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Date: Fri, 5 Apr 2019 14:46:17 +0300
From: Konstantin Belousov <kostikbel@gmail.com>
To: Mark Millard <marklmi@yahoo.com>
Cc: freebsd-amd64@freebsd.org
Subject: Re: head -r345758 Ryzen Threadripper 1950X vs. amdtemp.ko :
 dev.cpu.31 missing
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On Thu, Apr 04, 2019 at 04:58:15PM -0700, Mark Millard via freebsd-amd64 wrote:
> On a:
> 
> CPU: AMD Ryzen Threadripper 1950X 16-Core Processor  (3393.70-MHz K8-class CPU)
>   Origin="AuthenticAMD"  Id=0x800f11  Family=0x17  Model=0x1  Stepping=1
>  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=0x7ed8320b<SSE3,PCLMULQDQ,MON,SSSE3,FMA,CX16,SSE4.1,SSE4.2,MOVBE,POPCNT,AESNI,XSAVE,OSXSAVE,AVX,F16C,RDRAND>
>   AMD Features=0x2e500800<SYSCALL,NX,MMX+,FFXSR,Page1GB,RDTSCP,LM>
>   AMD Features2=0x35c233ff<LAHF,CMP,SVM,ExtAPIC,CR8,ABM,SSE4A,MAS,Prefetch,OSVW,SKINIT,WDT,TCE,Topology,PCXC,PNXC,DBE,PL2I,MWAITX>
>   Structured Extended Features=0x209c01a9<FSGSBASE,BMI1,AVX2,SMEP,BMI2,RDSEED,ADX,SMAP,CLFLUSHOPT,SHA>
>   XSAVE Features=0xf<XSAVEOPT,XSAVEC,XINUSE,XSAVES>
>   AMD Extended Feature Extensions ID EBX=0x1007<CLZERO,IRPerf,XSaveErPtr,IBPB>
>   SVM: NP,NRIP,VClean,AFlush,DAssist,NAsids=32768
>   TSC: P-state invariant, performance statistics
> 
> after "kldload amdtemp" the following is seen:
> 
> # sysctl dev.cpu.31
> sysctl: unknown oid 'dev.cpu.31'
> 
> # sysctl dev.cpu.30
> dev.cpu.30.temperature: 62.1C
> dev.cpu.30.cx_method: C1/hlt C2/io
> dev.cpu.30.cx_usage_counters: 0 0
> dev.cpu.30.cx_usage: 0.00% 0.00% last 1000000us
> dev.cpu.30.cx_lowest: C1
> dev.cpu.30.cx_supported: C1/1/0 C2/2/100
> dev.cpu.30.%parent: acpi0
> dev.cpu.30.%pnpinfo: _HID=none _UID=0
> dev.cpu.30.%location: handle=\_PR_.C01F
> dev.cpu.30.%driver: cpu
> dev.cpu.30.%desc: ACPI CPU
> 
> # sysctl -a | grep "temp.*[0-9]C$"
> dev.amdtemp.1.core0.sensor0: 62.0C
> dev.amdtemp.0.core0.sensor0: 62.1C
> dev.cpu.30.temperature: 62.1C
> dev.cpu.29.temperature: 62.1C
> dev.cpu.28.temperature: 62.1C
> dev.cpu.27.temperature: 62.1C
> dev.cpu.26.temperature: 62.1C
> dev.cpu.25.temperature: 62.1C
> dev.cpu.24.temperature: 62.1C
> dev.cpu.23.temperature: 62.1C
> dev.cpu.22.temperature: 62.1C
> dev.cpu.21.temperature: 62.1C
> dev.cpu.20.temperature: 62.1C
> dev.cpu.19.temperature: 62.1C
> dev.cpu.18.temperature: 62.1C
> dev.cpu.17.temperature: 62.1C
> dev.cpu.16.temperature: 62.1C
> dev.cpu.15.temperature: 62.1C
> dev.cpu.14.temperature: 62.1C
> dev.cpu.13.temperature: 62.1C
> dev.cpu.12.temperature: 62.1C
> dev.cpu.11.temperature: 62.1C
> dev.cpu.10.temperature: 62.1C
> dev.cpu.9.temperature: 62.1C
> dev.cpu.8.temperature: 62.1C
> dev.cpu.7.temperature: 62.1C
> dev.cpu.6.temperature: 62.1C
> dev.cpu.5.temperature: 62.1C
> dev.cpu.4.temperature: 62.1C
> dev.cpu.3.temperature: 62.1C
> dev.cpu.2.temperature: 62.1C
> dev.cpu.1.temperature: 62.1C
> dev.cpu.0.temperature: 62.1C

In the output of devinfo(8), how many CPUs do you see ?  Is there cpu31,
and does it have amdtemp child ?