A real-time, lock-free, multi-CPU flight recorder

Debugging complex, real-time, multi-CPU programs like HPVM, Tao3D or the software in the DxO ONE can be a real challenge. You need detailed information about what's going on, but at the same time, adding instrumentation, e.g. a big bunch of ad-hoc printf statements, can change the behavior of the program sufficiently to make the problem you are chasing … Continue reading A real-time, lock-free, multi-CPU flight recorder

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LeMag IT article about HPVM

Sorry for my non-French readers, here is an article from LeMag IT about HPVM, who several colleagues forwarded me. This is also probably the first time someone links to the Taodyne web site. Welcome to the readers of LeMag IT who decided to follow the link to my blog...

Stability and innovation

Two days ago, I attended a conference in Paris on the future of virtualization in mission-critical environments. There was a presentation from Intel about the roadmap for Itanium and virtualization. Stability vs. Innovation Two things in this presentation reminded me of what Martin Fink calls the Unix paradox: Intel pointed out that Itanium is mission-critical, … Continue reading Stability and innovation

Virtual machines and scalability

I already pointed out many problems regarding the comparison of virtual machines recently posted by IBM. But there is one topic which I thought required a separate post, namely scalability. What is scalability? Simply put, scalability is the ability to take advantage of having more CPUs, more memory, more disk, more bandwidth. If I put … Continue reading Virtual machines and scalability

IBM’s comparison of virtual machines…

IBM just posted a comparison of virtual machines that I find annoyingly flawed. Fortunately, discussion on OSnews showed that technical people don't buy this kind of "data". Still, I thought that there was some value in pointing out some of the problems with IBM's paper. nPartitions are tougher than logical partitions What HP calls 'nPartitions' … Continue reading IBM’s comparison of virtual machines…

Oh, the joy of not being remote…

Following my CGO talk, I went to visit my colleagues in Nashua, New-Hampshire. Nashua ZKO site shutting down The so-called ZKO building is a historical landmark in the history of DEC. For the old-timers in computer science, @zko.dec.com was a pretty healthy thing to have in your e-mail address... Its walls are layered with pictures … Continue reading Oh, the joy of not being remote…