Intel CM8062101038606, E5-4600 manual Wake on Peci Mode Bit Write / Read, Accumulated Run Time Read

Figure 2-28. Package Power SKU Data

63			55	54	48	47	46	32
		Reserved			Maximum Time	Reserved		Maximum Package Power
					Window
					Package Power SKU (upper bits)
31		30			16	15	14	0
	Reserved		Minimum Package Power			Reserved		TDP Package Power
					Package Power SKU (lower bits)

2.5.2.6.15“Wake on PECI” Mode Bit Write / Read

Setting the “Wake on PECI” mode bit enables successful completion of the WrPCIConfigLocal(), RdPCIConfigLocal(), WrPCIConfig() and RdPCIConfig() PECI commands by forcing a package ‘pop-up’ to the C2 state to service these commands if the processor is in a low-power state. The exact power impact of such a ‘pop-up’ is determined by the product SKU, the C-state from which the pop-up is initiated and the negotiated PECI bit rate. A ‘reset’ or ‘clear’ of this bit or simply not setting the “Wake on PECI” mode bit could result in a “timeout” response (completion code of 0x82) from the processor indicating that the resources required to service the command are in a low power state.

Alternatively, this mode bit can also be read to determine PECI behavior in package states C3 or deeper.

2.5.2.6.16Accumulated Run Time Read

This read returns the total time for which the processor has been executing with a resolution of 1 mS per count. This is tracked by a 32-bit counter that rolls over on reaching the maximum value. This counter activates and starts counting for the first time at RESET_N de-assertion.

2.5.2.6.17Package Temperature Read

This read returns the maximum processor die temperature in 16-bit PECI format. The upper 16 bits of the response data are reserved. The PECI temperature data returned by this read is the ‘instantaneous’ value and not the ‘average’ value as returned by the PECI GetTemp() described in Section 2.5.2.3.

Figure 2-29. Package Temperature Read Data

31	16	15	14	6	5	0
	RESERVED	Sign		PECI Temperature		PECI Temperature
		Bit		(Integer Value)		(Fractional Value)

52	Intel® Xeon® Processor E5-1600/E5-2600/E5-4600 Product Families
	Datasheet Volume One