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@@ -1,3 +1,56 @@
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+# English
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+
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+## Preparation
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+
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+The basis of the real-time expansion is the current build of the Raspberry Pi OS with standard kernel. At the time this repository was created it was 5.10.17. This build is also included in the repository. An image can easily be transferred to an SD card using the official imager. It does not matter whether the lite or full version is used, but the tests stored here were carried out with the 32-bit lite version.
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+
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+First of all, it should be checked that the installed packages are up-to-date. You will also likely need to install the git and gnuplot packages.
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+
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+```
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+sudo apt update && sudo apt upgrade
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+sudo apt install git gnuplot
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+```
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+
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+## Latency test with the standard kernel
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+
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+The OSADL has prepared a very comfortable test script for the latency times, which we use here. This measures the times between the occurrence of an event and the start of its processing. To do this, download the rt-tests repository and compile it.
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+
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+```
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+git clone git://git.kernel.org/pub/scm/linux/kernel/git/clrkwllms/rt-tests.git
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+cd rt-tests
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+make
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+```
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+
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+At the following link, a script can then be copied that carries out the test and also processes the results as text and graphics.
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+
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+https://www.osadl.org/Create-a-latency-plot-from-cyclictest-hi.bash-script-for-latency-plot.0.html
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+
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+## Installation
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+
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+Now the package with the real-time extension has to be copied and installed on the Raspi. To do this, download the image with the real-time extension from the following link:
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+
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+https://github.com/kdoren/linux/releases/tag/rpi_5.10.74-rt54
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+
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+Now carry out the following instructions:
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+
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+https://github.com/kdoren/linux/wiki/Installation-of-kernel-from-deb-package-%28Raspberry-Pi-OS%29
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+
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+Make sure you have the correct version number. After a restart you should check whether the installation was successful.
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+
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+## Latency test with the real-time kernel
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+
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+Run the test again and compare the results. Be careful not to overwrite the files the second time you run the test.
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+
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+## Hints
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+
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+All scripts and images mentioned are contained in this repository and can alternatively also be downloaded here. You can also compare your test results with the results in this repository.
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+
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+## Further sources
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+
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+https://www.embedded-software-engineering.de/echtzeit-mit-dem-raspberry-pi-und-linux-preemptrt-a-630498/
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+
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+# German
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+
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## Vorbereitungen
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Die Grundlage der Echtzeit-Erweiterung bildet der aktuelle Build des Raspberry Pi OS mit Standardkernel. Zur Zeit der Erstellung dieses Repositories war das 5.10.17. Dieser Build liegt auch dem Repository bei. Ein Image kann bequem mit dem offiziellen Imager auf eine SD-Karte übertragen werden. Es spielt keine Rolle ob die Lite- oder Full-Version genutzt wird, jedoch wurden die hier hinterlegten Tests mit der 32bit-Lite-Version durchgeführt.
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