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SUSE Linux Enterprise Real Time 12 SP5

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. This document apply to the x86_64 architecture only.

SUSE Linux Enterprise Real Time consists of the base Server image plus the Real Time image. The documentation might refer to Real Time specific details as SUSE Linux Enterprise Real Time.

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: 2020-09-25 , Version: 12.5.20200107

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 12 SP5.

  • The kernel has inherited hardware enablement and part of new features of SUSE Linux Enterprise Server 12 SP5 kernel.

  • The latest stable 4.12 PREEMPT_RT has been incorporated into the service pack.

  • LTTng tools package has been updated to version 2.10 and moved to the base SUSE Linux Enterprise Server 12 SP5 product. SUSE Linux Enterprise Real Time 12 SP5 carries kernel module packages needed for operation of LTTng on top of SUSE Linux Enterprise Real Time 12 SP5 kernel.

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

  • Support for Precision Time Protocol version 2 continues to be available through the base SUSE Linux Enterprise Server 12 SP5 product.

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

  • 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.

  • SUSE Linux Enterprise Real Time 12 SP5 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.

  • The media includes the kernel-rt_debug flavor for developer to execute Hardware Latency Detector to detect large system latencies. It is caused by the behavior of underlying hardware or firmware, independent of Linux itself.

  • To support the use of virtualization to separate system components and to help with creating higher dense systems, SUSE Linux Enterprise Real Time 12 SP5 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 Chapter One of SUSE Linux Enterprise Real Time Quick Start Guide.

For successful upgrade from SUSE Linux Enterprise Real Time 12 SP4 to SUSE Linux Enterprise Real Time 12 SP5, end user needs to select the SUSE Linux Enterprise Real Time from SUSE Linux Enterprise Server extension list.

4 Support Statement for SUSE Linux Enterprise Real Time 12 SP5

SUSE Linux Enterprise Real Time follows the same support policy as SUSE Linux Enterprise Server 12 SP5.

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

  • Read the READMEs on the CDs.

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

    rpm --changelog -qp <FILENAME>.rpm

    <FILENAME>. is the name of the RPM.

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

  • 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.

  • https://www.suse.com/documentation/slerte-12/ contains additional or updated documentation for SUSE Linux Enterprise Real Time 12 SP5.

  • 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 © 2010- 2020 SUSE LLC.

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

The SUSE Linux Enterprise Real Time Team.

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