Datasheet
Intel® Xeon® Processor E5-2400 v2 Product Family 45
Datasheet Volume One
2.5.2.6.11 CPU Thermal and Power Optimization Capabilities
Table 2-8 provides a summary of the processor power and thermal optimization
capabilities that can be accessed over PECI.
Note: The Index values referenced in Table 2-8 are in decimal format.
Table 2-8 also provides information on alternate inband mechanisms to access similar
or equivalent information for register reads and writes where applicable. The user
should consult the appropriate Intel® Xeon® Processor E5 v2 Product Family
Datasheet, Volume Two: Registers or Intel® Xeon® Processor E5 v2 Product Family
Datasheet, Volume Two: Registers for exact details on MSR or CSR register content.
Figure 2-20. DRAM Power Limit Performance Data
DRAM Power Limit Performance
Accumulated DRAM Throttle Time
0
31
Table 2-8. RdPkgConfig() & WrPkgConfig() CPU Thermal and Power Optimization
Services Summary (Sheet 1 of 4)
Service
Index
Value
(decimal)
Parameter
Value
(word)
RdPkgConfig()
Data
(dword)
WrPkgConfig
()
Data
(dword)
Description
Alternate
Inband
MSR or CSR
Access
Package
Identifier Read
00 0x0000 CPUID
Information
Returns processor-
specific information
including CPU family,
model and stepping
information.
Execute CPUID instruction to get
processor signature
0x0001 Platform ID Used to ensure
microcode update
compatibility with
processor.
MSR 17h: IA32_PLATFORM_ID
0x0002 PCU Device ID Returns the Device
ID information for
the processor Power
Control Unit.
CSR: DID
0x0003 Max Thread ID Returns the
maximum ‘Thread
ID’ value supported
by the processor.
MSR: RESOLVED_CORES_MASK
CSR: RESOLVED_CORES_MASK
0x0004 CPU Microcode
Update Revision
Returns processor
microcode and PCU
firmware revision
information.
MSR 8Bh: IA32_BIOS_SIGN_ID
0x0005 MCA Error
Source Log
Returns the MCA
Error Source Log
CSR: MCA_ERR_SRC_LOG
Package Power
SKU Unit Read
30 0x0000 Time, Energy
and Power Units
N/A Read units for power,
energy and time
used in power
control registers.
MSR 606h:
PACKAGE_POWER_SKU_UNIT
CSR:
PACKAGE_POWER_SKU_UNIT