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Date: Sat, 6 Apr 2019 19:50:31 +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 Fri, Apr 05, 2019 at 11:47:58AM -0700, Mark Millard wrote:
> 
> 
> On 2019-Apr-5, at 04:46, Konstantin Belousov <kostikbel at gmail.com> wrote:
> 
> > 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
> >> 
> >> . . . 
> > 
> > In the output of devinfo(8), how many CPUs do you see ?  Is there cpu31,
> > and does it have amdtemp child ?
> 
> (I only used 'sysctl -a | grep "temp.*[0-9]C$"' as a short
> way to show one line per dev.cpu.N so show the others  were
> all present.)
> 
> cpu31 is missing in the devinfo output. The amdtempM's are under
> pcibX > pciY > hostbZ , not per cpuN .
> 
> Shortended output but showing all the cpuN and amdtmpM
> and their "parents" and "childern":
> 
> # devinfo
> nexus0
>   cryptosoft0
>   vtvga0
>   apic0
>   ram0
>   acpi0
>     cpu0
>       hwpstate0
>       cpufreq0
>     cpu1
>     cpu2
>     cpu3
>     cpu4
>     cpu5
>     cpu6
>     cpu7
>     cpu8
>     cpu9
>     cpu10
>     cpu11
>     cpu12
>     cpu13
>     cpu14
>     cpu15
>     cpu16
>     cpu17
>     cpu18
>     cpu19
>     cpu20
>     cpu21
>     cpu22
>     cpu23
>     cpu24
>     cpu25
>     cpu26
>     cpu27
>     cpu28
>     cpu29
>     cpu30
>     pcib0
>       pci0
>         hostb0
>           amdsmn0
>           amdtemp0
> . . ,
>     pcib12
>       pci12
>         hostb23
>           amdsmn1
>           amdtemp1
> . . .

Ok, I see, it was unexpected to see amdtemp to attach under the host
bridge instead of cpu device.  Please post complete output of devinfo -r
and pciconf -lvcb somewhere.