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Debugging UPC Programs Debugging UPC Programs TotalView lets you debug UPC programs that were compiled using the HP Compaq Alpha UPC 2.0 and the Intrepid (SGI gcc UPC) compilers. This section only discusses the UPC-specific features of TotalView. It is not an introduction to the UPC Language. For an introduction to the UPC language, go to http://www.gwu.edu/~upc. When debugging UPC code, TotalView requires help from a UPC assistant library that your compiler vendor provides. You need to include the location of this library in your LD_LIBRARY_PATH environment variable. TotalView Technologies also provides assistants that you can use. You can find these assistants at http://www.totalviewtech.com/Products/TotalView/developers/index.html. Topics in this section are: � “Invoking TotalView” on page 158 � “Viewing Shared Objects” on page 158 � “Displaying Pointer to Shared Variables” on page 160 Invoking TotalView The way in which you invoke TotalView on a UPC program is straight-forward. However, this procedure depends on the computer upon which the program is executing: � When running on an SGI system using the gcc UPC compiler, invoke TotalView on your UPC program in the same way as you would invoke it on most other programs; for example: totalview prog_upc -a prog_upc_args � When running on Linux and HP Compaq SC computers, debug UPC code in the same way that you would debug other kinds of parallel code; for example: totalview prun -a -n node_count prog_upc prog_upc_args Viewing Shared Objects TotalView displays UPC shared objects, and fetches data from the UPC thread with which it has an affinity. For example, TotalView always fetches shared scalar variables from thread 0. The upper-left screen in Figure 108 on page 159 displays elements of a large shared array. You can manipulate and examine shared arrays the same as any other array. For example, you can slice, filter, obtain statistical information, and so on. (For more information on displaying array data, see Chapter 15, “Examining Arrays,” on page 333.) The lower-right screen shows a slice of this array. 158 Chapter 7: Setting Up Parallel Debugging Sessions
Figure 108: A Sliced UPC Array Figure 109: UPC Variable Window Showing Nodes Debugging UPC Programs In this figure, TotalView displays the value of a pointer-to-shared variable whose target is the array in the Shared Address area. As usual, the address in the process appears in the top left of the display. Since the array is shared, it has an additional property: the element’s affinity. You can display this information if you right-click your mouse on the header and tell TotalView to display Nodes.(See Figure 109.) You can also use the Tools > Visualize Distribution command to visualize this array. For more information on visualization, see “Visualizing Array Data” on page 181. TotalView Reference Guide: version 8.7 159
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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
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Debugging MPICH Applications The MP
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Debugging MPICH Applications 4 Afte
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Starting MPI Issues Starting TotalV
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Page 141 and 142: Displaying the Message Queue play i
Page 143 and 144: Figure 90: Message Queue Window Sho
Page 145 and 146: Debugging HP MPI Applications This
Page 147 and 148: Debugging IBM MPI Parallel Environm
Page 149 and 150: Debugging IBM MPI Parallel Environm
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
Page 179 and 180: Debugging SiCortex Applications Her
Page 181 and 182: Debugging Global Arrays Application
Page 183 and 184: Debugging PVM (Parallel Virtual Mac
Page 185 and 186: Debugging PVM (Parallel Virtual Mac
Page 187 and 188: Figure 106: PVM Tasks and Configura
Page 189: Figure 107: SHMEM Sample Session
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Page 195 and 196: Part III: Using the GUI The two cha
Page 197 and 198: c h a p t e r Using TotalView Windo
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Page 201 and 202: Figure 115: Sorted and Aggregated R
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Page 205 and 206: Figure 119: Assembly Only (Symbolic
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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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Page 223 and 224: Visualizing Array Data Manipulating
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Page 229 and 230: Part IV: Using the CLI The chapters
Page 231 and 232: c h a p t e r Using the CLI 10 The
Page 233 and 234: Using the CLI Interface Starting th
Page 235 and 236: # source make_actions.tcl # dload f
Page 237 and 238: About CLI Output About CLI Output A
Page 239 and 240: 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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