System Management Intel® 5000 Series Chipsets Server Board Family Datasheet
Revision 1.1
Intel order number D38960-004
116
processor increases in temperature, the amount of time the processor spends in a throttled
state will increase, until 100% throttling is reached.
4.13.5.1.1 IPMI Sensor Support for PROCHOT
PROCHOT time window: The PROCHOT sensor measures the % of throttling on an
individual processor over a 5.8 second time window.
Detecting PROCHOT sensors: The PROCHOT sensors will be a type code (01h) =
temperature, but is read as a %. This is determined by reading bit 0 of the 'sensor units
1' field of the PROCHOT SDR. If bit 0 of this byte is 1b, then the sensor unit is read as a
%. This is a standard method in IPMI to determine if a sensor is read as a %.
PROCHOT sensor name: The PROCHOT sensors are called Px Therm Ctrl % on Intel
S5000 systems, where 'x' is the processor #. Example: Processor 1 would read P1
Therm Ctrl %.
PROCHOT thresholds: The PROCHOT sensors will have an upper critical threshold
and should be treated as a normal threshold sensor.
4.13.6 IERR Monitoring
The BMC monitors the IERR signal from each processor and maps this to the IERR offset of the
associated processor status sensor.
4.13.7 Dynamic Processor Voltage Monitoring
Processors support dynamic operating states in which the processor VIDs can change under
program control or due to operating conditions. It is not feasible for the BMC to dynamically alter
voltage thresholds for direct monitoring of the processor voltages. However, the National
Semiconductor* LM94 system management controller device supports dynamic monitoring. The
BMC reads a status register from the LM94 system management controller, which indicates if
the processor voltage is within acceptable limits.
4.13.8 Processor Temperature Monitoring
Processors used with platforms that use one of the Intel
®
5000 Series Chipsets are dual-core
and have one physical temperature sensor per core. The BMC aggregates the processor
temperature sensing into one IPMI temperature sensor per socket. The higher of the two
temperatures is used as the value of the IPMI sensor.
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