Datasheet

Datasheet, Volume 2 417
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Processor Uncore Configuration Registers
4.2.13.18 ET_CH_AVG—Electrical Throttling Energy Averager Register
4.2.13.19 ET_CH_SUM—Electrical Throttling Energy Accumulator Register
4.2.13.20 ET_CH_TH—Electrical Throttling Energy Threshold
ET_CH_AVG
Bus: 1 Device: 16 Function: 0 Offset: 1F4h
Bus: 1 Device: 16 Function: 1 Offset: 1F4h
Bus: 1 Device: 16 Function: 4 Offset: 1F4h
Bus: 1 Device: 16 Function: 5 Offset: 1F4h
Bit Attr
Reset
Value
Description
31:18 RV 0h Reserved
17:0 RW-V 00000h
ET_CH_AVG
Channel Average EnergyAvg(i)=Sum(i)/ET_DIV+Avg(i-1) – Avg(i-1)/ET_DIV
ET_CH_SUM
Bus: 1 Device: 16 Function: 0 Offset: 1F8h
Bus: 1 Device: 16 Function: 1 Offset: 1F8h
Bus: 1 Device: 16 Function: 4 Offset: 1F8h
Bus: 1 Device: 16 Function: 5 Offset: 1F8h
Bit Attr
Reset
Value
Description
31:18 RV 0h Reserved
17:0 RW-V 00000h
ET_CH_SUM: Channel Energy Current Sum Counter
When the ET_SAMPLE_PERIOD counter is counting zero, the current sum (that is,
sum(i)) is used in the above Avg(i) calculation), the ET_CH_SUM is reset in the
next DCLK. The ET_CH_SUM is sized to be sufficient for worst case scenarios to
avoid overflowing within valid ET_SAMPLE_PERIOD range.
ET_CH_TH
Bus: 1 Device: 16 Function: 0 Offset: 1FCh
Bus: 1 Device: 16 Function: 1 Offset: 1FCh
Bus: 1 Device: 16 Function: 4 Offset: 1FCh
Bus: 1 Device: 16 Function: 5 Offset: 1FCh
Bit Attr
Reset
Value
Description
31:16 RW FFFFh
ET_CH_HI_TH
The 16b ET_CH_HI_TH field is actually the high order 16b of the 18b threshold
value; that is, ET_CH_HI_TH[17:2]. 00b bits are the two least significant bits of
the 18b threshold.
Channel energy high threshold.Assert electrical throttling when ET_CH_AVG[17:0]
is greater than ET_CH_HI_TH[17:0].
Note: Firmware may dynamically change and restore the programmed threshold.
Updating the threshold should take effect in the next DCLK.
15:0 RW FFFFh
ET_CH_LO_TH
The 16b ET_CH_LO_TH field is actually the high order 16b of the 18b threshold
value; that is, ET_CH_LO_TH[17:2]. 00b bits are the two least significant bits of
the 18b threshold.
Channel energy low threshold.de-assert electrical throttling when
ET_CH_AVG[17:0] is less than or equal to ET_CH_LO_TH[17:0].
Note: Firmware may dynamically change and restore the programmed threshold.
Updating the threshold should take effect in the next DCLK.