TNSVU User's Guide

Glossary
TNSVU User’s Guide—528143-003
Glossary-24
System Library (SL)
System Library (SL). See TNS code space.
system library. A logically distinct part of the HP NonStop™ operating system that consists
of user-callable library procedures and kernel procedures.
system process. (1) A privileged process that comes into existence at system-load time
and exists continuously for a given configuration for as long as the processor remains
operable. (2) An HP NonStop™ operating system process, such as the memory
manager, the monitor, and the input/output (I/O) control processes. The files containing
system processes are invoked by ALLPROCESSORS paragraph entries. (3) A part of
a single copy of the HP NonStop operating system with Open System Services (OSS)
interfaces. A system process does not have an OSS process ID.
TACL. See HP Tandem Advanced Command Language (TACL).
TAL. See HP Transaction Application Language (TAL).
TIM. See HP NonStop™ Technical Library (NTL).
TNS. Refers to fault-tolerant HP computers that support the HP NonStop™ operating
system and are based on microcoded complex instruction-set computing (CISC)
technology. TNS systems run the TNS instruction set. Contrast with TNS/R and TNS/E.
TNS accelerated mode. A TNS emulation environment on a TNS/R or TNS/E system in
which accelerated TNS object files are run. TNS instructions have been previously
translated into optimized sequences of MIPS or Intel® Itanium® instructions. TNS
accelerated mode runs much faster than TNS interpreted mode. Accelerated or
interpreted TNS object code cannot be mixed with or called by native mode object
code. See also TNS Object Code Accelerator (OCA). Contrast with TNS/R native
mode and TNS/E native mode.
TNS C compiler. The C compiler that generates TNS object files. Contrast with TNS/R
native C compiler and TNS/E native C compiler.
TNS code segment. One of up to 32 128-kilobyte areas of TNS object code within a TNS
code space. Each segment contains the TNS instructions for up to 510 complete
routines. Each TNS code segment contains its own procedure entry-point (PEP) table
and external entry-point (XEP) table. It can also contain read-only data.
TNS code segment identifier. A seven-bit value in which the most significant two bits
encode a code space (user code, user library, system code, or system library) and the
five remaining bits encode a code segment index in the range 0 through 31.
TNS code segment index. A value in the range 0 through 31 that indexes a code segment
within the current user code, user library, system code, or system library space. This
value can be encoded in five bits.
TNS code space. One of four addressable collections of TNS object code in a TNS
process. They are User Code (UC), User Library (UL), System Code (SC), and System