IBM® SDK, Java™ Technology Edition, Version 7 Release 1



64-bit Linux little endian (LE) user guide for IBM SDK, Java
Technology Edition, Version 7 Release 1


Contents

Overview
Supported environments
Considerations for existing Java applications
Known issues and limitations
Notices
Privacy Policy Considerations
Trademarks
Index

Overview

Information about the Little Endian (LE) release of the SDK.

An LE version of IBM® SDK, Java™ Technology Edition, Version 7 Release 1 is available that runs on 64-bit Linux with Open POWER® Application Binary Interface (ABI).

You can determine whether a system is Big Endian or Little Endian by using the following system property: System.getProperty("sun.cpu.endian").

The following example shows the output from the java -version command on a LE version of the SDK:

Java(TM) SE Runtime Environment (build pxl6470_27sr1-20140401_02(SR1))
IBM J9 VM (build 2.7, JRE 1.7.0 Linux ppc64le-64 Compressed References 20140331_194701 (JIT enabled, AOT enabled)
J9VM - R27_jvm.27_20140331_2128_B194701
JIT  - tr.r13.java_20140328_60470
GC   - R27_jvm.27_20140331_2128_B194701_CMPRSS
J9CL - 20140331_194701)
JCL - 20140327_01 based on Oracle 7u55-b13

Conventions

Linux architectures are identified within directory names by variables. The following table shows all the possible Linux architecture values, including the variable ppc64le for PPC 64-bit (Little Endian).

Table 1. Linux architecture values for directories
Linux architecture Value of <arch>
IA® 32-bit i386
AMD 64-bit x86_64 for install_dir and amd64 for lib_dir
PPC 32-bit ppc
PPC 64-bit (Big Endian) ppc64
PPC 64-bit (Little Endian) ppc64le
System z® 31-bit s390
System z 64-bit s390x

install_dir

The installation directory is referred to as install_dir in this documentation. The default installation directory is as follows:

For example:

lib_dir
The Java library directory is referred to as lib_dir in this documentation. The library directory is as follows:

Supported environments

This release is supported on certain hardware platforms and operating systems.

The following hardware is supported:

The following table shows the operating systems supported for the 64-bit POWER architecture. The table also indicates the SDK service refresh (SR) level that includes support for a particular operating system:

Table 2. Linux environments tested
Hardware POWER 64-bit
Release address space 64-bit
Ubuntu 14.04 SR1

Considerations for existing Java applications

Considerations for running existing Java applications in the Little Endian (LE) Runtime Environment.

Because Java applications are typically platform-neutral, they can run on an LE Runtime Environment without modification. However, the following areas of Java code are platform-sensitive and might cause portability issues:

Known issues and limitations

Known issues or limitations that you might encounter with this release.

In this release of the SDK and Runtime Environment the following limitations apply:

Notices

This information was developed for products and services offered in the U.S.A.

IBM may not offer the products, services, or features discussed in this document in other countries. Consult your local IBM representative for information on the products and services currently available in your area. Any reference to an IBM product, program, or service is not intended to state or imply that only that IBM product, program, or service may be used. Any functionally equivalent product, program, or service that does not infringe any IBM intellectual property right may be used instead. However, it is the user's responsibility to evaluate and verify the operation of any non-IBM product, program, or service.

IBM may have patents or pending patent applications covering subject matter described in this document. The furnishing of this document does not grant you any license to these patents. You can send license inquiries, in writing, to:

For license inquiries regarding double-byte character set (DBCS) information, contact the IBM Intellectual Property Department in your country or send inquiries, in writing, to:

The following paragraph does not apply to the United Kingdom or any other country where such provisions are inconsistent with local law:

INTERNATIONAL BUSINESS MACHINES CORPORATION PROVIDES THIS PUBLICATION "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow disclaimer of express or implied warranties in certain transactions, therefore, this statement may not apply to you.

This information could include technical inaccuracies or typographical errors. Changes are periodically made to the information herein; these changes will be incorporated in new editions of the publication. IBM may make improvements and/or changes in the product(s) and/or the program(s) described in this publication at any time without notice.

Any references in this information to non-IBM Web sites are provided for convenience only and do not in any manner serve as an endorsement of those Web sites. The materials at those Web sites are not part of the materials for this IBM product and use of those Web sites is at your own risk.

IBM may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligation to you.

Licensees of this program who wish to have information about it for the purpose of enabling: (i) the exchange of information between independently created programs and other programs (including this one) and (ii) the mutual use of the information which has been exchanged, should contact:

Such information may be available, subject to appropriate terms and conditions, including in some cases, payment of a fee.

The licensed program described in this document and all licensed material available for it are provided by IBM under terms of the IBM Customer Agreement, IBM International Program License Agreement or any equivalent agreement between us.

Any performance data contained herein was determined in a controlled environment. Therefore, the results obtained in other operating environments may vary significantly. Some measurements may have been made on development-level systems and there is no guarantee that these measurements will be the same on generally available systems. Furthermore, some measurements may have been estimated through extrapolation. Actual results may vary. Users of this document should verify the applicable data for their specific environment.

Information concerning non-IBM products was obtained from the suppliers of those products, their published announcements or other publicly available sources. IBM has not tested those products and cannot confirm the accuracy of performance, compatibility or any other claims related to non-IBM products. Questions on the capabilities of non-IBM products should be addressed to the suppliers of those products.

All statements regarding IBM's future direction or intent are subject to change or withdrawal without notice, and represent goals and objectives only.

COPYRIGHT LICENSE:

This information contains sample application programs in source language, which illustrate programming techniques on various operating platforms. You may copy, modify, and distribute these sample programs in any form without payment to IBM, for the purposes of developing, using, marketing or distributing application programs conforming to the application programming interface for the operating platform for which the sample programs are written. These examples have not been thoroughly tested under all conditions. IBM, therefore, cannot guarantee or imply reliability, serviceability, or function of these programs. The sample programs are provided "AS IS", without warranty of any kind. IBM shall not be liable for any damages arising out of your use of the sample programs.

Each copy or any portion of these sample programs or any derivative work, must include a copyright notice as follows:

© (your company name) (year). Portions of this code are derived from IBM Corp. Sample Programs. © Copyright IBM Corp. _enter the year or years_.

If you are viewing this information softcopy, the photographs and color illustrations may not appear.

Privacy Policy Considerations

IBM Software products, including software as a service solutions, ("Software Offerings") may use cookies or other technologies to collect product usage information, to help improve the end user experience, to tailor interactions with the end user or for other purposes. In many cases no personally identifiable information is collected by the Software Offerings. Some of our Software Offerings can help enable you to collect personally identifiable information. If this Software Offering uses cookies to collect personally identifiable information, specific information about this offering’s use of cookies is set forth below.

This Software Offering does not use cookies or other technologies to collect personally identifiable information.

If the configurations deployed for this Software Offering provide you as customer the ability to collect personally identifiable information from end users via cookies and other technologies, you should seek your own legal advice about any laws applicable to such data collection, including any requirements for notice and consent.

For more information about the use of various technologies, including cookies, for these purposes, see: (i) IBM’s Privacy Policy at http://www.ibm.com/privacy ; (ii) IBM’s Online Privacy Statement at http://www.ibm.com/privacy/details (in particular, the section entitled "Cookies, Web Beacons and Other Technologies"); and (iii) the "IBM Software Products and Software-as-a-Service Privacy Statement" at http://www.ibm.com/software/info/product-privacy.

Trademarks

IBM, the IBM logo, and ibm.com are trademarks or registered trademarks of International Business Machines Corporation in the United States, other countries, or both. If these and other IBM trademarked terms are marked on their first occurrence in this information with a trademark symbol (® or ™), these symbols indicate U.S. registered or common law trademarks owned by IBM at the time this information was published. Such trademarks may also be registered or common law trademarks in other countries. A current list of IBM trademarks is available on the Web at Copyright and trademark information.

Intel, Intel logo, Intel Inside logo, Intel Centrino, Intel Centrino logo, Celeron, Intel Xeon, Intel SpeedStep, Itanium, and Pentium are trademarks of Intel Corporation in the United States, other countries, or both.

Java and all Java-based trademarks and logos are trademarks or registered trademarks of Oracle and/or its affiliates.

Linux is a registered trademark of Linus Torvalds in the United States, other countries, or both.

Microsoft, Windows, Windows NT and the Windows logo are trademarks of Microsoft Corporation in the United States, other countries, or both.

UNIX is a registered trademark of The Open Group in the United States and other countries.

Other company, product and service names may be trademarks or service marks of others.

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