Intel S1400FP - 5.2 Temperature Sensors; 5.2.1 Threshold-based Temperature Sensors

System Event Log Troubleshooting Guide for EPSD Platforms Based on Intel
®
Xeon
®
Processor E5 4600/2600/2400/1600/1400 Product Families
Cooling Subsystem
Revision 1.1 Intel order number G90620-002 49
5.2 Temperature Sensors
There are a variety of temperature sensors that can be implemented on Intel
®
Server Systems. They are split into various types each
with their own events that can be logged.
 Threshold-based Temperature
 Thermal Margin
 Processor Thermal Control %
 Processor DTS Thermal Margin (Monitor only)
 Discrete Thermal
 DIMM Thermal Trip
5.2.1 Threshold-based Temperature Sensors
Threshold-based temperature sensors are sensors that report an actual temperature. These are linear, threshold-based sensors. In
most Intel
®
Server Systems, multiple sensors are defined: front panel temperature and baseboard temperature. There are also
multiple other sensors that can be defined and are platform-specific. Most of these sensors typically have upper and lower thresholds
set – upper to warn in case of an over-temperature situation, lower to warn against sensor failure (temperature sensors typically read
out 0 if they stop working).
Table 35: Temperature Sensors Typical Characteristics
Byte
Field
Description
11
Sensor Type
01h = Temperature
12
Sensor Number
See Table 37
13
Event Direction and
Event Type
[7] Event direction
0b = Assertion Event
1b = Deassertion Event
[6:0] Event Type = 01h (Threshold)
14
Event Data 1
[7:6] – 01b = Trigger reading in Event Data 2
[5:4] – 01b = Trigger threshold in Event Data 3
[3:0] – Event Trigger Offset as described in Table 36
15
Event Data 2
Reading that triggered event