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Debugging MPICH2 Applications Debugging MPICH2 Applications You should be using MPICH2 version 1.0.5p4 or higher. Earlier versions had problems that prevented TotalView from attaching to all the processes or viewing message queue data. Downloading and Configuring MPICH2 You can download the current MPICH2 version from: http://www-unix.mcs.anl.gov/mpi/mpich/ If you wish to use all of the TotalView MPI features, you must configure MPICH2. Do this by adding the following to the configure script that is within the downloaded information: --enable-debuginfo --enable-totalview The configure script looks for the following file: python2.x/config/Makefile It fails if the file is not there. The next steps are: 1 Run make 2 Run make install This places the binaries and libraries in the directory specified by the optional - -prefix option. 3 Set the PATH and LD_LIBRARY_PATH to point to the MPICH2 bin and lib directories. Starting the mpd Daemon You must start the mpd daemon using the mpdboot command. For example: mpdboot -n 4 -f hostfile where: –n 4 Indicates the number of hosts upon which you wish to run the daemon. In this example, the daemen runs on four hosts –f hostfile Is a list of the hosts upon which the application will run. In this example, a file named hostfile contains this list. You are now ready to start debugging your application. TotalView only supports jobs run using MPD. Using other daemons such as SMPD is not supported. 104 Chapter 6: Setting Up MPI Debugging Sessions
Starting MPI Issues Starting TotalView Debugging on an MPICH2 Job In many cases, you can bypass the procedure described in this section. For more information, see “Debugging MPI Programs” on page 98. TotalView lets you start an MPICH2 job in one of the following ways: mpiexec mpi-args –tv program –a program-args This command tells MPI to start TotalView. You will need to set the TOTALVIEW environment variable to where TotalView is located in your file system when you start a program using mpiexec. For example: setenv TOTALVIEW \ /opt/totalview/bin/totalview This method of starting TotalView does not let you restart your program without exiting TotalView and you will not be able to attach to a running MPI job. totalview python -a `which mpiexec` \ –tvsu mpiexec-args program program-args This command lets you restart your MPICH2 job. It also lets you attach to a running MPICH2 job by using the Attach to process options within the File > New Program dialog box. You need to be careful that you attach to the right instance of python as it is likely that a few instances are running. The one to which you want to attach has no attached children—child processes are indented with a line showing the connection to the parent. You may not see sources to your program at first. If you do see the program, you can set breakpoints. In either case, press the Go button. Your process will start and TotalView displays a dialog box when your program goes parallel that allows you to stop execution. (This is the default behavior. You can change it using the options within File >Preferences >Parallel page. You will also need to set the TOTALVIEW environment variable as indicated in the previous method. Starting MPI Issues In many cases, you can bypass the procedure described in this section. For more information, see “Debugging MPI Programs” on page 98. TotalView Users Guide: version 8.6 105
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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
Page 85 and 86: Starting TotalView If you type an e
Page 87 and 88: Starting TotalView Before Version 6
Page 89 and 90: Figure 53: Start a New Process Load
Page 91 and 92: Figure 55: Open a Core File Start a
Page 93 and 94: Figure 57: Thread > Continuation Si
Page 95 and 96: Figure 59: Setting Command-Line Opt
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Page 99 and 100: Handling Signals Thread > Continuat
Page 101 and 102: Setting Search Paths Make your chan
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Page 105 and 106: Figure 66: File > Preferences Dialo
Page 107 and 108: Setting Preferences Dynamic Librari
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Page 111 and 112: Setting Preferences Similarly, docu
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Page 121 and 122: Starting the TotalView Server Manua
Page 123 and 124: Disabling Autolaunch Setting Bulk S
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Page 129 and 130: c h a p t e r 6 Setting Up MPI Debu
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Page 133 and 134: Debugging MPICH Applications The MP
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Page 141 and 142: Displaying the Message Queue play i
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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 151 and 152: Debugging LAM/MPI Applications the
Page 153 and 154: Debugging SiCortex MPI Applications
Page 155 and 156: Debugging Sun MPI Applications mapp
Page 157 and 158: Figure 91: Group > Attach Subset Di
Page 159 and 160: Debugging Parallel Applications Tip
Page 161 and 162: Debugging Parallel Applications Tip
Page 163 and 164: c h a p t e r 7 Setting Up Parallel
Page 165 and 166: Debugging OpenMP Applications � T
Page 167 and 168: Figure 95: OpenMP Shared Variable T
Page 169 and 170: Figure 96: OpenMP THREADPRIVATE Com
Page 171 and 172: Figure 98: Cell Architecture PPE PP
Page 173 and 174: Figure 100: Root Window for a Cell
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Page 177 and 178: Debugging Cray XT Applications For
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Page 181 and 182: Debugging Global Arrays Application
Page 183 and 184: Debugging PVM (Parallel Virtual Mac
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Figure 106: PVM Tasks and Configura
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Figure 107: SHMEM Sample Session
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Figure 108: A Sliced UPC Array Figu
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Figure 111: Pointer to a Shared Var
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Part III: Using the GUI The two cha
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c h a p t e r Using TotalView Windo
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Figure 112: Root Window Figure 113:
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Figure 115: Sorted and Aggregated R
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Figure 117: Line Numbers with Stop
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Figure 119: Assembly Only (Symbolic
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Figure 122: Backward and Forward Bu
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Figure 124: File > Save Pane Dialog
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c h a p t e r 9 Visualizing Program
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Command Summary Visualizing Array D
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Figure 127: A Three- Dimensional Ar
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Figure 129: Graph and Surface Visua
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Figure 130: Visualizer Graph View W
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Figure 134: A Surface View of a Sin
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Visualizing Array Data Manipulating
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Visualizing Array Data quickly see
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Visualizing Array Data different vi
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Part IV: Using the CLI The chapters
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c h a p t e r Using the CLI 10 The
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Using the CLI Interface Starting th
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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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