Technical Product Specification

Table Of Contents
Intel
®
Server Board S5400SF TPS Server Management
Revision 2.02
Intel order number: D92944-007
71
4.16.4 Internal Error (IERR) Monitoring
The Integrated BMC monitors the IERR signal from each processor and maps this to the IERR
offset of the associated processor status sensor.
4.16.5 Dynamic Processor Voltage Monitoring
Processors used on Intel
®
server boards and systems that use the Intel
®
5400 Chipset 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 Integrated BMC to dynamically alter voltage
thresholds for direct monitoring of the processor voltages. However, the LM94 device supports
dynamic monitoring. The Integrated BMC reads a status register from the LM94 device, which
indicates if the processor voltage is within acceptable limits. This status is reflected in the
Processor Voltage Limit Fault sensors (one per processor).
The Integrated BMC provides threshold type sensors for reading the processor voltages. SEL
logging and other fault notification is handled by the Processor Voltage Limit Fault sensors
rather than the threshold sensors.
4.16.6 Processor Temperature Monitoring
Processors used on Intel
®
server boards and systems that use the Intel
®
5400 Chipset are multi-
core and have one physical temperature sensor per core. The type of physical temperature
sensor provided is processor-specific digital Thermal Sensor.
4.16.7 Processor Thermal Control Monitoring (ProcHot)
The Integrated BMC monitors processor thermal control monitoring for each processor. This
functionality is provided by an LM94 device which provides a reading of the percentage of time
that the processor ProcHot signal is asserted over a given measurement window (set to 5.8
seconds).
The Integrated BMC implements this as a threshold sensor (IPMI sensor type is ‘processor’,
sensor name is “Therm Ctrl %”) on a per-processor basis. This sensor supports one threshold
(the upper-critical) and it is set for 50% by default in the SDRs.
4.16.8 CPU Population Error Sensor
The only processor population check that the Integrated BMC performs is to verify that a
processor is installed in socket 1. The hardware does not allow the server to power up if a
processor is not installed in this socket.
At Integrated BMC initialization, the CPU Population Error sensor is first set to a de-asserted
state. The Integrated BMC then checks for CPU population errors and sets the new value
accordingly. If an error is detected and the SDR is so configured, a SEL event is logged. The
Integrated BMC checks for this fault condition and updates the sensor state at each attempt to
DC power on the system. At each DC power-on attempt, a beep code is generated if this fault is
detected.
This sensor is an auto-re-arm sensor but is not re-armed at system DC power-on or for system
resets. The correct way to clear this sensor state is to correct the problem by doing the
following: