Nearly all operations are able to run concurrently on any number of cpus. A combination of intentional simplification of certain classes of locks to make more expansive subsystems less prone to deadlocks, and the rewriting of nearly all the original codebase using algorithms designed specifically with SMP in mind, has resulted in an extremely stable, high-performance kernel that is capable of efficiently using all cpu, memory, and I/O resources thrown at it.ĭragonFlyBSD has virtually no bottlenecks or lock contention in-kernel. Much of the work done since the project began has been in this area. The kernel uses several synchronization and locking mechanisms for SMP. Virtual kernels provide the ability to run a full-blown kernel as a user process for the purpose of managing resources or for accelerated kernel development and debugging.
The most prominent one is HAMMER, our modern high performance filesystem with built-in mirroring and historic access functionality. DragonFly provides an opportunity for the BSD base to grow in an entirely different direction from the one taken in the FreeBSD, NetBSD, and OpenBSD series.ĭragonFly includes many useful features that differentiate it from other operating systems in the same class. It is based on the same UNIX ideals and APIs and shares ancestor code with other BSD operating systems. DragonFlyBSD #236 (broken since this build)ĭragonFly belongs to the same class of operating systems as other BSD-derived systems and Linux.See recent news from the DragonFly Digest
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