From owner-freebsd-current@FreeBSD.ORG  Wed Sep 14 17:59:06 2011
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From: Andrew Boyer <aboyer@averesystems.com>
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Date: Wed, 14 Sep 2011 13:59:03 -0400
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To: Andriy Gapon <avg@FreeBSD.org>
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Subject: Identification of HTT cores on newer (CPUID leaf 11) Intel
	processors
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When FreeBSD examines the CPU topology using CPUID leaf 11 in =
topo_probe_0xb(), it never sets hyperthreading_cpus.  At the end of =
topo_probe_0x4() it sets hyperthreading_cpus =3D cpu_logical.

Adding that assignment to line 316 of sys/amd64/amd64/mp_machdep.c seems =
to do the right thing on a system with two quad-core E5620 CPUs.  The =
APIC IDs that appear when SMT is enabled in the BIOS get marked AP/HT.

Do you agree?

Thanks,
  Andrew

--------------------------------------------------
Andrew Boyer	aboyer@averesystems.com