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. This release is 64-bit only, as with previous releases.
- Better support for asymmetric NUMA (Non-Uniform Memory Access) configurations. In particular, both the memory subsystem and the scheduler now understand the Threadripper 2990WX's architecture. 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).
- Incremental performance work. DragonFly as a whole is very SMP friendly. 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. massive use of shared locks on shared resources), and so forth.
- 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.
- DragonFly now ships with GCC 8.0, and runs as the default compiler. It is also now used for building dports.
- GCC 4.7.4 and GCC 5.4.1 are still installed. 4.7.4 is our backup compiler, and 5.4.1 is still there to ensure a smooth transition, but should generally not be used. buildworld builds all three by default to ensure maximum compatibility.
- Bug fixing has continued. HAMMER2 is recommended as the default root filesystem in non-clustered mode.
- Clustered support is not yet available
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