IBM XL C/C++ for Linux key features

OpenMP support

Allows you to offload compute-intensive parts of an application and associated data to the NVIDIA GPUs by using the OpenMP device constructs.

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Up to 5 levels of optimization

Tailors the optimization process for your applications with 5 distinct optimization levels; tunes the performance of your application for a typical usage scenario with Profile-directed feedback (PDF); optimizes across different files (whole-program analysis) to result in significant performance improvements with Interprocedural analysis (IPA).

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Diagnostic reports *IBM-unique

Provides important information to help you develop and debug your applications more efficiently with the compiler listings, XML reports, and HTML reports.

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Vector programming

Provides language extensions to support vector multimedia extension (VMX) and vector scalar extension (VSX) programming.

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Fullest exploitation of POWER9 *IBM-unique

Provides the architecture and tune compiler options and built-in functions to fully explore POWER9.

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High performance libraries *IBM-unique

Includes the Mathematical Acceleration Subsystem (MASS) and Basic Linear Algebra Subprograms (BLAS) libraries for high-performance mathematical computing.

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Debug capability at optimization *IBM-unique

Provide excellent debuggability such as information about inline functions, line numbers, and variables, etc. even under the -O2 optimization level. You can choose different debug levels from -g2, -g8, and -g9 based on your preference for performance or debuggability.

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Customer case study

Exceptional performance on IBM Power Systems - Journey of an HPC Researcher

Technical details

Software requirements

  • Ubuntu Server 16.04 or 18.04
  • SLES 12, SLES 12 SP3, or SLES 15
  • RHEL 7.3, RHEL 7.4, RHEL 7.5, or RHEL 7.6
  • CentOS 7

Hardware requirements

You can use any IBM Power Systems™ server as long as it is supported by your operating system distribution.

  • Approximately 200 MB for product packages
  • Minimum of 2 GB hard drive space for paging
  • Minimum of 512 MB for temporary files
  • 2 GB RAM minimum; 4 GB or more RAM recommended

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