doc's inaccuracy? about machdep.hlt_logical_cpus

Andriy Tkachuk ant at emict.com
Thu Dec 16 03:11:27 PST 2004


Hi folks.

ant# uname -r
5.3-STABLE

man smp
...
     FreeBSD supports hyperthreading on Intel CPU's on the i386 platform.
     Since using logical CPUs can cause performance penalties under certain
     loads, the logical CPUs can be disabled by setting the
     machdep.hlt_logical_cpus sysctl to one.
     ^^^^^^^^^^^^^^^^^^^^^^^^

ant# sysctl -a | grep machdep.hlt
machdep.hlt_cpus: 0

is this the one that is mentioned in smp(4) ?


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