PowerMac G5 quad-core, CPU A1 DIODE TEMP: 90.8 C (for example): How to handle? [more data]

[Justin Hibbits]

Hi Mark,

All I can offer to this is a "Me Too".  With OS X, running 32 python
'while True: pass' instances, core temperature never once got above
75C, but with FreeBSD, ports building repeatedly caused shutdowns.
It's possible, I guess, that we are misreading the sensors, but I'm
not certain at all.

This happens with both of my quads.  I thought maybe the LCS just
needs recharged, but seeing your message, it might be a FreeBSD issue.

Nathan, can you comment on this?

- Justin

On Thu, Jan 15, 2015 at 2:33 PM, Mark Millard <markmi at dsl-only.net> wrote:
> For a well-operating PowerMac G5 quad-core for recording over 30 minutes, sampling about once a second, starting idle and doing "make -j 8 buildworld buildkernel":
>
> Low value to high value (for type of value to get idea of range expected)...
>
> dev.smusat.0.cpu_a0_diode_temp: 38.8C to dev.smusat.1.cpu_b1_diode_temp: 68.7C
>
> dev.smu.0.fans.cpu_a_intake.rpm: 484 to dev.smu.0.fans.cpu_a_intake.rpm: 1549
>
> dev.smu.0.fans.cpu_a_pump.rpm: 1235 to dev.smu.0.fans.cpu_a_pump.rpm: 2214
>
>
> I put the problem PowerMac G5 quad-core in a about 56degF room in order to try to have it run longer so I could collect more information. This seems to have been enough to keep it somewhat below 90degC generally for the CPU diodes over the initial 30 minutes of "make -j 8 buildworld buildkernel".
>
> Low value to high value (for type of value to get idea of range happening, limited to the first 30 minutes or so)...
>
> dev.smusat.0.cpu_a0_diode_temp: 38.2C to dev.smusat.0.cpu_a1_diode_temp: 90.2C
> (Just one 90.2C at that point and one dev.smusat.0.cpu_a1_diode_temp: 90.1C but a bunch of 89.[5-9]C's.)
>
> dev.smu.0.fans.cpu_a_intake.rpm: 485 to dev.smu.0.fans.cpu_a_intake.rpm: 3184
>
> dev.smu.0.fans.cpu_a_pump.rpm: 1254 to dev.smu.0.fans.cpu_a_pump.rpm: 3636
>
> Letting it run longer, however, has lead to more 90.[0-9]C's and messages like (all but the 1st two are from after the 30 minutes):
>
> WARNING: Current temperature (CPU A1 DIODE TEMP: 90.2 C) exceeds critical temperature (90.0 C); count=1
> WARNING: Current temperature (CPU A1 DIODE TEMP: 90.1 C) exceeds critical temperature (90.0 C); count=1
> WARNING: Current temperature (CPU A1 DIODE TEMP: 90.1 C) exceeds critical temperature (90.0 C); count=1
> WARNING: Current temperature (CPU A1 DIODE TEMP: 90.2 C) exceeds critical temperature (90.0 C); count=2
> WARNING: Current temperature (CPU A1 DIODE TEMP: 90.4 C) exceeds critical temperature (90.0 C); count=3
> WARNING: Current temperature (CPU A1 DIODE TEMP: 90.6 C) exceeds critical temperature (90.0 C); count=4
> WARNING: Current temperature (CPU A1 DIODE TEMP: 90.4 C) exceeds critical temperature (90.0 C); count=1
> WARNING: Current temperature (CPU A1 DIODE TEMP: 90.4 C) exceeds critical temperature (90.0 C); count=2
> WARNING: Current temperature (CPU A1 DIODE TEMP: 90.1 C) exceeds critical temperature (90.0 C); count=3
> WARNING: Current temperature (CPU A1 DIODE TEMP: 90.1 C) exceeds critical temperature (90.0 C); count=2
> WARNING: Current temperature (CPU A1 DIODE TEMP: 90.1 C) exceeds critical temperature (90.0 C); count=3
> WARNING: Current temperature (CPU A1 DIODE TEMP: 90.1 C) exceeds critical temperature (90.0 C); count=1
> WARNING: Current temperature (CPU A1 DIODE TEMP: 90.1 C) exceeds critical temperature (90.0 C); count=1
> WARNING: Current temperature (CPU A1 DIODE TEMP: 90.6 C) exceeds critical temperature (90.0 C); count=2
>
> It did automatically shut down after about 50 min. The other 3 CPU diodes were in the range 68C to 74C or so. A1 just seems to register hotter. It ended with the recorded sequence for a1:
>
> dev.smusat.0.cpu_a1_diode_temp: 89.2C
> dev.smusat.0.cpu_a1_diode_temp: 90.6C
> dev.smusat.0.cpu_a1_diode_temp: 90.6C
> dev.smusat.0.cpu_a1_diode_temp: 90.1C
> dev.smusat.0.cpu_a1_diode_temp: 89.9C
> dev.smusat.0.cpu_a1_diode_temp: 90.1C
> dev.smusat.0.cpu_a1_diode_temp: 90.9C
> dev.smusat.0.cpu_a1_diode_temp: 91.3C
> dev.smusat.0.cpu_a1_diode_temp: 91.1C
> dev.smusat.0.cpu_a1_diode_temp: 91.4C
> dev.smusat.0.cpu_a1_diode_temp: 91.8C
> dev.smusat.0.cpu_a1_diode_temp: 92.0C
>
>
> The high fan/pump figures recorded were:
>
> dev.smu.0.fans.cpu_b_intake.rpm: 3199
> dev.smu.0.fans.cpu_a_intake.rpm: 3200
> dev.smu.0.fans.cpu_b_exhaust.rpm: 3198
> dev.smu.0.fans.cpu_a_exhaust.rpm: 3199
> dev.smu.0.fans.cpu_a_pump.rpm: 3637
>
> These are all well above those recorded for the well-operating PowerMac G5 quad-core.
>
> ===
> Mark Millard
> markmi at dsl-only.net
>
>
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