114 IBM Power 770 and 780 (9117-MMD, 9179-MHD) Technical Overview and Introduction
For information about SUSE Linux Enterprise Server, go to:
http://www.novell.com/products/server
For information about Red Hat Enterprise Linux Advanced Server, go to:
http://www.redhat.com/rhel/features
2.13.5 Java versions that are supported
There are unique considerations when running Java 1.4.2 on POWER7 or POWER7+
servers. For best use of the performance capabilities and most recent improvements of
POWER7 technology, upgrade Java-based applications to Java 7, Java 6, or Java 5 when
possible. For more information, visit:
http://www.ibm.com/developerworks/java/jdk/aix/service.html
2.13.6 Boosting performance and productivity with IBM compilers
IBM XL C, XL C/C++, and XL Fortran compilers for AIX and for Linux use the latest
POWER7+ processor architecture. Release after release, these compilers continue to help
improve application performance and capability, exploiting architectural enhancements that
are made available through the advancement of the POWER technology.
IBM compilers are designed to optimize and tune your applications for execution on IBM
POWER platforms, to help you unleash the full power of your IT investment, to create and
maintain critical business and scientific applications, to maximize application performance,
and to improve developer productivity.
The performance gain from years of compiler optimization experience is seen in the
continuous release-to-release compiler improvements that support the POWER4 processors,
through to POWER4+, POWER5, POWER5+, POWER6, and POWER7 processors, and now
including the POWER7+ processors. With the support of the latest POWER7+ processor
chip, IBM advances a more than a 20-year investment in the XL compilers for POWER series
and IBM PowerPC® series architectures.
XL C, XL C/C++, and XL Fortran features that are introduced to use the latest POWER7+
processor include the following items:
Vector unit and vector scalar extension (VSX) instruction set to efficiently manipulate
vector operations in your application
Vector functions within the Mathematical Acceleration Subsystem (MASS) libraries for
improved application performance
Built-in functions or intrinsics and directives for direct control of POWER instructions at the
application level
Architecture and tune compiler options to optimize and tune your applications
COBOL for AIX enables you to selectively target code generation of your programs to
either exploit POWER7+ systems architecture or to be balanced among all supported
POWER systems. The performance of COBOL for AIX applications is improved by means
of an enhanced back-end optimizer. With the back-end optimizer, a component common also
to the IBM XL compilers, your applications can use the most recent industry-leading
optimization technology.
The performance of PL/I for AIX applications is improved through both front-end changes and
back-end optimizer enhancements. With the back-end optimizer, a component common also
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