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 = 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 abo...@averesystems.com _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
