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Manipulating Processes and Threads Figure 148: The Processes Tab Figure 149: The Processes Tab: Showing Group Selection The color that TotalView uses to display a process indicates the process’s state, as follows: Color Meaning Blue Stopped; usually due to another process or thread hitting a breakpoint. Orange At breakpoint. Green All threads in the process are running or can run. Red The Error state. Signals such as SIGSEGV, SIGBUS, and SIGFPE can indicate an error in your program. Gray The process has not begun running. The following figure shows a tab with processes in three different states (the differences are hard to see in the printed manual): If you select a group by using the Process Window’s group selector pulldown (see “Using the Toolbar to Select a Target” on page 228 for information), TotalView dims the blocks for processes not in the group. (See Figure 149.) CLI: dptsets If you click on a block, the context within the Process Window changes to the first thread in that process. CLI: dfocus Clicking on the P+ and P– buttons in the tab bar. changes the process being displayed within the Process Window. Using the Threads Tab The Threads Tab displays information about the state of your threads. Clicking on a thread tells TotalView to shift the focus within the Process Window to that thread. (See Figure 150 on page 231.) Clicking on the T+ and T– buttons in the tab bar changes the thread being displayed within the Process Window. 230 Chapter 12: Debugging Programs
Figure 150: The Threads Tab Updating Process Information Manipulating Processes and Threads Normally, TotalView only updates information when the thread being executed stops executing. You can force TotalView to update a window by using the Window > Update command. You need to use this command if you want to see what a variable’s value is while your program is executing. When you use this command, TotalView momentarily stops execution so that it can obtain the information that it needs. It then restarts the thread. Holding and Releasing Processes and Threads Many times when you are running a multi-process or multi-threaded program, you want to synchronize execution to the same place. You can do this manually using a hold command, or automatically by setting a barrier point. When a process or a thread is held, any command that it receives that tells it to execute are ignored. For example, assume that you place a hold on a process in a control group that contains three processes. After you select Group > Go, two of the three processes resume executing. The held process ignores the Go command. At a later time, you will want to run what is being held. Do this using a Release command. When you release a process or a thread, you are telling it that it can run. But you still need to tell it to execute, which means that it is waiting to receive an execution command, such as Go, Out, or Step. Manually holding and releasing processes and threads is useful in the following instances: � When you need to run a subset of the processes and threads. You can manually hold all but the ones you want to run. � When a process or thread is held at a barrier point and you want to run it without first running all the other processes or threads in the group to that barrier. In this case, you release the process or the thread manually, and then run it. TotalView can also hold a process or thread if it stops at a barrier breakpoint. You can manually release a process or thread being held at a barrier breakpoint. See “Setting Barrier Points” on page 362 for more information on manually holding and releasing barrier breakpoint. When TotalView is holding a process, the Root and Process Windows display a held indicator, which is the uppercase letter H. When TotalView is holding a thread, it displays a lowercase h. TotalView Users Guide: version 8.7 231
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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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Figure 86: Tools > Message Queue Gr
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Displaying the Message Queue play i
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Figure 90: Message Queue Window Sho
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Debugging HP MPI Applications This
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Debugging IBM MPI Parallel Environm
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Debugging IBM MPI Parallel Environm
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Debugging LAM/MPI Applications the
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Debugging SiCortex MPI Applications
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Debugging Sun MPI Applications mapp
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Figure 91: Group > Attach Subset Di
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Debugging Parallel Applications Tip
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Debugging Parallel Applications Tip
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c h a p t e r 7 Setting Up Parallel
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Debugging OpenMP Applications � T
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Figure 95: OpenMP Shared Variable T
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Figure 96: OpenMP THREADPRIVATE Com
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Figure 98: Cell Architecture PPE PP
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Figure 100: Root Window for a Cell
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Figure 103: Register Union Debuggin
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Debugging Cray XT Applications For
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Debugging SiCortex Applications Her
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Debugging Global Arrays Application
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Debugging PVM (Parallel Virtual Mac
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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
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 229 and 230: Part IV: Using the CLI The chapters
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Page 233 and 234: Using the CLI Interface Starting th
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Page 237 and 238: About CLI Output About CLI Output A
Page 239 and 240: Using Namespaces Using Namespaces C
Page 241 and 242: How Parallelism Affects Behavior Ho
Page 243 and 244: Controlling Program Execution Typic
Page 245 and 246: c h a p t e r 11 Seeing the CLI at
Page 247 and 248: Initializing an Array Slice Initial
Page 249 and 250: Writing an Array Variable to a File
Page 251 and 252: } } Automatically Setting Breakpoin
Page 253 and 254: Part V: Debugging The chapters in t
Page 255 and 256: c h a p t e r Debugging Programs 12
Page 257 and 258: Figure 141: View > Lookup Variable
Page 259 and 260: Figure 146: View > Lookup Function
Page 261: Manipulating Processes and Threads
Page 265 and 266: Why breakpoints don’t work (part
Page 267 and 268: Examining Groups Manipulating Proce
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Page 271 and 272: Figure 155: Stepping Illustrated Us
Page 273 and 274: Executing to a Selected Line If the
Page 275 and 276: Killing (Deleting) Programs 3 Conti
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Page 283 and 284: c h a p t e r Using Groups, Process
Page 285 and 286: Stepping (Part I) � Set breakpoin
Page 287 and 288: Understanding Thread Width Stepping
Page 289 and 290: Understanding Process/Thread Sets S
Page 291 and 292: Specifying Arenas Setting Process a
Page 293 and 294: Figure 163: Width Specifiers Settin
Page 295 and 296: Setting Group Focus � Lockstep Gr
Page 297 and 298: Specifier Specifies Setting Group F
Page 299 and 300: ‘All’ Does Not Always Mean ‘A
Page 301 and 302: The following are some additional e
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Page 305 and 306: Naming Lists with Inconsistent Widt
Page 307 and 308: Using P/T Set Operators Using P/T S
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Page 311 and 312: 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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