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docs/manual: add section about size graphing

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Document the new graph-size target and its possibilities.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Thomas Petazzoni 2015-10-17 15:33:45 +02:00
parent 24c75fbb38
commit 10f7a256a3
1 changed files with 41 additions and 0 deletions
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docs/manual/common-usage.txt
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@ -273,6 +273,47 @@ only other format supported is PNG:
BR2_GRAPH_OUT=png make graph-build
----------------
=== Graphing the filesystem size contribution of packages
When your target system grows, it is sometimes useful to understand
how much each Buildroot package is contributing to the overall root
filesystem size. To help with such an analysis, Buildroot collects
data about files installed by each package and using this data,
generates a graph and CSVs files detailing the size contribution of
the different packages.
To generate these data after a build, run:
----------------
make graph-size
----------------
This will generate:
* +output/graphs/graph-size.pdf+, a pie chart of the contribution of
each package to the overall root filesystem size
* +output/graphs/package-size-stats.csv+, a CSV file giving the size
contribution of each package to the overall root filesystem size
* +output/graphs/file-size-stats.csv+, a CSV file giving the size
contribution of each installed file to the package it belongs, and
to the overall filesystem size.
This +size-stats+ target requires the Python Matplotlib library to be
installed (+python-matplotlib+ on most distributions), and also the
+argpase+ module if you're using a Python version older than 2.7
(+python-argparse+ on most distributions).
Just like for the duration graph, a +BR2_GRAPH_OUT+ environment is
supported to adjust the output file format. See xref:graph-depends[]
for details about this environment variable.
.Note
The collected filesystem size data is only meaningful after a complete
clean rebuild. Be sure to run +make clean all+ before using +make
size-stats+.
include::eclipse-integration.txt[]
include::advanced.txt[]