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Does FreeBSD support Symmetric Multiprocessing (SMP)?

April 26, 2017FreeBSD Multiprocessing SMP support Symmetric

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Does FreeBSD support Symmetric Multiprocessing (SMP)?

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Yes. SMP was enabled by default in the GENERIC kernel as of FreeBSD 5.2. The intention was also to enable it by default for the FreeBSD 5.3 release, but problems running the SMP kernel on certain UP machines led to the decision to disable it until those problems can be addressed. This is a priority for FreeBSD 5.4. In FreeBSD 4.X, SMP is not enabled in the default kernel, so you must recompile your kernel to enable SMP. Take a look at /sys/i386/conf/LINT to learn which options to put in your kernel config file.

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