From owner-freebsd-hardware@FreeBSD.ORG  Mon Nov  3 22:31:46 2003
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Date: Mon, 03 Nov 2003 22:31:42 -0800
From: Marc <bsdhw@tear.com>
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Subject: Hyperthreading
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I am setting up a 5.1 system with a single
P4 3 GHz HT CPU.

Do I need an SMP kernel to take advantage of
hyper threading?

>From dmesg:
CPU: Intel(R) Pentium(R) 4 CPU 3.00GHz (2994.90-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0xf29  Stepping = 9
  Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  Hyperthreading: 2 logical CPUs

Thanks,
Marc