Gigabyte 970A-UD3P and hwpstate problem

[John Baldwin]

On Sunday, July 12, 2015 03:23:21 PM Mario Lobo wrote:
> On Sat, 11 Jul 2015 15:50:06 +0200
> "Herbert J. Skuhra" <herbert at oslo.ath.cx> wrote:
> 
> > On Fri, Jul 10, 2015 at 09:37:52PM -0300, Mario Lobo wrote:
> > > Hi;
> > > 
> > > I just installed a Gigabyte 970A-UD3P mobo and updated BIOS to the
> > > latest version but the problem also showed with the previous
> > > version.
> > > 
> > > Here is my amd64 10-STABLE setup:
> > > 
> > > FreeBSD 10.2-PRERELEASE #0 r285207M: Tue Jul  7 00:11:01 BRT 2015
> > > amd64
> > > 
> > > CPU: AMD FX-8320E Eight-Core Processor (3214.93-MHz K8-class CPU)
> > >   Origin="AuthenticAMD"  Id=0x600f20  Family=0x15  Model=0x2
> > > Stepping=0
> > > 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=0x3e98320b<SSE3,PCLMULQDQ,MON,SSSE3,FMA,CX16,SSE4.1,SSE4.2,POPCNT,AESNI,XSAVE,OSXSAVE,AVX,F16C>
> > > AMD Features=0x2e500800<SYSCALL,NX,MMX+,FFXSR,Page1GB,RDTSCP,LM> AMD
> > > Features2=0x1ebbfff<LAHF,CMP,SVM,ExtAPIC,CR8,ABM,SSE4A,MAS,Prefetch,OSVW,IBS,XOP,SKINIT,WDT,LWP,FMA4,TCE,NodeId,TBM,Topology,PCXC,PNXC>
> > >   Structured Extended Features=0x8<BMI1>
> > >   SVM: NP,NRIP,VClean,AFlush,DAssist,NAsids=65536
> > >   TSC: P-state invariant, performance statistics
> > > real memory  = 17179869184 (16384 MB)
> > > [snip]
> > > ACPI BIOS Warning (bug): Optional FADT field Pm2ControlBlock has
> > > zero address or length: 0x0000000000000000/0x1 (20150515/tbfadt-673)
> > > [snip]
> > > hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff on
> > > acpi0
> > > 
> > > The problem:
> > > 
> > > powerd: no cpufreq(4) support -- aborting: No such file or directory
> > > /etc/rc: WARNING: failed to start powerd
> > 
> > Could this be your problem:
> > 
> > r276986 | nwhitehorn | 2015-01-11 18:10:07 +0100 (søn, 11 jan 2015) |
> > 8 lines
> > 
> > MFC r265329:
> > Disable ACPI and P4TCC throttling by default, following discussion on
> > freebsd-current. These CPU speed control techniques are usually
> > unhelpful at best. For now, continue building the relevant code into
> > GENERIC so that it can trivially be re-enabled at runtime if anyone
> > wants it.
> > 
> > Relnotes:       yes
> > 
> > % svnlite diff -c 276986 sys/amd64/conf/GENERIC.hints 
> > Index: sys/amd64/conf/GENERIC.hints
> > ===================================================================
> > --- sys/amd64/conf/GENERIC.hints        (revision 276985)
> > +++ sys/amd64/conf/GENERIC.hints        (revision 276986)
> > @@ -31,3 +31,5 @@
> >  hint.attimer.0.port="0x40"
> >  hint.attimer.0.irq="0"
> >  hint.wbwd.0.at="isa"
> > +hint.acpi_throttle.0.disabled="1"
> > +hint.p4tcc.0.disabled="1"
> > 
> > Does it work if your unset or remove those lines
> > from /boot/device.hints?
> > 
> 
> YEEESSS ! Thanks for pointing that out!
> 
> I have these commented on my loader.conf but I didn't know they were
> active somewhere else.
> 
> As far as cpufreq/powerd goes, it's working now and frequencies are
> being throttled but still no cool'n'quiet/hwpstate0 showing on dmesg.
> acpi_throttle attaches to cpu0 but not to the others.

The acpi_throttle isn't really that helpful though.  You probably want
to try to add support for your CPU to the hwpstate driver instead and
leave acpi_throttle disabled.

Can you run 'kgdb' as root and get the output of 'p amd_pminfo'?

Hmm, do you have an acpi_perf0 device?  If not, then your CPU isn't
supported without BIOS help.  First check to see if there are any BIOS
options to control CPU throttling that are currently disabled.

-- 
John Baldwin