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  • the elusive open source business model

    In some cases, dominant technology companies have used open-source projects as pawns. Google, for example, has needled Microsoft by providing financial support to the nonprofit Mozilla Foundation, which oversees of the development of Firefox. I.B.M. has been a major backer of Linux, helping to raise it as a competitor to Microsoft’s Windows and other proprietary…

    November 30, 2009
  • multicore and multiprocessor performance

    Here’s two  interesting tables Percentage of lock acquisitions for global TCP/IP locks that do not succeed immediately. OS Type 6 conns 192 conns 16384 conns MsgP 89 100 100 ConnP-L(4) 60 56 52 ConnP-L(8) 51 30 26 ConnP-L(16) 49 18 14 ConnP-L(32) 41 10 7 ConnP-L(64) 37 6 4 ConnP-L(128) 33 5 2 L2 Data…

    November 26, 2009
  • The ridiculous GPL-only tagging of Linux

    Imagine that you release software under a license that is primarily concerned with making sure that modifiable source code is available to all and that no restrictions should ever be placed on derived works. Now imagine that someone takes a huge body of code like this and starts marking interfaces as limited to specific uses…

    November 25, 2009
  • 10th anniversary of the RTLinux Manifesto paper

    The RTLinux* Manifesto was published a little over 10 years ago at the 5th Linux Expo in Raleigh North Carolina which was really the first one with a bunch of suits wandering around.  As a kind of celebration/experiment , I’m publishing an annotated version. Here is a related discussion . * RTLnux is a  trademark…

    November 25, 2009
  • Recursive transducers and products – pre-submit version

    Recursive transducers.

    November 22, 2009
  • Software Design and time synchronization

    I have a blog post up at fsmlabs.com about our TimeKeeper software for time synchronization. TimeKeeper is currently aimed at financial trading markets, but we also hope to market it to electric power  distribution and transmission engineers who have a similar need for precise time synchronization within substations and for instrumentation. There are also applications…

    November 14, 2009
  • More petty

    The ALMA team has released ACS 8.0 on Red Hat 4.4, downgrading the Linux version from the foreseen 5.2 version. This choice, with the consequent back-porting of the code to the older OS version, had to be taken because of major problems encountered by the Control and Correlator teams in porting RTAI real time code…

    November 13, 2009
  • Montavista thoughts

    Bill “Linux Pundit” Weinberg explains: Business Model and Execution:  Many MontaVista watchers have argued that the company’s business model was essentially flawed. […]  Such a model based on building with and for open source can devolve into less attractive high-overhead packaged service business in the face of a rising value line. […] The model did…

    November 12, 2009
  • Montavista f-f-fades away

    MOUNTAIN VIEW, CA–(Marketwire – 11/10/09) – Cavium Networks (NASDAQ:CAVM – News), a leading provider of highly integrated semiconductor products that enable intelligent processing for networking, wireless, storage and video applications, today announced that it is has signed a definitive agreement to acquire MontaVista Software for $50 million, comprised of approximately $16 million in cash and…

    November 10, 2009
  • Parallelism and multicore

    The goal of modern processor chip design has changed from optimizing various speed/price/heat tradeoffs for applications to finding excuses for dumping more transistors into the device.  Heard an interesting talk from Krisztián Flautner of ARM at the ACISC conference and I have to admit that it’s not entirely the fault of the chip designers –…

    November 1, 2009
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keeping simple

    • Groundbreaking treatise on state machines, paxos, specification
    • The RTLinux patent 5,995,745
    • Notes on Security and Common Criteria
    • Download code

keeping simple

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