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About

psrecord is a small utility that uses the psutil <https://github.com/giampaolo/psutil/>__ library to record the CPU and memory activity of a process. The package is still under development and is therefore experimental.

The code is released under a Simplified BSD License, which is given in the LICENSE file.

Requirements

• Python 2.7 or 3.3 and higher
• psutil <https://code.google.com/p/psutil/>__ 1.0 or later
• matplotlib <http://www.matplotlib.org>__ (optional, used for plotting)

Installation

To install, simply do::

pip install psrecord

Usage

Basics

To record the CPU and memory activity of an existing process to a file (use sudo for a root process):

::

psrecord 1330 --log activity.txt

where 1330 is an example of a process ID which you can find with ps or top. You can also use psrecord to start up a process by specifying the command in quotes:

::

psrecord "hyperion model.rtin model.rtout" --log activity.txt

Plotting

To make a plot of the activity:

::

psrecord 1330 --plot plot.png

This will produce a plot such as:

.. image:: https://github.com/astrofrog/psrecord/raw/master/screenshot.png

You can combine these options to write the activity to a file and make a plot at the same time:

::

psrecord 1330 --log activity.txt --plot plot.png

Duration and intervals

By default, the monitoring will continue until the process is stopped. You can also specify a maximum duration in seconds:

::

psrecord 1330 --log activity.txt --duration 10

Finally, the process is polled as often as possible by default, but it is possible to set the time between samples in seconds:

::

psrecord 1330 --log activity.txt --interval 2

Subprocesses

To include sub-processes in the CPU and memory stats, use:

::

psrecord 1330 --log activity.txt --include-children

Running tests

To run tests, you will need pytest <https://docs.pytest.org/en/latest/>_. You can install it with::

pip install pytest

You can then run the tests with::

pytest psrecord

Reporting issues

Please report any issues in the issue tracker <https://github.com/astrofrog/psrecord/issues>__.

.. |Build Status| image:: https://travis-ci.org/astrofrog/psrecord.svg?branch=master :target: https://travis-ci.org/astrofrog/psrecord .. |Coverage Status| image:: https://codecov.io/gh/astrofrog/psrecord/branch/master/graph/badge.svg :target: https://codecov.io/gh/astrofrog/psrecord