https://github.com/jiseoup/preempt-rt
How to patch preempt RT in ubuntu 18.04.
https://github.com/jiseoup/preempt-rt
Last synced: 2 months ago
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How to patch preempt RT in ubuntu 18.04.
- Host: GitHub
- URL: https://github.com/jiseoup/preempt-rt
- Owner: Jiseoup
- Created: 2022-06-27T07:15:23.000Z (almost 3 years ago)
- Default Branch: main
- Last Pushed: 2022-06-27T11:45:00.000Z (almost 3 years ago)
- Last Synced: 2025-02-09T08:28:53.921Z (4 months ago)
- Size: 171 KB
- Stars: 1
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# PREEMPT RT PATCH on Ubuntu 18.04
This document introducing how to install **`PREEMPT RT`** on **`ubuntu 18.04`**.
I got the information from [here](https://chenna.me/blog/2020/02/23/how-to-setup-preempt-rt-on-ubuntu-18-04/).
## INSTALL DEPENDENCIES
```bash
$ sudo apt-get install build-essential libncurses-dev bison flex libssl-dev libelf-dev git
```
## DOWNLOAD AND PATCH
Download the **`linux-5.4.193`** kernel and the **`RT patch`** from [kernel.org](https://kernel.org).
```bash
$ wget https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/linux-5.4.193.tar.xz
$ wget https://mirrors.edge.kernel.org/pub/linux/kernel/projects/rt/5.4/patch-5.4.193-rt74.patch.xz
```
Extract the file and apply the patch.
```bash
$ xz -cd linux-5.4.193.tar.xz | tar xvf -
$ cd linux-5.4.193
$ xzcat ../patch-5.4.193-rt74.patch.xz | patch -p1
```
## CONFIGURATION
Copy the old config file.
```bash
$ cp -v /boot/config-$(uname -r) .config
```
## EDIT CONFIG FILE
You may have to edit the **`.config`** file.
```bash
$ vim .config
```
Search the **`CONFIG_SYSTEM_TRUSTED_KEYS`** and erase the contents inside the double quotation marks.
### Before Modification
### After Modification
## MENUCONFIG SETTINGS
You have to set the menu configuration.
```bash
$ make menuconfig
```
### Essential
```
General setup -> Preemption Model -> Fully Preemptible Kernel (Real-Time)
Processor type and features -> Timer frequency -> 1000 HZ
```
### Optional
If you want to use the kernel as a **`uniprocessor`**, follow the instructions below.
```
Processor type and features -> Symmetric multi-processing support -> [OFF]
```
Now save the menuconfig and exit.
```
Save -> Exit
```
## BUILD AND INSTALL
```bash
$ make -j $(nproc) deb-pkg
```
```bash
$ sudo dpkg -i ../linux-headers-5.4.193-rt74_5.4.193-rt74-1_amd64.deb
../linux-image-5.4.193-rt74_5.4.193-rt74-1_amd64.deb
../linux-libc-dev_5.4.193-rt74-1_amd64.deb
```
## Verification
Reboot your system and check the kernel.
```bash
$ sudo reboot
$ uname -a
```