hardware-timestamping.md

+## Usage
+
+### Requirements
+* Requirements are a kernel that supports physical timestamping.
+
+### C/C++
+
+* Hardware timestamping can be enabled per socket by calling `PrrtSocket_enable_hardware_timestamping()` in C and specifying the interface.
+
+### Python
+
+* WIP
+
+## Compiling a Hardware Timestamping-Enabled Kernel on Ubuntu
+
+* A detailed tutorial on kernel compilation can be found [here](https://help.ubuntu.com/community/Kernel/Compile).
+* Create and enter a new folder, e.g. in your home directory that will store the newly compiled kernel.
+* Run the following commands to download all resources required:
+
+```bash
+sudo apt install libncurses5 libncurses5-dev
+
+sudo apt build-dep linux-image-`uname -r`
+apt source linux-image-`uname -r`
+
+cd linux-$(uname -r | awk '{split($1,a, "-"); print a[1]}')
+```
+
+* Copy the current kernel configuration to the current folder:
+
+```bash
+cp -vi /boot/config-`uname -r` .config
+```
+
+* Edit the `.config` file and ensure the following line is present (and the option is set to `y`):
+
+```bash
+...
+CONFIG_NETWORK_PHY_TIMESTAMPING=y
+...
+```
+
+* Call `make deb-pkg` (ideally with `-j5` or some other number to speed up the compilation by using multiple cores).
+* Install the `linux-headers-*.deb` and `linux-image-*.deb` package via `dpkg -i` (where * stands for the respective kernel version).
+* Reboot the system.