Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-11-28 15:41:40 +00:00
Code Issues Projects Releases Packages Wiki Activity

docs: fix wrong usage of proftool

Browse source 
The usage of proftool in docs is incorrect. If proftool is used without
'-o' argument, it will show the usage like following

$ ./sandbox/tools/proftool -m sandbox/System.map -t trace -f funcgraph dump-ftrace >trace.dat
Must provide trace data, System.map file and output file
Usage: proftool [-cmtv] <cmd> <profdata>

Change '>' to '-o' to fix it.

Signed-off-by: Puhan Zhou <puh4n.zhou@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Puhan Zhou 2023-08-13 13:16:19 +08:00 committed by Heinrich Schuchardt
parent 4ad85a9fea
commit aab60a5128
1 changed files with 3 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
doc/develop/trace.rst
View file

@ -139,7 +139,7 @@ There is a -f option available to select a function graph:
.. code-block:: console
$ ./sandbox/tools/proftool -m sandbox/System.map -t trace -f funcgraph dump-ftrace >trace.dat
$ ./sandbox/tools/proftool -m sandbox/System.map -t trace -f funcgraph dump-ftrace -o trace.dat
Again, you can use kernelshark or trace-cmd to look at the output. In this case
you will see the time taken by each function shown against its exit record.
@ -171,7 +171,7 @@ command:
.. code-block:: console
$ ./sandbox/tools/proftool -m sandbox/System.map -t trace dump-flamegraph >trace.fg
$ ./sandbox/tools/proftool -m sandbox/System.map -t trace dump-flamegraph -o trace.fg
$ flamegraph.pl trace.fg >trace.svg
You can load the .svg file into a viewer. If you use Chrome (and some other
@ -191,7 +191,7 @@ spend in each call stack:
.. code-block:: console
$ ./sandbox/tools/proftool -m sandbox/System.map -t trace dump-flamegraph -f timing >trace.fg
$ ./sandbox/tools/proftool -m sandbox/System.map -t trace dump-flamegraph -f timing -o trace.fg
$ flamegraph.pl trace.fg >trace.svg
Note that trace collection does slow down execution so the timings will be