HP Caliper User's Guide

Branch Targets in Disassembly Listings
By default, the symbols shown for branch targets in disassembly are limited to 30
characters. You can change the limit by setting the following variable in the
measurement configuration file or the .caliperinit file:
disasm_target_name_limit = limit
Source Position Correlation
In addition to printing address and function names, HP Caliper prints source position
information when it is available and appropriate. This capability depends on extra
information generated by the compiler and is not always available. For example, if the
executable was stripped, this information cannot be shown.
If a program was compiled at a high optimization level, the source position is shown
with a ~ sign.
NOTE: On Linux, correlating sample data to source files created with GNU compilers
requires that you use the -g compiler option to produce debug information. For
example: gcc —g —O foo.c
Source Line Data
Performance data shown for source lines is, by default, enclosed in parentheses to help
differentiate it from bundle-level and instruction-level data. To have reports show
source line data without parentheses, set the following variable in the measurement
configuration file or the .caliperinit file:
use_parens_for_statement_data = False
Alternatively, you can turn off reporting of source line data altogether by setting the
following variable in the measurement configuration file or the .caliperinit file:
suppress_statement_data = True
Data attributed to a source line is data-aggregated across all bundles whose first
instruction is associated with the source line. This occurs even though the instruction
bundle might cross source line boundaries. Therefore, data attributed to source
statements will not always be completely accurate.
Column numbers emitted by the C and C++ and Fortran compilers and shown in reports
are not generally accurate, except for legacy HP C. However, they correctly reflect
relative positions in the source line. For example, column 4 represents a location in the
source line that occurs before column 5, though neither column 4 nor column 5
necessarily refers to the specific columns in the source line.
Address Types Shown
The following list describes the address types reported by HP Caliper:
144 Controlling the Content of Reports