linux/tools/tracing/rtla
Daniel Bristot de Oliveira 1f428356c3 rtla: Add hwnoise tool
The hwnoise tool is a special mode for the osnoise top tool.

hwnoise dispatches the osnoise tracer and displays a summary of the noise.
The difference is that it runs the tracer with the OSNOISE_IRQ_DISABLE
option set, thus only allowing only hardware-related noise, resulting in
a simplified output. hwnoise has the same features of osnoise.

An example of the tool's output:

 # rtla hwnoise -c 1-11 -T 1 -d 10m -q
                                           Hardware-related Noise
 duration:   0 00:10:00 | time is in us
 CPU Period       Runtime        Noise  % CPU Aval   Max Noise   Max Single          HW          NMI
   1 #599       599000000          138    99.99997           3            3           4           74
   2 #599       599000000           85    99.99998           3            3           4           75
   3 #599       599000000           86    99.99998           4            3           6           75
   4 #599       599000000           81    99.99998           4            4           2           75
   5 #599       599000000           85    99.99998           2            2           2           75

Link: https://lkml.kernel.org/r/2d6f49a6f3a4f8b51b2c806458b1cff71ad4d014.1675805361.git.bristot@kernel.org

Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Cc: Daniel Bristot de Oliveira <bristot@kernel.org>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Clark Williams <williams@redhat.com>
Cc: Bagas Sanjaya <bagasdotme@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2023-02-13 23:56:46 -05:00
..
src rtla: Add hwnoise tool 2023-02-13 23:56:46 -05:00
Makefile rtla: Add hwnoise tool 2023-02-13 23:56:46 -05:00
README.txt rtla: Remove procps-ng dependency 2022-05-26 15:20:46 -04:00

RTLA: Real-Time Linux Analysis tools

The rtla meta-tool includes a set of commands that aims to analyze
the real-time properties of Linux. Instead of testing Linux as a black box,
rtla leverages kernel tracing capabilities to provide precise information
about the properties and root causes of unexpected results.

Installing RTLA

RTLA depends on the following libraries and tools:

 - libtracefs
 - libtraceevent

It also depends on python3-docutils to compile man pages.

For development, we suggest the following steps for compiling rtla:

  $ git clone git://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git
  $ cd libtraceevent/
  $ make
  $ sudo make install
  $ cd ..
  $ git clone git://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git
  $ cd libtracefs/
  $ make
  $ sudo make install
  $ cd ..
  $ cd $rtla_src
  $ make
  $ sudo make install

For further information, please refer to the rtla man page.