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【整理】ubuntu real time Linux

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ubuntu real time

RealTime – Ubuntu Wiki

https://wiki.ubuntu.com/RealTime

realtime – Ubuntu can be used as Hard Real time OS? – Ask Ubuntu

realtime – Problem with real-time clock since upgrading to Ubuntu 17.10 – Ask Ubuntu

sound – How well does Ubuntu handle real time audio? – Ask Ubuntu

How to install Real time linux in Ubuntu ?

Ubuntu不支持实时

可参考

12.04 – How can I install a realtime kernel? – Ask Ubuntu

看看如何才能支持

Realtime Linux: OSADL – Open Source Automation Development Lab eG

想要自己编译实时内核的话

参考

12.04 – How can I install a realtime kernel? – Ask Ubuntu

去:

Realtime Linux: OSADL – Open Source Automation Development Lab eG

下载:

然后自己编译即可。

对于实时系统所支持的功能和特性以及平台,详见

Realtime Linux: OSADL – Open Source Automation Development Lab eG

Pengutronix e.K: OSADL – Open Source Automation Development Lab eG

这里提供了 已编译好的实时的Debian

相关内容

RTLF/RTLWS: OSADL – Open Source Automation Development Lab eG

RTLWS 2017: OSADL – Open Source Automation Development Lab eG

QA Farm Realtime: OSADL – Open Source Automation Development Lab eG

“Latest Stable” Realtime: OSADL – Open Source Automation Development Lab eG

Criteria of a “Latest Stable” PREEMPT_RT kernel release: OSADL – Open Source Automation Development Lab eG

Example of a stability regression: OSADL – Open Source Automation Development Lab eG

或参考

Real-time Linux: Installation on Ubuntu

注意:

Note: Booting into Real-time Linux is not recommended for day to day work on Ubuntu as the performance with Real-time Linux is slightly slow and sluggish with normal desktop environments (such as gnome, unity etc) and apps than with the normal kernel OS.

还有人尝试树莓派加上实时的

Raspberry Pi and real-time Linux: OSADL – Open Source Automation Development Lab eG

RTwiki

realtime:start [Wiki]

看起来很不错啊

-》

Index of /pub/linux/kernel/projects/rt/5.0/

Index of /pub/linux/kernel/projects/rt/4.19/

realtime:preempt_rt_versions [Wiki]

目前有2个git仓库

kernel/git/rt/linux-rt-devel.git – The current development -RT tree

有机会可以去下载和编译试试效果

有空也可以去试试:

专门针对于Ubunt去编译的实时的版本:

kernel – Install RT Linux patch for Ubuntu – Stack Overflow

和其他尝试:

How to install the real-time kernel in Ubuntu – Kevin Sookocheff

Low Latency Kernel On Ubuntu 18.04 LTS – LinuxMusicians

Realtime Linux – Patrick Dahlke – Medium

Realtime Kernels for Ubuntu

【总结】

  • 还在维护的版本=Actively maintained PREEMPT_RT versions

  • 5.0-rt Sebastian A. Siewior, development

  • 4.19-rt Steven Rostedt 2020-12

  • 4.14-rt Tom Zanussi 2020-01

  • 4.9-rt Julia Cartwight 2023-01

  • 4.4-rt Daniel Wagner 2022-02

  • 3.18-rt Tom Zanussi EOL

  • 实时系统所支持的功能和特性以及平台

  • 关于实时Ubuntu

    • 性能

    • 部分Ubuntu支持了实时的话,(大部分的)延迟也要3ms以上

  • 关于参数 -rt  -realtime

    • Q: What is the difference between an -rt kernel and a -realtime kernel?

    • A: From a technical point of view, -rt and -realtime are the same kernel. They are both based on the PREEMPT_RT patchset, although the version may be different. The main difference is that the -rt kernel should be based on the Ubuntu source tree (and therefore can use the same features, patches, enabled hardware, security fixes and so on) and should offer the same services that the Ubuntu default -generic kernel offers. For example, it should be compatible with closed video drivers (nvidia and fglrx), any external DKMS drivers, and have available backport packages. The goal of an -rt kernel is to obtain a real time variant of the Ubuntu kernel that is aligned with the -generic kernel.

    • On the other hand, the -realtime kernel is a PREEMPT_RT patched kernel based on the vanilla source tree (not the Ubuntu source). This kernel will be missing Ubuntu specific code, patches or security fixes and it isn’t guaranteed to be compatible with any external software (low level utilities, DKMS drivers and so on). It does not use the same Linux kernel version as the -generic kernel, and so these two kernels are not aligned. It is a working, upstream real-time kernel that is being used on Ubuntu. No more no less.

    去更新和安装

    sudo add-apt-repository ppa:abogani/realtime
    
    sudo gedit /etc/apt/sources.list
    deb http://ppa.launchpad.net/abogani/realtime/ubuntu precise main 
    deb-src http://ppa.launchpad.net/abogani/realtime/ubuntu precise main
    
    sudo apt-get update
    sudo apt-get install linux-realtime

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