[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]
Disabling hyperthreading on Intel CPUs
Dos anyone know what happned to the machdep.hyperthreading_allowed
tunable? It was definitely there in (I think) 5.x but in 8.1 it's not:
andy@dell380:~ $ sysctl machdep.hyperthreading_allowed=0
sysctl: unknown oid 'machdep.hyperthreading_allowed'
There are some new CPU sysctls in 8.x but they seem to disable cores
rather than hyperthreading, which is enabled by default in the kernel. I
would like to be able to turn off hyperthreading at runtime on a large
number of HP PCs that are fitted with single quad-core CPUs without
touching the BIO settings.
Main Index |
Thread Index |