Ubuntu / Linux 实时内核 RT Preempt 安装-Ubuntu18.04 内核

1 安装依赖项

sudo apt install build-essential git libssl-dev libelf-dev

2 下载内核源码以及 实时内核模块

wget https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/linux-5.4.19.tar.xz

wget https://mirrors.edge.kernel.org/pub/linux/kernel/projects/rt/5.4/patch-5.4.19-rt11.patch.xz

解压缩

xz -cd linux-5.4.19.tar.xz | tar xvf -

cd linux-5.4.19

xzcat ../patch-5.4.19-rt11.patch.xz | patch -p1

3 配置实时模块

cp /boot/config-5.3.0-40-generic .config

make oldconfig

Preemption Model

1. No Forced Preemption (Server) (PREEMPT_NONE)

2. Voluntary Kernel Preemption (Desktop) (PREEMPT_VOLUNTARY)

3. Preemptible Kernel (Low-Latency Desktop) (PREEMPT__LL) (NEW)

4. Preemptible Kernel (Basic RT) (PREEMPT_RTB) (NEW)

> 5. Fully Preemptible Kernel (RT) (PREEMPT_RT_FULL) (NEW)

选择“5. Fully Preemptible Kernel (RT) (PREEMPT_RT_FULL) (NEW)”

此处也可以采用make menuconfig，实现可以安装依赖 sudo apt install flex bison

4 编译

make -j8 deb-pkg

sudo dpkg -i ../linux-headers-5.4.19-rt11_5.4.19-rt11-1_amd64.deb ../linux-image-5.4.19-rt11_5.4.19-rt11-1_amd64.deb ../linux-libc-dev_5.4.19-rt11-1_amd64.deb

5 Reboot 并且验证

uname -a

6 安全设置

Add your user to realtime group

$ sudo groupadd realtime

$ sudo usermod -aG realtime $USER

add the following to /etc/security/limits.d/99-realtime.conf

$ sudo nano /etc/security/limits.d/99-realtime.conf

@realtime soft rtprio 99

@realtime soft priority 99

@realtime soft memlock 102400

@realtime hard rtprio 99

@realtime hard priority 99

@realtime hard memlock 102400