[Buildroot] [PATCH v4 2015.08 4/4] docs/manual: add section about size graphing

Thomas Petazzoni thomas.petazzoni at free-electrons.com
Mon May 25 21:56:47 UTC 2015


Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
---
 docs/manual/common-usage.txt | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/docs/manual/common-usage.txt b/docs/manual/common-usage.txt
index 5b27b1f..c7a14ce 100644
--- a/docs/manual/common-usage.txt
+++ b/docs/manual/common-usage.txt
@@ -273,6 +273,45 @@ 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
+some data about which package installs which file, and can generate
+graphs and CSVs files with the relevant data.
+
+To generate these data after a build, run:
+
+----------------
+make size-stats
+----------------
+
+This will generate:
+
+* +output/graphs/graph-size+, a pie chart of the contribution of each
+  package to the overall root filesystem size
+
+* +output/build/package-size-stats.csv+, a CSV file giving the size
+  contribution of each package to the overall root filesystem size
+
+* +output/build/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.
+
+.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[]
-- 
2.1.0




More information about the buildroot mailing list