By: Wainer dos Santos Moschetta. Want to watch some nice demonstration videos of PowerLinux SDK 1.2 new features? There were published two demonstration videos in DeveloperWorks as follows: 1. Introduction to the Cycles Per Instruction analysis tool. Watch here the demo starring CPI Tool! 2. Introduction to the Migration Advisor quick fixes. Watch here the demo starring Migration Advisor! The complete demo series about the IBM SDK for PowerLinux can be found here . More videos to be come...stay tuned in!
By: Carlos Seo. The IBM Advance Toolchain for PowerLinux is a set of open source development tools and runtime libraries that allow users to take leading edge advantage of IBM's latest POWER hardware features on Linux. A new update release is now available, and it features:
Performance enhancements in libstdc++ for Power. Valgrind is updated to version 3.8.1.
For download links, more information and documentation, please refer to our official documentation page .
Please let us know if you have any questions about this... [More]
By: Jenifer Hopper. More details on CPU utilization issues
I recently posted about a RHEL6.3 kernel update that resolves a CPU utilization bug in this blog . Since then I have received a few questions asking for more details, so I want to share those here. Q: The problem was in /proc/stat? What was the issue? A: Yes, there was a bug that caused incorrect idle and iowait values to be displayed in /proc/stat. The main issue was a change that caused an incorrect divisor to be used (msec vs. usec). Q: Do I need to update my profiling... [More]
By: Jenifer Hopper.
Fixing CPU utilization metrics on RHEL 6.3
As reported earlier in a blog post , the standard RHEL 6.3 kernel has issues with correctly calculating CPU utilization values .
(For more insights into the fix below, see a different blog post )
** Note: The specific zstream kernel version mentioned in this article was the most recent at the time of publication. Newer RHEL 6.3 zstream kernel releases should contain this... [More]
By: Rafael Folco. Practical experiences with setting up a cluster
I recently have had the opportunity to work with the IBM InfoSphere BigInsights product on PowerLinux. From these experiences, I created a wiki page which describes some hints and tips on setting up a cluster for BigInsights. The BigInsights product provides for serious hadoop-based processing and is available on the PowerLinux base. If you have questions on taking advantage of BigInsights and hadoop on Power systems, ask a question on the PowerLinux message... [More]
By: Beth Taylor. As of today, IBM® Software Development Kit for PowerLinux 1.2 is now available for download from the IBM Software Development Toolkit for PowerLinux page About IBM Software Development Toolkit for PowerLinux 1.2 IBM SDK for PowerLinux is a free, Eclipse-based Integrated Development Environment (IDE) for application development on IBM PowerLinux™ and IBM Power Systems™ servers running Linux. The IBM SDK for PowerLinux integrates C/C++ source development with the IBM Advance Toolchain for PowerLinux and classic Linux... [More]
By: Bill Buros. Saw this over on the IBM Research blog. Very nice! The IBM Power 775 is an amazing server. In this publish, Redhat Linux Version 6.2 is used. IBM’s Power 775 wins recent HPC Challenge Starting out as a government project 10 years ago, IBM Research’s high performance computing project, PERCS (pronounced “perks”), led to one of the world’s most powerful supercomputers, the Power 775. This July, the Power 775 continued to prove its power by earning the top spot in a series of benchmark components of the HPC Challenge... [More]
By: Jeff Scheel. My customer presentation last week in Livermore, CA allowed me to take PowerLinux to "new depths" by presenting in a wine cellar! Check out the photo of the cellar entrance I posted out in Google+. While you're out there, feel free to follow
Jeff Scheel on
Besides the unique location, this event really forced me to consolidate my thoughts into a concise message on PowerLinux. Here were the 3 main points (all good things come in three's...it's the "magic number"): PowerLinux... [More]
By: Bill Buros. So this is very nice. The good team over on Power IT pro has been steadily increasing the presence of technical information around Linux and Power systems. I follow their email newsletter and enjoy the technical hints and tips they provide. Yesterday, Erwin Earley started a new blog on PowerITpro focused specifically on the world of Linux and Power. Quoting from their latest page: Introducing Our New Power Linux Blog We're starting a new POWER IT Pro blog targeted specifically at those who are responsible for... [More]
By: Carlos Seo. The IBM Advance Toolchain for PowerLinux is a set of open source development tools and runtime libraries which allows users to take leading edge advantage of IBM's latest POWER hardware features on Linux. A new update release is now available, and it features: Bug fixes for DFP in GCC. Fix to address over counting user context lost samples in Oprofile. GDB now displays correctly the vperm instruction. Time zone for the Advance Toolchain is now automatically set to the system's time zone. New advance-toolchain-at5.0-selinux rpm,... [More]
By: Jeff Scheel.
Today's common question comes to us from many different sources. What prompts the write-up today is a nice description I recently saw in an email. Question: How hard is it to migrate applications to PowerLinux?
Answer: It depends on the characteristics of the application, but generally speaking migration is simple and straightforward. Post migration, the real work can be in tuning performance sensitive applications which typically contain more assembler and non-portable, platform-unique code, two attributes which... [More]
By: Bill Buros. If you've updated to the most recent RHEL 6.3, you might be seeing issues with CPU utilization being reported to the end users.
# uname -r 2.6.32-279.el6.ppc64 With the kernel here, if you run "top" on an idle system, it may report clearly inaccurate CPU utilization metrics, as in the idle system below. 66% kernel time on an idle system is not accurate.
# top top - 16:05:04 up 1 day, 39 min, 2 users, load average: 0.00, 0.00, 0.00 Tasks: 1167 total, 1 running, 1166 sleeping, 0 stopped, 0... [More]
By: Carlos Seo. The IBM Advance Toolchain for PowerLinux is a set of open source development tools and runtime libraries which allows users to take leading edge advantage of IBM's latest POWER hardware features on Linux. A new major release is now available, and it features: New base toolchain, based on gcc-4.7.2 and glibc-2.16 Supported on SLES 11 and RHEL 6 only (and their respective Service Packs and Updates) Optimized libraries for POWER7 only gcc now defaults to -mcpu=power6 -mtune=power7 Oprofile now supports non-root single... [More]
By: Jeff Scheel. As I've often mentioned in my blogs, I like to answer questions which I've been very asked frequently. Today's topic provides more details about our marketing slogan "Industry standard, Tuned to the task". We've worked so hard to eliminate the myth that PowerLinux is different (see my blog What does IBM mean when it says, "PowerLinux?" ) that we're now getting questions like:
Will my (x86) Linux application just run on PowerLinux? Can I use the same DVDs to install my PowerLinux or Power System server... [More]
By: Jessica Erber-Stark. They say a picture is worth a thousand words. If that's true, how many words is an information-packed video worth? The PowerLinux team has been hard at work, creating several videos to educate you on many aspects of the PowerLinux product. From product overviews to detailed technical demos, we can almost guarantee that you'll come away from these videos saying, "I didn't know I could do that with PowerLinux!" Check out the videos in the wiki at the PowerLinux videos page. We'd also love to hear your... [More]