HP Caliper User's Guide

fcount
measurement
A measurement, provided by the fcount measurement configuration file, that measures and
reports function counts in a program.
fcover
measurement
A measurement, provided by the fcover measurement configuration file, that measures and
reports functions used by a program.
fprof
measurement
A measurement, provided by the fprof measurement configuration file, that measures and
reports sampled instruction addresses.
front side bus
(FSB)
A bus that connects the central processing unit with main memory. Also known as processor bus,
memory bus, or system bus.
func_count
measurement
The non-preferred name for the fcount measurement. This name was used in releases prior to
Release 3.9.
func_cover
measurement
The non-preferred name for the fcover measurement. This name was used in releases prior to
Release 3.9.
functional
unit
A subsystem of a central processing unit.
global
measurement
A measurement that gives you total run metrics of your program. See “Global Measurement”
(p. 35).
gprof fallacy
The possibly misleading results that are produced by gprof-like reports regarding the amount
of time spent in a function. See “gprof Fallacy and Possibly Misleading Results” (p. 170).
hardware
page walker
(HPW)
In the Integrity servers processor family, the part of the processor that performs page lookups
from the virtual hash page table (VHPT) and seeks opportunities to insert translations into the
translation lookaside buffers (TLBs). TLB misses are handled by the HPW first. If the HPW fails
to find the required mapping information, the operating system than handles the TLB misses.
hot spot An instruction or set of instructions that has a higher execution count than most other instructions
in a program.
HP Caliper
Advisor
A rules-based expert system that gives guidance about improving the performance of an
application. See “Using the HP Caliper Advisor” (p. 101).
HP Caliper
option
A parameter in the HP Caliper command line used to customize the performance analysis. See
“HP Caliper Options” (p. 63).
HyperThreading
A feature of the dual-core Itanium 2 and Itanium 9300 quad-core processor that provides the
ability for a processor to create an additional logical processor that might allow additional
efficiencies of processing. A dual-core Itanium 2 processor with HyperThreading active provides
four logical processors, two on each core. An Itanium 9300 quad-core processor with
HyperThreading active provides eight logical processors. This allows the operating system to
schedule two threads or processes simultaneously. HyperThreading is formally called
Hyper-Threading Technology.
icache
measurement
A measurement, provided by the icache measurement configuration file, that measures and
reports instruction cache misses.
icache_miss
measurement
The non-preferred name for the icache measurement. This name was used in releases prior to
Release 3.9.
index value In the HP Caliper Advisor, a number representing the approximate importance of a particular
piece of advice. See “Using the HP Caliper Advisor” (p. 101).
instruction
bundle
In the Integrity servers processor family, a group of three instructions packed into 16 bytes. Also
known as bundle.
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