH $PVM_ROOT/gexamples $PVM_ROOT/gexamples/$PVM_ARCH 5 Verify that the action taken by TotalView for the SIGTERM signal is appropriate. (You can examine the current action by using the Process Window File > Signals command. See “Handling Signals” on page 69 for more information.) PVM uses the SIGTERM signal to terminate processes. Because TotalView stops a process when the process receives a SIGTERM, the process is not terminated. If you want the PVM process to terminate, set the action for the SIGTERM signal to Resend. TotalView will automatically acquire your application’s PVM processes. For more information, see “Automatically Acquiring PVM/DPVM Processes” on page 154. Starting a DPVM Session Starting a DPVM debugging session is similar to starting any other TotalView debugging session. The only additional requirement is that you must start the DPVM daemon before you start TotalView. See the DPVM documentation for information about the DPVM daemon and its console program. The procedure for starting an DPVM application is as follows 1 Use the dpvm command to start a DPVM console session; starting the session also starts the DPVM daemon. If DPVM isn’t running when you start TotalView (with DPVM support enabled), TotalView displays the following error message before it exits: Fatal error: Error enrolling as DPVM task: dpvm error 2 Enable DPVM support either by using the TV::dpvm CLI variable or by using the –dpvm command-line option to the totalview command. The command-line options override the TV:dpvm command variable. For more information on the totalview command, see “TotalView Command Syntax” in the TotalView Reference Guide. 3 Verify that the default action taken by TotalView for the SIGTERM signal is appropriate. (You can examine the default actions with the Process Window File > Signals command in TotalView. See “Handling Signals” on page 69 for more information.) DPVM uses the SIGTERM signal to terminate processes. Because TotalView stops a process when the process receives a SIGTERM, the process is not terminated. If you want the DPVM process to terminate, set the action for the SIGTERM signal to Resend. If you enable PVM support using the TV::pvm variable and you need to use DPVM, you must use both –no_pvm and –dpvm command-line options when you start TotalView. Similarly, when enabling DPVM support us the TV::dpvm variable, you must use the –no_dpvm and –pvm command-line options. TotalView Reference Guide: version 8.7 153
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TotalView Users Guide version 8.7
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Book Overview part I - Introduction
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Contents About This Book TotalView
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Setting Preferences, Options, and X
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Installation Notes ................
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Starting Processes and Threads ....
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Displaying Allocated Arrays........
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Using Built-In Statements .........
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Figures Chapter 1: Getting Started
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Figure 76. File > Preferences: Bulk
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Chapter 13: Using Groups, Processes
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About This Book This book describes
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How to Use This Book The informatio
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Conventions and what you should cli
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Contacting Us Contacting Us Please
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Part I: Introduction This part of t
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Getting Started Figure 1: The Proce
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Getting Started Figure 3: Setting C
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Getting Started Figure 5: Diving on
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Debugging Multi-process and Multi-t
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Using Groups and Barriers Figure 10
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Introducing the CLI Introducing the
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A Couple of Processes Figure 14: A
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Threads Figure 18: Threads Threads
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Types of Threads Figure 20: Four Pr
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Organizing Chaos Figure 23: User, S
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Organizing Chaos Figure 25: Five Pr
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Creating Groups Figure 27: Step 1:
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Creating Groups Figure 30: Step 5:
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Simplifying What You’re Debugging
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Simplifying What You’re Debugging
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c h a p t e r Getting Started with
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Figure 36: Remote Display Client Se
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Figure 38: Asking for Password Usin
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Using Remote Display You can, of co
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Figure 42: Local Data in a Stack Fr
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Figure 43: Access By Options Remote
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Figure 44: Remote Host Information
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Figure 47: Saving a Profile Figure
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c h a p t e r Setting Up a Debuggin
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Starting TotalView customer_compili
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Starting TotalView If you type an e
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Starting TotalView Before Version 6
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Figure 53: Start a New Process Load
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Figure 55: Open a Core File Start a
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Figure 57: Thread > Continuation Si
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Figure 59: Setting Command-Line Opt
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Figure 61: Root Window Showing Proc
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Handling Signals Thread > Continuat
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Setting Search Paths Make your chan
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Figure 65: Select Directory Dialog
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Figure 66: File > Preferences Dialo
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Setting Preferences Dynamic Librari
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Setting Preferences Pointer Dive Th
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Setting Preferences Similarly, docu
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c h a p t e r 5 Setting Up Remote D
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Figure 75: File > Preferences: Laun
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Figure 76: File > Preferences: Bulk
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Figure 77: Manual Launching of Debu
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Starting the TotalView Server Manua
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Disabling Autolaunch Setting Bulk S
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Figure 78: Launching tvdsvr Disabli
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Figure 80: Debugging Session Over a
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c h a p t e r 6 Setting Up MPI Debu
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Figure 82: File > New Program Dialo
Page 133 and 134: Debugging MPICH Applications The MP
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Page 137 and 138: Starting MPI Issues Starting TotalV
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Page 145 and 146: Debugging HP MPI Applications This
Page 147 and 148: Debugging IBM MPI Parallel Environm
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Page 155 and 156: Debugging Sun MPI Applications mapp
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Page 159 and 160: Debugging Parallel Applications Tip
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Page 163 and 164: c h a p t e r 7 Setting Up Parallel
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Page 181 and 182: Debugging Global Arrays Application
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Page 211 and 212: c h a p t e r 9 Visualizing Program
Page 213 and 214: Command Summary Visualizing Array D
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# source make_actions.tcl # dload f
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About CLI Output About CLI Output A
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Using Namespaces Using Namespaces C
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How Parallelism Affects Behavior Ho
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Controlling Program Execution Typic
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c h a p t e r 11 Seeing the CLI at
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Initializing an Array Slice Initial
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Writing an Array Variable to a File
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} } Automatically Setting Breakpoin
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Part V: Debugging The chapters in t
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c h a p t e r Debugging Programs 12
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Figure 141: View > Lookup Variable
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Figure 146: View > Lookup Function
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Manipulating Processes and Threads
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Figure 150: The Threads Tab Updatin
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Why breakpoints don’t work (part
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Examining Groups Manipulating Proce
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Manipulating Processes and Threads
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Figure 155: Stepping Illustrated Us
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Executing to a Selected Line If the
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Killing (Deleting) Programs 3 Conti
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Figure 158: Tools > Debugger Loaded
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Figure 160: File > Preferences: Dyn
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Setting the Program Counter some co
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c h a p t e r Using Groups, Process
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Stepping (Part I) � Set breakpoin
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Understanding Thread Width Stepping
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Understanding Process/Thread Sets S
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Specifying Arenas Setting Process a
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Figure 163: Width Specifiers Settin
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Setting Group Focus � Lockstep Gr
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Specifier Specifies Setting Group F
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‘All’ Does Not Always Mean ‘A
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The following are some additional e
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Setting Group Focus Although the lo
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Naming Lists with Inconsistent Widt
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Using P/T Set Operators Using P/T S
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Figure 164: Group > Custom Groups D
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c h a p t e r Examining and Changin
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Figure 167: List and Vector Transfo
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Figure 169: A Tooltip Displaying Va
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Displaying Variables since the vari
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Figure 173: Variable Window Showing
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Displaying Variables Scoping Issues
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Figure 177: Program Browser and Var
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Figure 179: Diving on Local Variabl
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Figure 181: View > Examine Format >
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Figure 184: Variable Window with Ma
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Figure 185: Undive/Redive Buttons F
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Figure 188: Displaying C Structures
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Figure 190: The Tools > Expression
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Figure 193: Expression List Window
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Figure 197: Using Functions in the
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Viewing a List of Variables (or sel
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Figure 199: Using an Expression to
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Figure 200: Three Casts Changing a
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Changing a Variable’s Data Type W
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Changing a Variable’s Data Type T
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Figure 202: Displaying wchar_t Data
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Changing the Address of Variables D
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Figure 204: Displaying C++ Classes
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Figure 205: Diving on a Common Bloc
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Figure 207: Fortran 90 User- Define
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Displaying Thread Objects that has
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Figure 210: Variable Window: Showin
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c h a p t e r Examining Arrays 15 T
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Examining and Analyzing Arrays This
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Figure 213: An Array Slice and an A
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Figure 214: Array Data Filtering by
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Figure 216: Array Data Filtering by
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Figure 218: Array Statistics Window
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Figure 219: Viewing Across Threads
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Visualizing Array Data Visualizing
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c h a p t e r 16 Setting Action Poi
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Figure 222: Action Point Tab Settin
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Figure 224: Setting Breakpoints on
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Figure 227: Ambiguous Function Dial
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Figure 229: Action Point > At Locat
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Figure 232: PC Arrow Over a Stop Ic
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Setting Breakpoints and Barriers at
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Setting Breakpoints and Barriers Ab
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Setting Breakpoints and Barriers Wh
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Defining Eval Points and Conditiona
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Defining Eval Points and Conditiona
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Figure 236: Stopped Execution of Co
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Using Watchpoints Platform Assemble
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Using Watchpoints Computer Constrai
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Watching Memory Using Watchpoints A
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The following is an expression that
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c h a p t e r Evaluating Expression
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Why is There an Expression System?
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Figure 240: Expression List Window:
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Using Programming Language Elements
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Using the Evaluate Window Using the
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Figure 244: Evaluating Information
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Using the Evaluate Window Pseudo Op
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Using Built-in Variables and Statem
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Glossary ACTION POINT: A debugger f
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off the function reference to an ev
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DOPE VECTOR: This is a run time des
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INITIALIZATION FILE: An optional fi
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PARCEL: The number of bytes require
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threads. There are two kinds of ser
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SYMBOL NAME: The name associated wi
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Index Symbols # scope separator cha
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array structure viewing limitations
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context 138 description 140 empty c
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Tools > Watchpoint 10, 378 totalvie
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into a stack frame 174 into a struc
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-file command-line option to Visual
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see alsoshared libraries limitation
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expressions 275 set of arenas 259 s
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PVM groups, unrelated to process gr
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stride elements 334 UPC 158 upper b
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threads model 18 threads tab 230 th
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View > Compilation Scope commands 2
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