版本 16333fa0de9ac3e293b398230e1a9bd221965d8a

embedded/xenomai

Changes from 16333fa0de9ac3e293b398230e1a9bd221965d8a to 3a0f5b19d09875d7f93b0b5e6c216e53b4eadc02

---
title: Xenomai
categories: embedded, arm, raspberrypi
toc: no
...

組員
----

作業系統架構
------------
* 與 RT-PREEMPT 途徑的差異？

硬體驅動原理
------------
* 硬體使用 Raspberry Pi

效能表現
--------
* `Cyclictest<https://rt.wiki.kernel.org/index.php/Cyclictest>`_
* Test case: POSIX interval timer, Interval 500 micro seconds,. 100000 loops, 100% load.
  - Commandline: cyclictest -t1 -p 80 -i 500 -l 100000

* 使用 RT-PREEMPT

.. code-block:: prettyprint

    Linux raspberrypi 3.6.11+ #474 PREEMPT Thu Jun 13 17:14:42 BST 2013 armv6l GNU/Linux
    Min:     22 Act:   31 Avg:   32 Max:     169

* 使用 Xenomai

.. code-block:: prettyprint

    Linux raspberrypi 3.8.13-core+ #1 Thu Feb 27 03:02:16 CST 2014 armv6l GNU/Linux
    Min:      1 Act:    5 Avg:    6 Max:      41

參考資料
--------
* https://code.google.com/p/picnc/wiki/RPiXenomaiKernel
* https://code.google.com/p/picnc/wiki/CreateRaspbianLinuxCNC
* http://www.camelsoftware.com/firetail/blog/raspberry-pi/real-time-operating-systems/