Inspect Manual

Glossary
Inspect Manual—429164-006
Glossary-9
OCA
OCA. (1) The command used to invoke the TNS Object Code Accelerator (OCA) on a
TNS/E system. (2) See TNS Object Code Accelerator (OCA).
OCA region loading. A task performed when necessary by the TNS emulation software for
TNS/E machines. This task involves mapping into memory the Intel Itanium
instructions and any tables needed at run time from the OCA-generated object file.
OCA region of an object file. The region of a Object Code Accelerator (OCA)-generated
object file, also called the Intel Itanium instruction region, that contains Itanium
instructions and tables necessary to execute the object file on a TNS/E system in TNS
accelerated mode. The Object Code Accelerator (OCA) creates this region. See also
OCA-accelerated object code. Contrast with Accelerator region of an object file.
OCA-accelerated object code. The Intel Itanium instructions that result from processing a
TNS object file with the Object Code Accelerator (OCA).
OCA-accelerated object file. A TNS object file that has been augmented by the TNS
Object Code Accelerator (OCA) with equivalent but faster Intel Itanium instructions. An
OCA-accelerated object file contains the original TNS object code, the OCA-
accelerated object code and related address map tables, and any Binder and symbol
information from the original TNS object file. An OCA-accelerated object file also can
be augmented by the Axcel accelerator with equivalent MIPS RISC instructions.
OCA-generated Itanium instructions. See Intel® Itanium® instructions.
open file. A file with a file descriptor.
open file description. A data structure within a NonStop node that contains information
about the access of a process or of a group of processes to a file. An open file
description records such attributes as the file offset, file status, and file access modes.
An open file description is associated with only one open file but can be associated
with one or more file descriptors.
Open System Services (OSS). An open system environment available for interactive or
programmatic use with the HP NonStop operating system. Processes that run in the
OSS environment usually use the OSS application program interface. Interactive users
of the OSS environment usually use the OSS shell for their command interpreter.
Synonymous with Open System Services (OSS) environment. Contrast with Guardian.
OSS. See Open System Services (OSS)
OSS process ID (PID). The unique identifier that represents a process during the lifetime of
the process and during the lifetime of the process group of that process. See also
“PID.”
OSS signal. A signal model defined in the POSIX.1 specification and available to TNS
processes and TNS/R native processes in the OSS environment. OSS signals can be
sent between processes.