PECI Interface
70 Thermal/Mechanical Specifications and Design Guide
Socket
Performance
Indication Read
06 0x0000
Number of retired
instructions per time
unit
N/A
Read retired instruction count for
power budgeting purposes.
Per core DTS
temperature
Read
09
Index: on
4core+GT die
x00- core 0
x01 - core 1
x02 - core 2
x03 - core 3
x04 -core 4(GT)
If GT exists / or
enabled
Index on 2core die
x00- core 0
x01 - core 1
x02- core 2(GT) If
GT exists / or
enabled
0xFF – System
Agent temperature
Read Per - core DTS
data
N/A
Per core DTS maximum
temperature
[15:0] - Core temperature using
the same temperature format as
in Package Temperature.
[32:16] – Reserved
Command returns an error code
of 0x90 if the parameter (index)
used is outside the range
supported by the die.
that is, if parameter of 3..5 is
used on a 2+1 die
Note: Temperature data returned
is instantaneous temperature
updated every 1 mS.
ACPI P-T Notify
Read/Write
33 0x00
Reads the last ACPI
P-State limit from
PCU
Notifies PCU of
the last ACPI
notify for P-State
limit (_PPC ACPI
Object)
[7:0] - Equivalent P1 P-state for
the processor.
This is typically 1 P-state below
what is sent to OS using the _PPC
method.
Processor treats any P-State
request higher than that specified
in [7:0] as a request for P0
(Original Max single core turbo
frequency).
Any request equal or below what
is specified in [7:0] will be
honored as is by the processor.
This does not affect the Thermal
Throttling behavior as Thermal
throttling will use all P-States and
T-States as necessary.
ACPI P-T Notify effects are only
applicable if power limit is
enabled and clamp mode is set
Table 7-8. RdPkgConfig() & WrPkgConfig() Processor Thermal and Power Optimization
Services Summary (Sheet 3 of 3)
Service
Index
Value
(byte)
Parameter
Value
(word)
RdPkgConfig()
Data
(dword)
WrPkgConfig()
Data
(dword)
Description
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