Dual core CPU's, but only 2 CPU's in-use?
ivoras at freebsd.org
Mon Feb 25 11:49:34 UTC 2008
> The only security advisory I could find was for 5.x and contained info
> on how to disable, not enable.
It's the same security issue, but it's handled differently on 5.x since
See machdep.hyperthreading_allowed sysctl.
Also, try benchmarking the system with and without hyperthreading (on
the real work the machine will be doing) since in some cases turning on
hyperthreading will result in globally lower performance.
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