Missing: hw.acpi.thermal.tz%d._HOT

Fri Jun 13 17:08:59 UTC 2014

On Fri, Jun 13, 2014 at 9:22 AM, Ian Smith <smithi at nimnet.asn.au> wrote:
> On Thu, 12 Jun 2014 14:28:33 -0700, hiren panchasara wrote:
>  > On Tue, Jun 10, 2014 at 8:40 AM, Eric Neblock <cen5848 at louisiana.edu> wrote:
>  > > On Wed, 2014-06-11 at 01:33 +1000, Ian Smith wrote:
>  > >> On Tue, 10 Jun 2014 09:54:14 -0500, Eric Neblock wrote:
>  > >>  > Hello all,
>  > >>  >   I'm trying to figure out what is the _HOT temperature on my particular
>  > >>  > processor. I'm running FreeBSD 10 GENERIC on a Sunfire X2200.
>  > >>  >
>  > >>  > The processor is an Dual Core AMD Opteron 2218.
>  > >>  >
>  > >>  > In the GENERIC kernel, acpi is built in; so, kldload acpi fails. I've
>  > >>  > also loaded the amdtemp module at boot time to figure out what the
>  > >>  > current temp of the processor is.
>  > >>  >
>  > >>  > With all of that, when performing `sysctl -a` I never seem to be able to
>  > >>  > pull up the _HOT value.
>  > >>  >
>  > >>  > Are there any suggestions on how to be able to view it?
>  > >>
>  > >> Many thermal zones seen, including some CPUs, don't specify any _HOT
>  > >> value, just _PSV and _CRT, which should trigger passive cooling (eg
>  > >> clock slowing or throttling) and emergency shutdown, respectively.
>  > >>
>  > >> What says 'sysctl hw.acpi.thermal' ?
>  > >>
>  > >> cheers, Ian
>  > >
>  > > The result is as follows:
>  > >
>  > > sysctl: Unknown oid 'hw.acpi.thermal' : No such file or directory
>  >
>  > Similar thing here at home desktop running -CURRENT:
>  >
>  > CPU: AMD FX(tm)-8350 Eight-Core Processor            (4000.24-MHz K8-class CPU)
>  >   Origin="AuthenticAMD"  Id=0x600f20  Family=0x15  Model=0x2  Stepping=0
>  >
>  > acpi0: <7596MS A7596100> on motherboard
>  >
>  > Other related bits:
>  >
>  > # sysctl hw.acpi
>  > hw.acpi.supported_sleep_state: S3 S4 S5
>  > hw.acpi.power_button_state: S5
>  > hw.acpi.sleep_button_state: S3
>  > hw.acpi.lid_switch_state: NONE
>  > hw.acpi.standby_state: NONE
>  > hw.acpi.suspend_state: S3
>  > hw.acpi.sleep_delay: 1
>  > hw.acpi.s4bios: 0
>  > hw.acpi.verbose: 0
>  > hw.acpi.disable_on_reboot: 0
>  > hw.acpi.handle_reboot: 0
>  > hw.acpi.reset_video: 0
>  > hw.acpi.cpu.cx_lowest: C8
>  > #
>  >
>  > # sysctl dev.amdtemp
>  > dev.amdtemp.0.%desc: AMD CPU On-Die Thermal Sensors
>  > dev.amdtemp.0.%driver: amdtemp
>  > dev.amdtemp.0.%parent: hostb4
>  > dev.amdtemp.0.sensor_offset: 0
>  > dev.amdtemp.0.core0.sensor0: 15.3C
>  >
>  > # sysctl -a dev.cpu | grep temp
>  > dev.cpu.0.temperature: 15.2C
>  > dev.cpu.1.temperature: 15.2C
>  > dev.cpu.2.temperature: 15.2C
>  > dev.cpu.3.temperature: 15.2C
>  > dev.cpu.4.temperature: 15.2C
>  > dev.cpu.5.temperature: 15.2C
>  > dev.cpu.6.temperature: 15.2C
>  > dev.cpu.7.temperature: 15.2C
>  >
>  > I am not sure how this ^ relates to what acpi reports under thermal.
>
> Well first, unless you've just turned it on, it's idling and lives in a
> refrigerator or coldroom, those temperatures are at best a third of the
> minimum I'd expect to see reported .. and they wouldn't all be the same.

Oh wait. It gets better :-)

# uptime
 9:42AM  up 10 days,  9:04, 1 user, load averages: 0.37, 0.29, 0.24
# sysctl -a dev.cpu | grep temp
dev.cpu.0.temperature: 13.6C
dev.cpu.1.temperature: 13.6C
dev.cpu.2.temperature: 13.6C
dev.cpu.3.temperature: 13.6C
dev.cpu.4.temperature: 13.6C
dev.cpu.5.temperature: 13.6C
dev.cpu.6.temperature: 13.6C
dev.cpu.7.temperature: 13.6C
#

I am not sure how correct these numbers are but I've enabled AMD's
Cool'n'Quiet thingi in BIOS.

# sysctl dev.cpu | grep cx_lowest
dev.cpu.0.cx_lowest: C8
dev.cpu.1.cx_lowest: C8
dev.cpu.2.cx_lowest: C8
dev.cpu.3.cx_lowest: C8
dev.cpu.4.cx_lowest: C8
dev.cpu.5.cx_lowest: C8
dev.cpu.6.cx_lowest: C8
dev.cpu.7.cx_lowest: C8
#

>From top:

last pid: 53106;  load averages:  0.13,  0.18,  0.19
                                      up 10+09:27:27  10:06:21
88 processes:  1 running, 87 sleeping
CPU:  0.3% user,  0.1% nice,  0.3% system,  0.0% interrupt, 99.2% idle
Mem: 58M Active, 1006M Inact, 14G Wired, 12M Cache, 590M Free
ARC: 8753M Total, 1834M MFU, 4757M MRU, 272K Anon, 210M Header, 1952M Other
Swap: 16G Total, 16G Free

>
> And neither of these are reporting hw.acpi.thermal .. is it because the
> BIOS / ACPI doesn't present thermal zone information?
I'd believe so.

>  Or there aren't
> suitable drivers to interpret it?  I've no idea, but does seem curious.
>
> Any output from?
> # acpidump -dt | egrep -i 'TZ|thermal'
nothing.

# acpidump -dt | egrep -i 'TZ|thermal'
acpidump: RSDT entry 3 (sig OEMB) is corrupt

Now this ^^ error might also suggest something is wrong.

>
> If so, you might want to put your full ASL up somewhere.
# acpidump -dt | gzip -c9 >  amd_fx8350.asl.gz

amd_fx8350.asl.gz is attached.

By the time I collected everything,

# sysctl dev.cpu | grep temp
dev.cpu.0.temperature: 14.0C
dev.cpu.1.temperature: 14.0C
dev.cpu.2.temperature: 14.0C
dev.cpu.3.temperature: 14.0C
dev.cpu.4.temperature: 14.0C
dev.cpu.5.temperature: 14.0C
dev.cpu.6.temperature: 14.0C
dev.cpu.7.temperature: 14.0C

Cheers,
Hiren