gp-collect-app - Collect performance data for the target
application
gprofng collect app [option(s)] target
[target-option(s)]
Collect performance data on the target program. In addition to
Program Counter (PC) sampling, hardware event counters and various tracing
options are supported.
For example, this command collects performance data for an
executable called a.out and stores the data collected in an
experiment directory with the name example.er.
$ gprofng collect app -o example.er ./a.out
- --version
- Print the version number and exit.
- --help
- Print usage information and exit.
- -v, --verbose
- By default, verbose mode is disabled. This option enables it.
- -p {off | on | lo[w] | hi[gh]
| <value>}
- Disable (off) or enable (on) clock profiling using a default
sampling granularity, or enable clock profiling implicitly by setting the
sampling granularity (lo[w], hi[gh], or a specific value in
ms). By default, clock profiling is enabled (-p on).
- -h
<ctr_def>[,<ctr_def>]
- Enable hardware event counter profiling and select one or more counter(s).
To see the supported counters on this system, use the -h option
without other arguments.
- -o
<exp_name>
- Specify the name for the experiment directory. The name has to end with
.er and may contain an absolute path (e.g.
/tmp/experiment.er). An existing experiment with the same name will
not be overwritten.
- -O
<exp_name>
- This is the same as the -o option, but unlike this option, silently
overwrites an existing experiment directory with the same name.
- -C
<comment_string>
- Add up to 10 comment strings to the experiment. These comments appear in
the notes section of the header and can be retrieved with the gprofng
display text command using the -header option.
- -j {on | off |
<path>}
- Controls Java profiling when the target is a JVM machine. The allowed
values for this option are:
- on
- Record profiling data for the JVM machine, and recognize methods compiled
by the Java HotSpot virtual machine. Also record Java call stacks.
- off
- Do not record Java profiling data. Profiling data for native call stacks
is still recorded.
- <path>
- Records profiling data for the JVM, and use the JVM as installed in
<path>.
- -J
<jvm-option(s)>
- Specifies one or more additional options to be passed to the JVM used. The
jvm-option(s) list must be enclosed in quotation marks if it
contains more than one option. The items in the list need to be separated
by spaces or tabs. Each item is passed as a separate option to the JVM.
Note that this option implies -j on.
- -t
<duration>[m|s]
- Collects data for the specified duration. The duration can be a single
number, optionally followed by either m to specify minutes, or
s to specify seconds, which is the default.
The duration can also consists of two numbers separated by a
minus (-) sign. If a single number is given, data is collected from the
start of the run until the given time. If two numbers are given, data is
collected from the first time to the second. In case the second time is
zero, data is collected until the end of the run. If two non-zero
numbers are given, the first must be less than the second.
- -n
- This is used for a dry run. Several run-time settings are displayed, but
the target is not executed and no performance data is collected.
- -F
{off|on|=regex}
- Control whether descendant processes should have their data recorded. To
disable/enable this feature, use off/on. Use
=regex to record data on those processes whose executable
name matches the regular expression. Only the basename of the executable
is used, not the full path. If spaces or characters interpreted by the
shell are used, enclose the regex in single quotes. The default is
-F on.
- -a
{off|on|ldobjects|src|usedldobjects|usedsrc}
- Specify archiving of binaries and other files. In addition to disable this
feature (off), or enable archiving off all loadobjects and sources
(on), the other options support a more refined selection.
All of these options enable archiving, but the keyword
controls what exactly is selected: all load objects (ldobjects), all
source files (src), the loadobjects asscoiated with a program counter
(usedldobjects), or the source files associated with a program counter
(usedsrc). The default is -a ldobjects.
- -S
{off|on|<seconds>}
- Disable (off), or enable (on) periodic sampling of process-wide resource
utilization. By default, sampling occurs every second. Use the
<seconds> option to change this. The default is -S
on.
- -y
<signal>[,r]
- Controls recording of data with the signal named <signal>,
referred to as the pause-resume signal. Whenever the given signal is
delivered to the process, switch between paused (no data is recorded) and
resumed (data is recorded) states.
By default, data collection begins in the paused state. If the
optional r is given, data collection begins in the resumed state
and data collection begins immediately.
SIGUSR1 or SIGUSR2 are recommended for this use, but any
signal that is not used by the target can be used.
- -l
<signal>
- Specify a signal that will trigger a sample of process-wide resource
utilization. When the named <signal> is delivered to the
process, a sample is recorded.
The signal can be specified using the full name, without the
initial letters "SIG", or the signal
number. Note that the kill command can be used to deliver a
signal.
If both the -l and -y options are used, the
signal must be different.
- -s
<option>[,<API>]
- Enable synchronization wait tracing, where <option> is used
to define the specifics of the tracing (on, off, <threshold>,
or all). The API is selected through the setting for <API>:
n selects native/Pthreads, j selects Java, and nj
selects both. The default is -s off.
- -H {off|on}
- Disable (off), or enable (on) heap tracing. The default is -H
off.
- -i {off|on}
- Disable (off), or enable (on) I/O tracing. The default is -i
off.
Any executable in the ELF (Executable and Linkable Format) object
format can be used for profiling with gprofng. If debug information is
available, gprofng can provide more details, but this is not a
requirement.
gprofng(1), gp-archive(1), gp-display-gui(1),
gp-display-html(1), gp-display-src(1),
gp-display-text(1)
The user guide for gprofng is maintained as a Texinfo manual. If
the info and gprofng programs are correctly installed, the
command info gprofng should give access to this document.
Copyright (c) 2022-2024 Free Software Foundation, Inc.
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document under the terms of the GNU Free Documentation License, Version 1.3
or any later version published by the Free Software Foundation; with no
Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts.
A copy of the license is included in the section entitled "GNU Free
Documentation License".