Technical Product Specification

Intel
®
Server Board S2400EP TPS Technology Support
Revision 2.0 Intel order number G50763-002
53
DMAR. Each RMRR has a Device Scope listing the devices in the system that can cause a
DMA request to the region.
For more information on the DMAR table and the DRHD entry format, refer to the Intel
®
Virtualization Technology for Directed I/O Architecture Specification. For more general
information about VT-x, VT-d, and VT-c, a good reference is Enabling Intel
®
Virtualization
Technology Features and Benefits White Paper.
5.3 Intel
®
Intelligent Power Node Manager
Data centers face power and cooling challenges that are driven by increasing numbers of
servers deployed and server density in the face of several data center power and cooling
constraints. In this environment, Information Technology (IT) needs the ability to monitor actual
platform power consumption and control power allocation to servers and racks in order to solve
specific data center problems including the following issues.
Table 13. Data Center Problems and Issues
IT Challenge
Requirement
Over-allocation of power
 Ability to monitor actual power consumption
 Control capability that can maintain a power budget to enable dynamic
power allocation to each server
Under-population of rack space
Control capability that can maintain a power budget to enable increased rack
population.
High energy costs
Control capability that can maintain a power budget to ensure that a set
energy cost can be achieved
Capacity planning
 Ability to monitor actual power consumption to enable power usage
modeling over time and a given planning period
 Ability to understand cooling demand from a temperature and airflow
perspective
Detection and correction of hot
spots
 Control capability that reduces platform power consumption to protect a
server in a hot-spot
 Ability to monitor server inlet temperatures to enable greater rack
utilization in areas with adequate cooling.
The requirements listed above are those that are addressed by the C600 chipset Management
Engine (ME) and Intel
®
Intelligent Power Node Manager (NM) technology. The ME/NM
combination is a power and thermal control capability on the platform, which exposes external
interfaces that allow IT (through external management software) to query the ME about
platform power capability and consumption, thermal characteristics, and specify policy
directives (for example, set a platform power budget).
Node Manager (NM) is a platform resident technology that enforces power capping and
thermal-triggered power capping policies for the platform. These policies are applied by
exploiting subsystem knobs (such as processor P and T states) that can be used to control
power consumption. NM enables data center power management by exposing an external
interface to management software through which platform policies can be specified. It also
implements specific data center power management usage models such as power limiting, and
thermal monitoring.