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IBM Entrepreneur Week
IBM Entrepreneur Week is a one-of-a-kind opportunity for you to meet, interact, and connect with entrepreneurs, venture capitalists, industry leaders, and academics from around the world. If you're a startup or entrepreneur, join us onlne for our inaugural IBM Entrepreneur Week, 3-7 Feb 2014. There will be events taking place online and in locations worldwide, including face-to-face and virtual mentoring sessions, a women entrepreneur-focused event, and a LiveStream broadcast of the SmartCamp Global Finals in San Francisco.
Articles 15 Jan 2014
developerWorks Cell/B.E. resource center and multicore acceleration zone changes
The Cell/B.E. resource center and the multicore acceleration zone on developerWorks are no longer available.
Articles 12 Apr 2011
How to improve the performance of programs calling mathematical functions
This article introduces the IBM MASS high-performance mathematical libraries, and demonstrates how to benefit from them - without the need for source program changes - by using the auto-vectorization capability of the IBM XL C/C++ and XL Fortran compilers. After introducing the concept of auto-vectorization and the associated compiler options, a case study of a discrete Fourier transform program is offered as a real life example of auto-vectorization. Timing results demonstrate that speedups of up to 8.94 times are obtained by the compilers on the example program, via the automatic invocation of MASS by auto-vectorization.
Also available in: Chinese   Vietnamese  
Articles 13 Apr 2010
IBM PowerPC 405 Evaluation Kit with CoreConnect SystemC TLMs
The PowerPC Evaluation Kit is no longer available from developerWorks.
Articles 29 Jul 2009
Automating deployment and activation of virtual appliances for IBM AIX and Power Systems
Server virtualization enables you to rapidly provision new environments by using libraries of virtual image templates, or virtual appliances. Automated provisioning requires the management of operating system, network, and application-specific customization. This article provides a sample framework for automating virtual image deployment and activation on Power Systems, with a downloadable example that demonstrates how to provision a virtual appliance made up of IBM WebSphere Application Server V7.0 running on AIX V5.3.
Articles 29 Apr 2009
developerWorks Multicore acceleration zone changes
The Multicore acceleration zone on developerWorks is no longer publishing weekly content.
Articles 13 Mar 2009
Complex networking using Linux on Power blades
Blades are an excellent choice for many applications and services, especially in the telecommunications service provider industry. But the unique requirements of these provider networks often require configurations that are complex and need up-front focus and planning so all the stringent functional requirements are met. In this article, learn how to plan and set up the necessary network configurations for a POWER6 JS22 blade deployment.
Also available in: Russian  
Articles 05 Aug 2008
Cell/B.E. SDK: Code sample directory
In this article, you'll find tables indicating the locations of code samples that illustrate how to use the IBM SDK for Multicore Acceleration. This article will be updated with new code samples.
Articles 15 Jul 2008
IBM BladeCenter QS21 hardware performance glossary
Although there is extensive published data about the hardware performance features of a single Cell Broadband Engine(TM) (Cell/B.E.) processor (and about the performance of a multitude of applications ported to it), there is little on the specific hardware performance features of the IBM BladeCenter(R) QS21 using a coherent SMP node of two Cell/B.E processors as well as an elaborate IO subsystem. This glossary goes with the article "Evaluating IBM BladeCenter QS21 hardware performance." In that article, the authors close the performance gap by providing information about basic latencies, throughputs, and relative execution times for some key computational benchmark kernels, such as Linpack and SPEC2000. The article also delivers a basic architectural overview of the system. And, you can get tips on how to optimize application performance.
Articles 06 May 2008
The little broadband engine that could: Reviewing the newest little SDK that installs natively on PS3
Come along on a little train tour of the SDK for Multicore Acceleration 3.0 to see what's different for developers and how you can make good use of the SDK, including native installation on PS3, support for FC7 and RHEL 5.1, enhanced compilers, Fortran and Ada support, BLAS, ALF, and DaCS--oh my!
Articles 19 Feb 2008
The little broadband engine that could: Mailboxes and interrupts
Meet two more means of communication between the SPE and the PPE -- mailboxes and signal notification. Mailboxes are special-purpose registers, similar to the I/O registers used to communicate with peripheral devices on some systems, available on the SPEs and the PPE. Signal notification registers are registers which can be read or written to by the PPE, but which the SPE can only read.
Articles 03 Jul 2007
Tech tips: SPU vector intrinsics at your fingertips
Know these common C/C++ language extensions intrinsics and greatly simplify the arduous task of using the SPU's assembly language.
Articles 01 May 2007
Assembly language for Power Architecture, Part 4: Function calls and the PowerPC 64-bit ABI
The ABI, or Application Binary Interface, is the set of conventions that allow programs written in different languages or compiled by different compilers to call each other's functions. This article, the last in a four-part series, discusses the PowerPC ABI for 64-bit ELF (UNIX-like) systems and how to write and call functions using it. Knowing in detail how the 64-bit PowerPC ABI works will help you write 64-bit programs for the POWER5 and other PowerPC-based processors more effectively, whether you program in assembly language or not. There is also a 32-bit ABI that is not covered in this article.
Also available in: Chinese   Japanese  
Articles 28 Feb 2007
Assembly language for Power Architecture, Part 3: Programming with the PowerPC branch processor
The last two articles discussed the outline of how programs on the POWER5 processor work using the 64-bit PowerPC instruction set, how the PowerPC instruction set addresses memory, and how to do position-independent code. This article focuses on the very powerful condition and branch instructions available in the PowerPC instruction set.
Also available in: Chinese   Russian   Japanese  
Articles 17 Jan 2007
Assembly language for Power Architecture, Part 2: The art of loading and storing on PowerPC
The previous article in this series introduced assembly language programming using the 64-bit PowerPC instruction set on POWER5 and other processors that use these instructions. This article drills down and discusses the specifics of 64-bit PowerPC assembly language programming on Linux and UNIX-like operating systems, focusing on data access methods and position-independent code.
Also available in: Russian  
Articles 29 Nov 2006
The Heath Robinson Rube Goldberg Computer, Part 1: Implementing a computer using a mixture of technologies from relays to fluidic logic
Imagine a computer formed from a mixture of technologies ranging from relays to fluidic logic. Now imagine being able to create a single piece of such a computer (perhaps as small as a single word of memory) in the technology of your choice, and then using the Internet to run your masterpiece in conjunction with other portions of the system created by contributors located around the world! Author Clive (Max) Maxfield explains the creation of just such a computing engine and how you can be involved.
Articles 03 Oct 2006
Assembly language for Power Architecture, Part 1: Programming concepts and beginning PowerPC instructions
The POWER5 processor is a 64-bit workhorse used in a variety of settings. Starting with this introduction to assembly language concepts and the PowerPC instruction set, this series of articles introduces assembly language in general and specifically assembly language programming for the POWER5.
Also available in: Chinese   Russian  
Articles 03 Oct 2006
Standards and specs: Of RoHS and rushed standards
When the ex cathedra RoHS Directive came down, it was missing a little crucial piece of information -- how manufacturers, distributors, and purchasers of parts could communicate to each other the RoHS status of every part.
Articles 15 Aug 2006
Standards and specs: The Interchange File Format (IFF)
The IFF file format had many of the features still sought today in modern file formats. This month's Standards and specs looks at the IFF file format and the lessons it has for modern file formats, such as XML.
Articles 13 Jun 2006
SoC drawer: SoC design for hardware acceleration, Part 1
System-on-chip (SoC) designs offer the opportunity to migrate functionality initially implemented in software and firmware into hardware acceleration engines and state machines. Reconfigurable SoCs based on processors in FPGA fabric, such as the PowerPC 405 in the Xilinx Virtex-4, provide a platform for rapid migration of functionality from PowerPC software and firmware to the FPGA logic. Configurable application-specific integrated circuit (ASIC) SoCs can be optimized similarly over product revisions as SoC ASIC roadmap configurations are defined. This article examines methods for software design, specification, and implementation that will simplify future efforts to offload software functionality to hardware. Basic video and image processing algorithms provide working example algorithms for this article and the next.
Articles 06 Jun 2006
Standards and specs: Lies, statistics, and benchmarks
Benchmarks can be an excellent tool for predicting performance and estimating requirements. They can also be misleading, possibly catastrophically so. Benchmark standardization helps distinguish between a good estimate and a meaningless number.
Articles 23 May 2006
Cell Broadband Engine processor DMA engines, Part 2: From an SPE point of view
The Cell Broadband Engine (Cell BE) architecture provides on-chip DMA capabilities between the PPE and the SPEs. Meet the SPE interface to the DMA capabilities of the processor, from channel allocation to communication.
Articles 02 May 2006
The Cell Broadband Engine processor security architecture
The unrelenting evolution toward an even more open and connected computing infrastructure requires robust security to thrive. Learn how the Cell Broadband Engine processor's security architecture is uniquely suited for the challenges of this digital future.
Articles 24 Apr 2006
SPU pipeline examination in the IBM Full-System Simulator for the Cell Broadband Engine processor
Find out the exact cycle where the SPE stalls, or identify a poor choice of branch predictions, using pipeline tracing in the Cell Broadband Engine (Cell BE) simulator.
Articles 17 Apr 2006
SoC drawer: Detecting and correcting I/O and memory errors
SoCs (systems-on-chips) are often deployed in communications, storage, network processing, and mission-critical embedded data processing systems. A reliable SoC-based system must mitigate and control environmentally induced errors in stored or transported data. It is impossible to fully prevent data loss, but engineering due diligence is required to ensure that systems are as safe as practically possible given current data coding methods for error detection and correction. This article examines methods to minimize potential data corruption and to maximize system safety when uncorrectable errors do occur.
Articles 21 Mar 2006
Everything you ever wanted to know about C types, Part 3: Implementation details
The C type system has changed a lot since the 1970s. Part 3 in the "Everything you ever wanted to know about C types" series reviews some of the quirks that particular implementations have had and discusses the changes the C99 language revision introduced.
Articles 19 Mar 2006
Migrating from x86 to PowerPC, Part 9: Sensors, sensors, sensors!
From schematics to code, get a leg up on building your own robot submarine. Building on previous successes, Lewin Edwards shows how to add more sensors to your submarine, looking at the design requirements of different sensors and ways of sanity checking the results they provide.
Articles 14 Mar 2006
Standards and specs: Not by UNIX alone
Technology professionals have loosely used the term "UNIX" since the first person had to explain the difference between the Berkeley and AT&T flavors, so it's not surprising to find as many UNIX standards as there are versions of the operating system. Peter Seebach wades through the wellspring of UNIX standards and sorts them out for you, concluding that the rumors of the death of UNIX are (as usual) greatly exaggerated.
Articles 08 Mar 2006
Everything you ever wanted to know about C types, Part 1: What's in a type?
This article, first in a four-part series, introduces the basics of the C type system, with an overview of what it means to talk about type and a discussion of the basic types (integer and floating point) in some detail.
Articles 03 Jan 2006
SoC drawer: SoC concurrent development
A system-on-a-chip (SoC) can be more complex in terms of hardware-software interfacing than many earlier embedded systems because an SoC often includes multiple processor cores and numerous I/ O interfaces. The process of integrating and testing the firmware-hardware interface can begin early, but without good management and testing, the mutability of firmware and early stages of hardware design simulation can lead to disastrous setbacks for a project. This article teaches system designers about tools and methods to minimize project churn.
Articles 20 Dec 2005
Just like being there: Papers from the Fall Processor Forum 2005: Introducing the IBM PowerPC 970MP
This Fall Processor Forum paper explores the PowerPC 970MP, a 90nm-process, dual-core version of the PowerPC 970FX with remarkable, dynamic power-saving features. It's like no 64-bit dual-core PowerPC processor you've ever met before. Read why.
Articles 14 Dec 2005
Cell Broadband Engine processor DMA engines, Part 1: The little engines that move data
A single Cell Broadband Engine (Cell BE) processor consists of one PowerPC core and eight SPEs each having their own DMA engine. The DMA engines are a key component of the overall Cell Broadband Engine Architecture (CBEA) as they move data between SPEs and the PowerPC core. Any operating system or application wishing to utilize the SPE depends on the DMA engines to manage work flow on behalf of the SPEs.
Articles 06 Dec 2005
Meet the experts: David Krolak on the Cell Broadband Engine EIB bus
Understanding the Element Interconnect Bus (EIB) is an essential component to maximizing performance on the Cell Broadband Engine (Cell BE) Architecture. The lead designer and EIB project manager sit down for an hour with developerWorks' Meet The Experts to discuss ring versus interconnect buses, data arbiters, and bus protocols.
Articles 06 Dec 2005
Cell Broadband Engine Architecture and its first implementation
Explore the first implementation of the Cell Broadband Engine (Cell BE) Architecture, developed jointly by Sony, Toshiba, and IBM, and get an up-close look at its performance figures and characteristics.
Articles 29 Nov 2005
PowerPC Architecture Book
This three-volume set defines the instruction and registers used by application programs, the storage models, privileged facilities, and related instructions.
Articles 16 Nov 2005
PowerPC Architecture Book, Version 2.02
This 3 volume set, Version 2.02, defines the instruction and registers used by application programs, the storage models, privileged facilities, and related instructions for the IBM POWER5 processor family. Verson 2.01 describes POWER4 and POWER4+ processors.
Articles 16 Nov 2005
Debugging simulated hardware on Linux, Part 1: Device driver debugging
This two-part series is geared toward easing device driver development. This first part illustrates proven methods you can use to test the complete code flow of a device driver during the design, development, and debugging stages.
Articles 02 Nov 2005
Standards and specs: Early adopters
Whether a standard will succeed and be widely adopted is ambiguous at first, regardless of who endorses it -- a major player or a fringe element. So why would people put all their eggs in a standards basket when that basket might not exist tomorrow? Join Peter Seebach as he shows the potential advantages of adopting a standard before it becomes one. (Of course, he hasn't forgotten the potential disadvantages, too.)
Articles 18 Oct 2005
Meet the experts: On open source firmware development
Slimline Open Firmware (SLOF) provides a largely machine-independent BIOS, illustrating what is needed to initialize and boot Linux, a hypervisor, or any other operating system or virtualization layer on PowerPC-based machines based on the de-facto industry Open Firmware boot standard. Join three experts as they discuss the decisions in developing SLOF and where they'd use it and provide a picture of the boot-up process under SLOF.
Articles 11 Oct 2005
Standards and specs: The ATX case and power supply
The ATX standard allows power supplies and cases to be commodity parts, dramatically reducing the cost of computer design. Lessons learned from the success of this standard show why standardizing parts is important. The BTX standard builds on this, and the blade.org standards work should do likewise.
Articles 13 Sep 2005
Migrating from x86 to PowerPC, Part 7: Basic design of the vehicle control module
Get an overview of some design decisions involved in configuring a secondary processor to handle maintenance tasks on your robot submarine, and see some of the setup code allowing the subordinate processor to interact with the main system.
Articles 06 Sep 2005
Five minutes with: Stanley Kwong on the first Power Architecture-related technical briefings
This question and answer session features Stanley Kwong, the person in charge of worldwide technical briefings for IBM. Stan handles developerWorks briefings and is about to orchestrate the first-ever briefing on the Power Architecture-related dW event in the People's Republic of China. Hear him as he talks about the briefing and comments on technology development in one of the world's most rapidly developing economies.
Articles 02 Sep 2005
Cell Broadband Engine Architecture from 20,000 feet
The Cell Broadband Engine Architecture (CBEA, or, informally, "Cell") defines a new processor structure based upon the 64-bit Power Architecture technology, but with unique features directed toward distributed processing and media-rich applications. The Cell architecture defines a single-chip multiprocessor consisting of one or more Power Processor Elements (PPEs) and multiple high-performance SIMD Synergistic Processor Elements (SPEs). While each SPE is an independent processor running its own application programs, a shared, coherent memory and a rich set of DMA commands provide for seamless and efficient communications between all Cell processing elements. This article provides a concise view inside the Cell's architecture.
Articles 24 Aug 2005
Five minutes with: Dan Greenberg on plans for Cell
Power Everywhere systems offerings program director Dan Greenberg talks about where the Cell Broadband Engine Architecture is going, how IBM intends to encourage collaboration with developers in its deployment, and what collaboration services are already available for Cell development. Plus, he introduces five new detailed developer resources -- an overview of the architecture, the instruction set architecture for the SPU, and three language datasheets.
Articles 24 Aug 2005
Meet the experts: Arnd Bergmann on the Cell BE processor
This question and answer article features Arnd Bergmann of IBM: a kernel hacker with the IBM Linux Technology Center, the Linux on Cell Broadband Engine (Cell BE) processor kernel maintainer, and author of the spufs file system.
Articles 25 Jun 2005
Standards and specs: Naturally occurring standards
What makes a standard viable without the formal blessing of a standards organization? Should you use such informal standards, or ignore them? Learn more about de facto standards in this month's Standards and specs.
Articles 12 Apr 2005
MySQL for Linux on POWER, Part 1: Introduction to creating a database
Learn about the availability of MySQL Database Server for Linux(R) running on IBM(R) POWER(TM) and PowerPC(R) processor-based servers (collectively referred to as Linux on POWER). As a brief guide for application developers using MySQL on Linux on POWER, this paper is intended for MySQL developers and database administrators who are familiar with their system environment, networks, media devices, and disk resources. In Part 2 of this article, read about developing applications for MySQL using PHP, C/C++, Java, Perl, and Python.
Articles 05 Apr 2005
Unrolling AltiVec, Part 2: Optimize code for SIMD processing
In this second article of a three-part series, Peter Seebach looks closer at AltiVec, the PowerPC SIMD unit. He explains further how you can effectively use AltiVec, discussing the choice between C and assembly, and shows some of the issues you'll face when trying to get the best performance out of an AltiVec processor.
Articles 16 Mar 2005
Unrolling AltiVec, Part 1: Introducing the PowerPC SIMD unit
AltiVec? Velocity Engine? VMX? If you've only been casually following PowerPC development, you might be confused by the various guises of this vector processing SIMD technology. In this first installment of a three-part series, Peter Seebach gives you the basics on what AltiVec is, what it does -- and how it stacks up against its competition.
Articles 01 Mar 2005
Power Architecture author FAQ
If you're interested enough in Power Architecture technology to read articles on our content area, then you just might have some knowledge to share with your fellow pros. Find out how you can submit your ideas to developerWorks.
Articles 18 Feb 2005
Data alignment: Straighten up and fly right
Data alignment is an important issue for all programmers who directly use memory. Data alignment affects how well your software performs, and even if your software runs at all. As this article illustrates, understanding the nature of alignment can also explain some of the "weird" behaviors of some processors.
Articles 08 Feb 2005
Migrating from x86 to PowerPC, Part 2: Anatomy of the Linux boot process
This installment of "Migrating from x86 to PowerPC" discusses detailed similarities and differences between booting Linux on an x86-based platform (typically a PC-compatible SBC) and a custom embedded platform based around PowerPC, ARM, and others. It discusses suggested hardware and software designs and highlights the tradeoffs of each. It also describes important design pitfalls and best practices.
Articles 08 Feb 2005
Standards and specs: A house divided
What happens when two coalitions within a standards committee come into conflict, and the dispute doesn't get resolved quickly? The ultrawideband technology standardization issue shows you.
Articles 25 Jan 2005
Emulation and cross-development for PowerPC
This article introduces PowerPC emulation and cross-compiling for developers without access to real hardware. It is intended for developers familiar with computer architecture who own an x86-based workstation but are interested in experimenting with PowerPC.
Articles 18 Jan 2005
Meet the experts: Regina Darmoni
This question and answer article features the IBM Program Director of PowerPC licensing, Regina Darmoni. Regina has led the PowerPC licensing effort from the concept stage to the present and talks about general license terms and what's available -- and what it's like to be the little guy.
Articles 11 Jan 2005
This is a test article. Please ignore.
This is a test article. Please ignore.
Articles 11 Jan 2005
From the stacks: Programming the cache on the PowerPC 750GX/FX
Many programs can obtain acceptable performance by simply letting the processor manage its own caching -- however, programs with special requirements (for instance, bootware) may obtain dramatically improved performance by manipulating the cache directly. This excerpt from an IBM Microelectronics Technical Library Application Note discusses cache basics for the PowerPC 750GX and 750FX.
Articles 04 Jan 2005
The year in Power Architecture technology: The year in microprocessors
From spintronics to clockless CPUs, 2004 was a year of process and research in the microprocessor industry. This article offers a month-by-month look at the highlights of the 2004 microprocessor timeline.
Articles 22 Dec 2004
Great moments in microprocessor history
The evolution of the modern microprocessor is one of many surprising twists and turns. Who invented the first micro? Who had the first 32-bit single-chip design? You might be surprised at the answers. This article shows the defining decisions that brought the contemporary microprocessor to its present-day configuration.
Articles 22 Dec 2004
Standards and specs, Special Edition: Introducing Power.org
Major electronics companies have come together to form a new standards body focused on Power Architecture technology. This organization will create and promote a family of standards, reference designs, and more. This month's Standards and specs looks at how the new standards body will work, and what it will do.
Articles 15 Dec 2004
PowerPC development from the bargain basement
The Kuro Box promises something fairly interesting: a usable single-board PowerPC computer, for only US$160 -- when other PowerPC development boards often cost ten times as much. Peter Seebach guides you through setup and install in this developerWorks hardware howto.
Articles 14 Dec 2004
Meet the experts: John McCalpin
This question and answer article features IBM Senior Technical Staff Member John McCalpin on his work on the POWER5 and in high performance computing; on the Hypervisor and the size of POWER5 chips; on 128-bit computing -- and even on why he became a computer scientist instead of an entomologist.
Articles 23 Nov 2004
Save your code from meltdown using PowerPC atomic instructions
Something as simple as incrementing an integer can fail in a concurrent environment. This article illustrates the failure scenario and introduces the PowerPC's coping mechanism: atomic instructions. Learn how to use these assembly-level instructions to update memory correctly, even in the face of concurrency.
Articles 02 Nov 2004
Standards and specs: Open Firmware -- the bridge between power-up and OS
Open Firmware provides a reasonably standardized way for computers to find hardware, configure it, and boot an operating system. In this month's Standards and specs, author Peter Seebach looks at the Open Firmware spec, traces its history as a standard, examines how it works and some of its components, and discusses the benefits it offers.
Articles 26 Oct 2004
From the stacks: Making the transition to 64 bits
Developers porting applications to the 64-bit computing mode of the 970FX processor may face a number of issues; this excerpt from a longer Technical Library article covers some of the issues faced when porting existing 32-bit code to the new computing model -- or when embarking on new 64-bit development.
Articles 19 Oct 2004
From the stacks: PowerPC 750FX/GX design and debug tips, Part 2
In the second and final installment of this series, IBM Senior Engineer Dale Elson offers comprehensive tips on troubleshooting and debugging your PowerPC 750FX/GX systems. Part 1 focused on design best practices. This article also covers system qualification and lists the information to communicate when you need debugging help.
Articles 12 Oct 2004
From the stacks: PowerPC 750FX/GX design and debug tips, Part 1
Soak up some of the wisdom that the IBM PowerPC Applications Engineering team has accumulated from dozens of years of designing, troubleshooting, and debugging PowerPC systems. In the first of a two-part series, IBM Senior Engineer Dale Elson presents tips and best practices for designing applications for PowerPC 750FX/GX processors -- but you can extrapolate much of his advice to other systems as well.
Articles 06 Oct 2004
Standards and specs: Standards
Introducing a regular column on the specifications and standards affecting people involved in nearly every aspect of Power Architecture technology, Peter Seebach looks at the different kinds of standards in the industry today, as well as how to find out about and make the most effective use of standards in your own work.
Articles 27 Sep 2004

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