Here’s a link to the site describing the work being done to port the Charm++ API to Cell at UIUC, and some notes on that work and the NAMD port. They also have a set of PostScript slides describing the work being done on it (I’ve converted it to PDF below).
Eugen Leitl has just posted on the Beowulf list a message with a link to a draft of a paper by Alfredo Buttari, Piotr Luszczek, Jakub Kurzak, Jack Dongarra and George Bosilca called A Rough Guide to Scientific Computing On the Playstation 3. It’s a 74 page PDF looking at the possibilities and problems with using the PS3 for scientific computing (there is already a PS3 Linux cluster at NCSU).
The introduction to the paper lets you know that this isn’t going to be easy..
As exciting as it may sound, using the PS3 for scientiﬁc computing is a bumpy ride. Parallel programming models for multi-core processors are in their infancy, and standardized APIs are not even on the horizon. As a result, presently, only hand-written code fully exploits the hardware capabilities of the CELL processor. Ultimately, the suitability of the PS3 platform for scientiﬁc computing is most heavily impaired by the devastating disproportion between the processing power of the processor and the crippling slowness of the interconnect, explained in detail in section 9.1. Nevertheless, the CELL processor is a revolutionary chip, delivering ground-breaking performance and now available in an affordable package. We hope that this rough guide will make the ride slightly less bumpy.
Of course, it’s unlikely you’re going to see the PS3 being used in production clusters anyway, so the interconnect shouldn’t be such a problem there.. 🙂
The paper covers the hardware, Linux support and how to get it onto a PS3, programming methods and models, MPI, performance, etc. The paper isn’t complete as I write, but it is still a very interesting read. HPC folks will certainly want to read section 9.1 “Limitations of the PS 3 for Scientiﬁc Computing”, especially the part that says:
Double precision performance. Peak performance of double precision ﬂoating point arithmetic is a factor of 14 below the peak performance of single precision. Computations which demand full precision accuracy will see a peak performance of only 14 Gﬂop/s, unless mixed-precision approaches can be applied.
Russell Coker, SELinux developer, Bonnie++ maintainer and fellow LUV person has now switched from Blogger to his own WordPress installation, which makes leaving comments a hell of a lot easier! 🙂
He’s also now got a blog on “random things that are large or of limited interest“, though why that isn’t just a category on his main site (and using WordPress’s handy “more” marker to stop the whole thing showing up on the front page) I’m not sure.
Anyway, welcome to WordPress Russell!
For anyone who doubts that graduates in China are going to be more than a match for the rest of the world, go and read this BBC news article comparing a maths question set to first year chemistry students in the UK with a maths question that is set to students wishing to enter university in China.
The Royal Society of Chemistry in the UK is running a competition offering a GBP500 prize to a winner who can correctly answer the question from China. This is because of their concerns about the poor level of mathematics that Chemistry students in the UK have:
Increasingly, universities are mounting remedial sessions for incoming science undergraduates because their maths skills are so limited, with many having stopped formal lessons in mathematics two years earlier at the GCSE level.
The Western World has been fretting about SARS and Avian Influenza for some time now, but all the while there’s been another bug that we thought we had previously conquered sitting in the wings evolving drug resistance, and it could be far deadlier.
A refreshingly down to earth look at the current hype and worry over “Web 2.0”. (( I still want to know what happened to Web 1.0, I thought it was still in beta ))
Watch the cat..
- Grab the nearest book.
- Open the book to page 23.
- Find the fifth sentence.
- Post the text of the next three sentences in your journal along with these instructions.
- Don’t dig for your favourite book, the cool book, or the intellectual one: pick the CLOSEST.
- Tag five other people to do the same.
Here we go..
The mainboard connector provides a standard PS/2 keyboard connector for attaching a PS/2 keyboard. You can plug a PS/2 keyboard directly into this connector. PS/2 Keyboard (6-pin Female)
That’s from the VIA EPIA Mini-ITX (“Dream Catalyst”) mainboard manual that happened to be sitting in front of me. Extra boring points for me I think!
People can work out themselves if they wish to be infected by this meme.. 🙂