Yesterday, I had the honor of being the opponent at the PhD defense of Simon Kågström at Blekinge Tekniska Högskola (BTH, Blekinge University of Technology in English). His PhD thesis deals mainly with the multiprocessor port of an industrial in-house operating system, and a secondary theme was the design of the Cibyl C-programs-to-JVM translator. All of his papers are very well-written and a joy to read, and the engineering work behind it is very solid.
The most important data in the PhD thesis is really just how much work it is to do an SMP port of an OS kernel. And how hard it is to get performance up to good levels even with several years of work. Really emphasizes the point that hard work and perseverance and just lots of calendar time is what it takes to create a good SMP OS. That’s why Solaris and AIX are still years ahead of Linux in this respect — you just need to hit the snags, fix them, retest, and hit the next snag. It takes time to polish, basically.
So, if you have any interest in multiprocessor operating systems, Simon’s work is well-worth a read. Also check out his blog at http://simonkagstrom.livejournal.com/. And by the way, he did pass.
This is just a repeat post of http://jakob.engbloms.se/archives/75 . I will present at the ESC Silicon Valley, next Thursday, at 08.30 in the morning. On how to use simulation and virtualization to better develop embedded software.
As a side note, a few years ago, I presented on efficient C programming for IAR Systems, guess that would have made Jack Ganssle happy: he complained about the lack of resource-constrained C programming skills in today’s university graduates in a column at Embedded.com recently. Apparently, the major market-driven education companies in the US have also dropped plain C programming from the course rosters… sounds like an opportunity or void to be filled by the embedded companies. Buy a C compiler, get a free efficient programming course.
The Multicore Expo US 2008 is taking place next week (April 1-3) in Santa Clara, CA. I was originally slated to talk there, but since I am going to the Embedded Systems Conference a few weeks later it was too much travel in too short a time frame to do. I happy that Ross Dickson, a senior technology specialist at Virtutech could take my place. He will do just as good a job as I would, and he also has his own session to present at the Expo.
Our talk will be on how approximate you can be in simulating multicore computers, and still get useful results out from the software running on the simulator. It is something that we at Virtutech have spent a lot of time working on, and we want to bring our results to a wider community. Really exciting to present, and it is a pity that I could not be there myself.
I attended a DATE 2008 open exhibition panel discussion on multicore programming, organized by Gary Smith EDA. The panel was a few people short, and ended up with just Simon Davidmann of Imperas, Grant Martin of Tensilica, and Rudy Lauwereins of IMEC. A user representative from Ericsson was supposed to have been there but he never arrived. Overall, the panel was geared towards data-plane processing-type thinking, and a bit short on internal dissonance.
Continue reading “DATE 2008 Panel on Multicore Programming”
I am scheduled to talk at the ESC SV 2008 in the technical program. In 2006 and 2007 my topic was Multicore Debugging, but this year I have changed to Using Simulation Tools for Embedded Software Development. The date is April 17, the time 8.30 to 10.00, and the place the San Jose Convention Center.
See you there!