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

[Mark Millard]

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