How is hyperthreading handled on amd64?
John Baldwin
jhb at freebsd.org
Mon Mar 13 20:32:24 UTC 2006
On Monday 13 March 2006 15:04, Bill Moran wrote:
> On Mon, 13 Mar 2006 14:06:34 -0500
> John Baldwin <jhb at freebsd.org> wrote:
>
> [...]
> > > I can't argue that the boot messages don't seem to show anything to
> > > indicate that a second logical CPU was found.
> >
> > Grab the dmesg from /var/run/dmesg.boot rather than /var/log/messages
> > please.
>
> Copyright (c) 1992-2005 The FreeBSD Project.
> Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
> The Regents of the University of California. All rights reserved.
> FreeBSD 6.0-RELEASE-p5 #1: Fri Mar 10 16:57:56 EST 2006
> root@:/usr/obj/usr/src/sys/DB64
> Timecounter "i8254" frequency 1193182 Hz quality 0
> CPU: Intel(R) Xeon(TM) CPU 3.00GHz (2992.71-MHz K8-class CPU)
> Origin = "GenuineIntel" Id = 0xf41 Stepping = 1
> 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>
> Features2=0x641d<SSE3,RSVD2,MON,DS_CPL,CNTX-ID,CX16,<b14>>
> AMD Features=0x20000800<SYSCALL,LM>
> Hyperthreading: 2 logical CPUs
> real memory = 2147221504 (2047 MB)
> avail memory = 2066378752 (1970 MB)
> ACPI APIC Table: <DELL PE BKC >
> FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
> cpu0 (BSP): APIC ID: 0
> cpu1 (AP): APIC ID: 1
This is a dmesg from an SMP kernel this time. :)
Can you provide the output from 'sysctl machdep'?
--
John Baldwin <jhb at FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve" = http://www.FreeBSD.org
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