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Date: Fri, 05 Feb 2010 16:26:30 +0200
From: Vasyl Samoilov <mail@vas.org.ua>
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To: freebsd-stable <freebsd-stable@freebsd.org>
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Cc: Oliver Fromme <olli@lurza.secnetix.de>
Subject: Re: amdtemp(4) oddities, Athlon 64 X2 (8-stable)
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05.02.2010 15:34, Oliver Fromme написав(ла):
> This is a RELENG_8 box, csupped on 2010-01-22, kernel built
> with amdtemp(4).  It's a dual-core Athlon 64, running i386
> (32bit) SMP.  Excerpt from dmesg:
>
> CPU: AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ (2009.28-MHz 686-class CPU)
>    Origin = "AuthenticAMD"  Id = 0x40fb2  Stepping = 2
>    Features=0x178bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2,HTT>
>    Features2=0x2001<SSE3,CX16>
>    AMD Features=0xea500800<SYSCALL,NX,MMX+,FFXSR,RDTSCP,LM,3DNow!+,3DNow!>
>    AMD Features2=0x1f<LAHF,CMP,SVM,ExtAPIC,CR8>
> [...]
> FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
> FreeBSD/SMP: 1 package(s) x 2 core(s)
> [...]
> amdtemp0:<AMD K8 Thermal Sensors>  on hostb3
>
> sysctl displays the following values (idle system):
>
> dev.cpu.0.temperature: 14.0C
> dev.cpu.1.temperature: 14.0C
> dev.amdtemp.0.sensor0.core0: 14.0C
> dev.amdtemp.0.sensor0.core1: 22.0C
> dev.amdtemp.0.sensor1.core0: -49.0C
> dev.amdtemp.0.sensor1.core1: -49.0C
> hw.acpi.thermal.tz0.temperature: 40.0C
>    
It's not Freebsd, it's cpu issuses. For brisbane core cpus CoreTemp 
author reported many times than the internal sensor seems to be 
defective because it reads ilogical temperatures.