C/C++ and Fortran


Operating Systems

The core of your mission-critical workloads: AIX, IBM i, and Enterprise Linux


ISV Solutions

Stay up to date with key capabilities running on POWER such as SAP

Business Continuity

Learn how to keep critical processes running and adapt quickly with PowerHA


Power Security

Protect your most sensitive data anywhere in your hybrid cloud


Check here for virtualization and management needs: HMC & CMC, PowerVC, and PowerVM

Open Source

Join our open source efforts within the IBM Power Systems portfolio

Enterprise Infrastructure as a Service

Achieve business growth with agility and flexibility with our enterprise IaaS in Power Virtual Server

Programming Languages

The hub for Programming Languages

Check It Out! Youtube demo to help maximize your IBM POWER 8 hardware investment

By Archive User posted Thu April 23, 2015 03:39 PM


Originally posted by: Jinsong JI

Want to maximize your IBM POWER 8 hardware investment? You will need the latest XL C/C++ V13.1.1 compiler to fully exploit the POWER 8 hardware capabilities and take advantage of the compiler's industry-leading advanced optimization technology. This demo shows how the suggested optimization levels (-O2 -qipa, -O3, -O3 -qhot) provided by the XL C/C++ compiler can gradually get the best performance for your workload/application.  The demo also shows the resulting execution speed comparison between XL C/C++ and the GCC compiler. Two typical benchmarks in SPEC2006 are used for this demo (namd from FP and libquantum from INT).




Maximizing workload performance