TotalView Users Guide - CI Wiki

PTHREAD ID: This is the ID assigned by the Posix pthreads package. If this
differs from the system TID, it is a pointer value that points to the pthread
ID.
PVM LIBRARY: Parallel Virtual Machine library. A message-passing library for
creating distributed programs that was developed by the Oak Ridge
National Laboratory and the University of Tennessee.
QUEUE: A data structure whose data is accessed in the order in which it was
entered. This is like a line at a tollbooth where the first in is the first out.
RACE CONDITION: A problem that occurs when threads try to simultaneously
access a resource. The result can be a deadlock, data corruption,
or a program fault.
REMOTE DEBUGGING: The action of debugging a program that is running on
a different machine than TotalView. The machine on which the program is
running can be located many miles away from the machine on which
TotalView is running.
RESUME COMMANDS: Commands that cause execution to restart from a
stopped state: dstep, dgo, dcont, dwait.
RHS EXPRESSION: This is a synonym for rvalue.
RVALUE: An expression suitable for inclusion on the right-hand side of an
assignment statement in the corresponding source language. In other
words, an expression that evaluates to a value or collection of values.
SATISFACTION SET: The set of processes and threads that must be held
before a barrier can be satisfied.
SATISFIED: A condition that indicates that all processes or threads in a
group have reached a barrier. Prior to this event, all executing processes
and threads are either running because they have not yet hit the barrier, or
are being held at the barrier because not all of the processes or threads
have reached it. After the barrier is satisfied, the held processes or threads
are released, which means they can be run. Prior to this event, they could
not run.
SCOPE: The region in your program in which a variable or a function exists
or is defined. This region begins with its declaration and extends to the end
of the current block.
SEARCH PATH: A list that contains places that software looks to locate files
contained within the file system. In TotalView, the search path contains
locations containing your program’s source code.
SERIAL EXECUTION: Execution of a program sequentially, one statement at a
time.
SERIAL LINE DEBUGGING: A form of remote debugging where TotalView and
the tvdsvr communicate over a serial line.
SERVICE THREAD: A thread whose purpose is to service or manage other
threads. For example, queue managers and print spoolers are service
406 Glossary