sysctl hw.cpu_mwait_{idle,spin} is deprecated on x86_64

Sepherosa Ziehau sepherosa at
Thu Feb 6 04:57:25 PST 2014

Hi all,

hw.cpu_mwait_{idle,spin} sysctls are now read-only on x86_64.

machdep.mwait.CX.idle and machdep.mwait.CX.spin should be used instead.

The possible values for the above two sysctls are listed in the output
of sysctl machdep.mwait.CX.supported.  For machdep.mwait.CX.idle,
"AUTO" and "AUTODEEP" may also be configured.

Best Regards,

Tomorrow Will Never Die

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