Oles Hnatkevych wrote: > Hello! > > Just cvsup-ed and upgraded to 6.2-STABLE. > > The box has hyperthreading processor: > > # more /var/run/dmesg.boot |grep -i cpu > CPU: Intel(R) Pentium(R) 4 CPU 3.00GHz (3000.37-MHz 686-class CPU) > Logical CPUs per core: 2 > FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs > cpu0 (BSP): APIC ID: 0 > cpu1 (AP): APIC ID: 1 > cpu0: <ACPI CPU> on acpi0 > cpu1: <ACPI CPU> on acpi0 > SMP: AP CPU #1 Launched! [...] > What it can be????
This is done intentionally on all -STABLE branches, see http://security.freebsd.org/advisories/FreeBSD-SA-05:09.htt.asc for details. Note that it is possible to re-enable htt if you know what you are doing, by setting machdep.hyperthreading_allowed. Please note that enabling hyperthreading does hurt performance for many cases, so you will want to evaluate if you really want it, or to disable it from BIOS. Cheers, -- Xin LI <[EMAIL PROTECTED]> http://www.delphij.net/ FreeBSD - The Power to Serve!
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