SUSE Linux Enterprise Real Time 15 SP2

Release Notes

SUSE Linux Enterprise Real Time is an integrated suite of robust open source
real-time technologies that enable enterprises to implement solutions with
controlled response times. This document gives an overview of features of SUSE
Linux Enterprise Real Time and their limitations. Note that this document apply
to the x86_64 architecture only and might refer to Real Time specific details.

Manuals can be found in the docu directory of the installation media, or in the
directory /usr/share/doc/ on the installed system (if installed).

Publication Date: 2019-10-20 , Version: 15.2.20191020

1 SUSE Linux Enterprise Real Time
2 What's New?
3 Installation
4 Support Statement for SUSE Linux Enterprise Real Time 15 SP2
5 How to Obtain Source Code
6 More Information and Feedback

1 SUSE Linux Enterprise Real Time

SUSE Linux Enterprise Real Time is an integrated suite of robust open source
real-time technologies that enable enterprises to implement solutions with
controlled response times.

SUSE Linux Enterprise Real Time enables usage of SUSE Linux Enterprise Server
based technologies in environments where having control over latencies is a
critical requirement.

Its open source license minimizes the risk of vendor lock-in, and its adherence
to open standards encourages interoperability with industry standard tools and
technologies.

2 What's New?

This section includes an overview of some of the major features and new
functionality provided by SUSE Linux Enterprise Real Time 15 SP2.

  o The kernel has inherited hardware enablement and part of new features of
    SUSE Linux Enterprise Server 15 SP2 kernel.

  o The latest stable 5.3 PREEMPT_RT has been incorporated into the service
    pack.

  o LTTng tools package has been updated to version 2.10 and moved to the
    Development Tools Module 15 SP2. SUSE Linux Enterprise Real Time 15 SP2
    carries kernel module packages needed for operation of LTTng.

  o LTTng Userspace Tracing has been fully enabled in the product.

  o Support for Precision Time Protocol version 2 continues to be available
    through the base SUSE Linux Enterprise Server 15 SP2 product.

  o RT-Tests suite has been updated to version 1.3, the suite contains programs
    to test various real time Linux features.

  o Cpuset has been updated to version 1.6, it allows manipulation of cpusets
    on the system and provides higher level functions such as implementation
    and control of a basic CPU shielding setup.

  o SUSE Linux Enterprise Real Time 15 SP2 enables the SCHED_DEADLINE
    scheduling class as a Technology Preview ( best-effort support ). This
    scheduler predicts task scheduling based on application deadlines, which is
    particularly useful for realtime workload.

  o To support the use of virtualization to separate system components and to
    help with creating higher dense systems, SUSE Linux Enterprise Real Time 15
    SP2 supports the following features as a Technology Preview ( best-effort
    support ).

      ? Supported guests for non-realtime sensitive workloads.

      ? Supported docker containers and real-time capabilities.

      ? Supports the realtime sensitive workloads guests, which means that
        customer can install both RT and non-RT VM on a single machine. With
        proper system settings and application analysis, RT guest and Non-RT
        guest not only can co-exist but also not interfere or affect each other

3 Installation

Please refer to the Section Two of SUSE Linux Enterprise Real Time Quick Start
Guide.

During installation, there are 2 system roles that could be selected. One is
Real Time ( GUI mode ) and the other is Real Time ( Text mode ).

After installation, end user may find that the Real Time kernel may not be the
default one. It is because the kernel-rt and kernel-default is sorting by the
version number. In order to set the default kernel, end user can go to "YaST',
find the "Boot Loader", and click on the "Bootloader Options" tab. Select the
kernel-rt from the "Default Boot Section" and press "OK" to save the changes.
Real Time Kernel will be the default one at the next boot.

4 Support Statement for SUSE Linux Enterprise Real Time 15 SP2

SUSE Linux Enterprise Real Time follows the same support policy as SUSE Linux
Enterprise Server 15 SP2.

Support requires an appropriate subscription from SUSE; for more information,
see http://www.suse.com/products/server/.

5 How to Obtain Source Code

This SUSE product includes materials licensed to SUSE under the GNU General
Public License (GPL). The GPL requires SUSE to provide the source code that
corresponds to the GPL-licensed material. The source code is available for
download at http://www.suse.com/download-linux/source-code.html. Also, for up
to three years after distribution of the SUSE product, upon request, SUSE will
mail a copy of the source code. Requests should be sent by e-mail to
mailto:sle_source_request@suse.com or as otherwise instructed at http://
www.suse.com/download-linux/source-code.html. SUSE may charge a reasonable fee
to recover distribution costs.

6 More Information and Feedback

  o Read the READMEs on the CDs.

  o Get detailed changelog information about a particular package from the RPM:

    rpm --changelog -qp <FILENAME>.rpm

    <FILENAME>. is the name of the RPM.

  o Check the ChangeLog file in the top level of CD1 for a chronological log of
    all changes made to the updated packages.

  o Find more information in the docu directory of CD1 of the SUSE Linux
    Enterprise Real Time CDs. This directory includes a PDF version of the Real
    Time Guide.

  o https://www.suse.com/documentation/slerte-12/ contains additional or
    updated documentation for SUSE Linux Enterprise Real Time 15 SP2.

  o Visit http://www.suse.com/products/ for the latest product news from SUSE
    and http://www.suse.com/download-linux/source-code.html for additional
    information on the source code of SUSE Linux Enterprise products.

Copyright (C) 2010- 2019 SUSE LLC.

Thanks for using SUSE Linux Enterprise Real Time in your business.

The SUSE Linux Enterprise Real Time Team.

(C) 2019 SUSE

