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Glossary
Files that contain processed event logs have the .wv extension. See also
processed event log.
ready state
A process is in the ready state if it is not waiting for any resource other than
the processor; that is, it is placed on the run queue, and has not yet executed.
See also process state, process state transition.
real-time system
This is a general term referring to the “system” formed by the IRIX operating
system, your real-time application, and the hardware. This system must
respond to external events within prescribed time limits.
resource
A system object for which a process may contend with other processes.
Examples of resources are memory pool data structures, message queues,
and semaphores. If the resource is not available, a process contending for
that resource makes a transition to the pended state. See also process state
transition.
running state
See executing state.
scheduling
See preemptive priority scheduling.
semaphore
A semaphore is an IRIX system object that provides mutual exclusion of
shared resources and interprocess synchronization.
signal
IRIX supports UNIX BSD-style signals as well as POSIX-compatible signals
for asynchronous transfer of control within a process, based on hardware or
software exceptions.
The IRIX software signaling facility provides a set of 31 distinct signals. A
process can specify a signal handler routine to take appropriate action when
the associated signal is received. When signal handling is complete, normal
process execution resumes, unless the signal corresponds to an exception.
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