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Benefits of outputing trace data as raw data:
- Smaller trace data size
- More convenient to add new trace entry. There is no need to change acrntrace
when we add new trace entry to HV. All we need do is to update the analysis
scripts to deal with this situation.
Trace data size(with 1 UOS):
~57M -- with patch
~137M -- without patch
Signed-off-by: Kaige Fu <kaige.fu@intel.com>
Reviewed-by: Yan, Like <like.yan@intel.com>
Reviewed-by: Geoffroy Van Cutsem <geoffroy.vancutsem@intel.com>
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|---|---|---|
| .. | ||
| scripts | ||
| acrntrace.c | ||
| acrntrace.h | ||
| Makefile | ||
| README.rst | ||
| sbuf.c | ||
| sbuf.h | ||
.. _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 python2 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 bash and python2.
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.