.. _acrntrace:
acrntrace
#########
Description
***********
``acrntrace`` is a tool running on the Service OS (SOS) to capture trace data.
A ``scripts`` directory includes scripts to analyze the trace data.
Usage
*****
1. On the SOS, clear buffers before starting a trace, with:
.. code-block:: none
# acrntrace -c
#. Start capturing buffered trace data with:
.. code-block:: none
# acrntrace
Trace files are created under ``/tmp/acrntrace/``, with a
date-time-based directory name such as ``20171115-101605``
#. When done, stop a running ``acrntrace``, with:
.. code-block:: none
q <enter>
#. Analysis of the collected data is done on a Linux PC, so you'll need
to copy the collected trace data to your Linux system (using ``scp`` is
recommended):
.. code-block:: none
# scp -r /tmp/acrntrace/20171115-101605/ \
username@hostname:/home/username/trace_data
Replace username and hostname with appropriate values.
#. On the Linux system, run the provided Python3 script to analyze the
``vm_exits`` (currently only vm_exit analysis is supported):
.. code-block:: none
# acrnalyze.py -i /home/xxxx/trace_data/20171115-101605/0 \
-o /home/xxxx/trace_data/20171115-101605/cpu0 --vm_exit
- A preprocess makes some changes to the datafile for processing but
a copy of the original data file is saved with suffix ``.orig``.
- Analysis report is written to stdout, or to a CSV file if
a filename is specified using ``-o filename``.
- The scripts require Python3.
Build and Install
*****************
The source files for ``acrntrace`` are in the ``tools/acrntrace`` folder,
and can be built and installed using:
.. code-block:: none
# make
# make install
The processing scripts are in ``tools/acrntrace/scripts`` and need to be
copied to and run on your Linux system.
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