Specifications

QSSC-S4R Technical Product Specification Processor Presence and Population Check
265
Table 179. Processor Sensors
Sensor Name Per Per-Proc Socket Description
Processor Status Yes Processor presence and fault state
Digital Thermal Sensor Yes
Relative temperature reading via
PECI
Processor VRD Over-
Temperature Indication
Yes
Discrete sensor that indicates a
processor VRD has crossed an
upper operating temperature
threshold
Processor Voltage Yes
Threshold sensor that indicates a
processor power good state
Processor Thermal Control
(Prochot)
Yes
Percentage of time a processor is
throttling due to thermal conditions
24.11.1 Processor Status Sensors
The BMC provides an IPMI sensor of type processor for monitoring status information for each processor slot. If an
event state (sensor offset) has been asserted, it remains asserted until one of the following happens:
x A Rearm Sensor Events command is executed for the processor status sensor.
x AC or DC power cycle, system reset, or system boot occurs.
The BMC provides system status indication to the front panel LEDs for processor fault conditions shown in the table
below. See 24.2.2.
CPU Presence status is not saved across AC power cycles and so will not generate a deassertion after cycling AC
power.
Table 180. Processor Status Sensor Implementation
Offset Processor Status Detected By
0 Internal error (IERR) Not Supported
1 Thermal trip BMC
2 FRB1 / BIST failure Not Supported
3 FRB2 / Hang in POST failure BIOS
1
4
FRB3 / Processor startup / initialization
failure (CPU fails to start)
Not Supported
5 Configuration error (for DMI) BIOS
1
6 SM BIOS uncorrectable CPU-complex error Not Supported
7 Processor presence detected BMC
8 Processor disabled Not Supported
9 Terminator presence detected Not Supported
Note:
1. Fault is not reflected in the processor status sensor.
24.11.1.1 Processor Presence
When the BMC detects an empty processor socket, it sets the disable bit in the processor status for that socket and
clears the remaining status bits.