HP Caliper User's Guide

Using the HP Caliper Advisor
One way to get started using HP Caliper quickly is to use the HP Caliper Advisor. See
“Using the HP Caliper Advisor” (p. 101).
Restrictions on Using HP Caliper
Some restrictions are:
• When HP Caliper detaches from a process, it can affect the I/O relationship between
the user and that process. An example is an application that reads stdin from the
user; e.g., caliper ecount top If HP Caliper is sent a SIGINT (or the --duration
option is given), it will detach from the 'top' process, which will break the I/O
between the user and 'top'. Text typed into the terminal window will no longer be
sent to the 'top' process, and the curses library used by 'top' will break the stty
settings in the terminal window.
• Shared library support does not include instrumented measurements ( cgprof,
and fcount measurements) of the dld.so and uld.so system libraries.
• It is not possible to debug an application while it is being measured by HP Caliper.
• These measurements measure and report only aggregated results of multithreaded
programs:
• ecount
• fcount
• fcover
• HP Caliper only measures native Integrity servers programs, not PA-RISC programs
running in emulation mode.
• HP Caliper might not be able to measure handwritten assembly code that performs
address arithmetic or does not follow the standard run-time conventions.
• HP Caliper cannot make measurements for dynamically generated code with these
measurements:
• cgprof
• fcount
• fcover
40 Getting Started with the HP Caliper Command-Line Interface