HP UX Caliper Software Function Statement Cache line, Information in itlb Measurement Reports

•Function

•Statement

•Cache line

Table 28 Information in itlb Measurement Reports

Column	Description
% Total <metric>	Percent of the total for <metric> attributable to a given program object. The <metric> is the same
	as the <metric> HP Caliper uses for sorting, except when the sort metric is address, in which
	case sampled misses is used.
Cumulat % of Total	Running sum of the percent of total for <metric> accounted for by the given program object and
	those listed above it.
Sampled ITLB	Total number of sampled instruction TLB misses attributed to the given program object.
Misses
ITLB L2 Fills	Number of sampled instruction TLB misses that hit the L2 instruction TLB for the given program
	object. L2 fills are not reported for, and do not apply to, Itanium systems.
ITLB HPW Fills	Number of sampled instruction TLB misses that were handled by the HPW for the given program
	object.
ITLB Soft Fills	Number of sampled instruction TLB misses that were handled by software for the given program
	object.
% ITLB L2 Fill	Percent of sampled instruction TLB misses that hit the L2 instruction TLB for the given program object.
	L2 fills are not reported for, and do not apply to, Itanium systems.
% ITLB HPW Fill	Percent of sampled instruction TLB misses that were handled by the HPW for the given program
	object.
% ITLB Soft Fill	Percent of sampled instruction TLB misses that were handled by software for the given program
	object.
Kernel Thread	Kernel Thread ID suffixed with the the name of the routine that the thread will execute once it is
Identification	created.
Number.
Load Module	Shared library or the main executable.
Function	Routine from your application.
File	Source file associated with a function.
Line	The column contains one of these:
Slot	• A source-code line number for rows showing statements
Col,Offset
	• An instruction slot number for rows showing instructions not on a bundle boundary
	• A source-code column number followed by an offset from the beginning address of a function
	for rows showing instructions on a bundle boundary
	Column and line numbers are preceded by “~” when they are approximate due to optimization.
>Statement	The column contains either a source statement, preceded by “>”, or a disassembled instruction.
Instruction	Statements that are out of order due to optimization are preceded by “*>”.

Function Details

A cache line is the smallest unit of data that is transferred at one time between main memory and the instruction cache. On Itanium 2 systems, cache lines are 64 bytes (12 instructions). Cache lines are the finest level of granularity available in itlb measurement reports

These reports show data associated with a cache line on the same row as the first instruction of the cache line. Each set of instructions that make up a cache line are preceded and followed by a row of dashes (“- - - -”). The cache lines shown might not be contiguous.

210 Descriptions of Measurement Reports