I had mentioned the new malloc in DragonFly before, but Matthew Dillon has a nice explanation of its performance improvements and the relationship to the existing slab allocator.
Hasso Tepper, who has been working very hard on pkgsrc on DragonFly, has a few strange pkgsrc issues he’d like help on. Anyone have ideas? (Follow the thread to see what’s been done so far.)
Make Hasso Tepper’s life a bit easier and take heed of this list: Maintaining stuff in pkgsrc.
Edit: Meant to publish this a bit ago; missed it. Sorry!
Bring in money and then take it out again. It’s conceivable that Impi Linux would have fizzled on its own, being one of a zillion Linux distributions out there, but becoming a commercial product seems to put different, and tougher, contstrictions on any open source project.
The 2.2.1 release of DragonFly, rounding up changes since the release (I don’t have a list), should be tomorrow.
Mashing together to make one post:
These PC-BSD 7.1 vs. Kubuntu 9.04 Benchmarks are interesting but not that conclusive – different versions of gcc were used. (thanks J. Kanowitz) Here’s a different comparison of performance inside a VM from Ivan Voras.
Naoya Sugioka has kqemu working with the intended performance improvements; please test if you use qemu. (Johannes Hofmann has done some initial tests.)
Hasso Tepper has lang/gcc3 working in DragonFly 2.3, which means that we could potentially drop the version of gcc3 in contrib/ after the 2.4 release. He asks for other testers, please.
This would have the nice side effect of speeding up buildworld tremendously, as gcc3 and gcc4 get rebuilt each time.
- Thanks to Stathis Kamperis, it is now possible to build DragonFly 2.2 on a DragonFly 2.3 system, if for some reason you need to move to a system from before the recent libc changes.
- Matthew Dillon has replaced the existing BSD malloc with a port of the slab allocator, which makes malloc() faster, with minor benefits for a buildworld.
- Matthew Dillon also has a patch for people wanting to look for the elusive ‘file-missing-in-directory-listing’ Hammer bug. Caveat Emptor.
There’s a new @Play column focusing on more of the entries at the Seven Day RogueLike competition. I mention this because roguelikes have been around on Unix-ish systems forever, some of these may work on DragonFly, and because they are much more complex and interesting than I would have thought possible.
Of particular interest is Robert Luciani’s talk about M:N threading in DragonFly. Yes, that’s the same Robert Luciani who is participating in Summer of Code with DragonFly to profile kernel contention on multiprocessor systems.
There’s 5 slots for DragonFly in Summer of Code for 2009, and the students in those slots are listed below. We had some very good applications; more than we had room for and higher quality than last year. If you did not get in, please consider working independently.
Student: Alexander Hornung
Project: DevFS for DragonFly BSD
Mentor: joe talbott
Student: Dan Chis
Project: Support debugging of multi-threaded applications
Mentor: schubert simon
Student: robert luciani
Project: Profile kernel contention on MP systems
Mentor: Samuel Greear
Student: Jordan Gordeev
Project: Finish amd64 port of DragonFly
Mentor: Matthew Dillon
Student: efstathios kamperis
Project: C99/POSIX Conformance Audit
Mentor: hasso tepper