4.8 hyperthreading changes

David Malone dwmalone at maths.tcd.ie
Sat Mar 29 01:42:18 PST 2003

On Sat, Mar 29, 2003 at 01:05:39PM +1100, Aristedes Maniatis wrote:
> makes it seem like this is a new 4.8 feature. Should I be concerned 
> about upgrading when 4.8 is released in order to obtain the benefits of 
> better use of these CPUs?

The BIOS in the machine in question must be setting up the logical
CPUs so that they look like physical CPUS - in this case FreeBSD
treats them exactly like physical CPUs. The hypertreading support
in 4.8 can enable logical CPUs even if the BIOS has not set them


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