Intel S2600CP Technical Product Specification - Page 102

Intel® Server Board S2600CP and Intel® Server System P4000CP Platform Management Intel® Server Board S2600CP and Server System P4000CP TPS 6.6.1 Hardware Requirements NM is supported only on platforms that have the NM FW functionality loaded and enabled on the Management Engine (ME) in the SSB and that have a BMC present to support the external LAN interface to the ME. NM power limiting features requires a means for the ME to monitor input power consumption for the platform. This capability is generally provided by means of PMBus*-compliant power supplies although an alternative model using a simpler SMBus* power monitoring device is possible (there is potential loss in accuracy and responsiveness using nonPMBus* devices). The NM SmaRT/CLST feature does specifically require PMBus*-compliant power supplies as well as additional hardware on the baseboard. 6.6.2 Features NM provides feature support for policy management, monitoring and querying, alerts and notifications, and an external interface protocol. The policy management features implement specific IT goals that can be specified as policy directives for NM. Monitoring and querying features enable tracking of power consumption. Alerts and notifications provide the foundation for automation of power management in the data center management stack. The external interface specifies the protocols that must be supported in this version of NM. 6.6.3 ME Firmware Update On server platforms, the ME FW uses a single operational image with a limited-functionality recovery image. In order to upgrade an operational image, a boot to recovery image must be performed. Unlike on Xeon 5500/5600 based platforms, the ME FW does not support an IPMI update mechanism except for the case that the system is configured with a dual-ME (redundant) image. In order to conserve flash space, which the ME FW shares with BIOS, the systems only support a single ME image. For this case, ME update is only supported by means of BIOS performing a direct update of the flash component. The recovery image only provides the basic functionality that is required to perform the update; therefore other ME FW features are not functional therefore when the update is in progress. 6.6.4 SmaRT/CLST The power supply optimization provided by SmaRT/CLST relies on a platform HW capability as well as ME FW support. When a PMBus*-compliant power supply detects insufficient input voltage, an overcurrent condition, or an over-temperature condition, it will assert the SMBAlert# signal on the power supply SMBus* (that is, the PMBus*). Through the use of external gates, this results in a momentary assertion of the PROCHOT# and MEMHOT# signals to the processors, thereby throttling the processors and memory. The ME FW also sees the SMBAlert# assertion, queries the power supplies to determine the condition causing the assertion, and applies an algorithm to either release or prolong the throttling, based on the situation. System power control modes include: 1. SmaRT: Low AC input voltage event; results in a onetime momentary throttle for each event to the maximum throttle state 2. Electrical Protection CLST: High output energy event; results in a throttling hiccup mode with fixed maximum throttle time and a fix throttle release ramp time. 3. Thermal Protection CLST: High power supply thermal event; results in a throttling hiccup mode with fixed maximum throttle time and a fix throttle release ramp time. When the SMBAlert# signal is asserted, the fans will be gated by HW for a short period (~100ms) to reduce overall power consumption. It is expected that the interruption to the fans will be of short enough duration to avoid false lower threshold crossings for the fan tach sensors; 86 Revision 1.2 Intel order number G26942-003