•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