Major updates to dports brings us to within a week or two of FreeBSD’s ports as of this writing, in particular major updates to chromium, and making the whole mess work with gcc-8.massive use of shared locks on shared resources), and so forth. The type of performance work we are doing now mostly revolves around improving fairness for shared-vs-exclusive lock clashes, reducing cache ping-ponging due to non-contending SMP locks (i.e. DragonFly as a whole is very SMP friendly. The scheduler will prioritize CPU nodes with direct-attached memory and the memory subsystem will normalize memory queues for CPU nodes without direct-attached memory (which improves cache locality on those CPUs). In particular, both the memory subsystem and the scheduler now understand the Threadripper 2990WX’s architecture.

Much better support for asymmetric NUMA (Non-Uniform Memory Access) configurations.The details of all commits between the 5.2 and 5.4 branches are available in the associated commit messages for 5.4.0rc and 5.4.0. This release is 64-bit only, as with previous releases. Headlines DragonflyBSD 5.4 released DragonFly version 5.4 brings a new system compiler in GCC 8, improved NUMA support, a large of number network and virtual machine driver updates, and updates to video support. DragonflyBSD 5.4 has been released, down the Gopher hole with OpenBSD, OpenBSD in stereo with VFIO, BSD/OS the best candidate for legally tested open source Unix, OpenBGPD adds diversity to the routing server landscape, and more.

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