By Corey Gough, Ian Steiner, Winston A. Saunders
Power effective Servers: Blueprints for information heart Optimization introduces engineers and IT pros to the facility administration applied sciences and methods utilized in power effective servers. The booklet encompasses a deep exam of alternative positive aspects utilized in processors, reminiscence, interconnects, I/O units, and different platform elements. It outlines the facility and function influence of those beneficial properties and the position firmware and software program play in initialization and keep an eye on. utilizing examples from cloud, HPC, and firm environments, the ebook demonstrates how quite a few strength administration applied sciences are applied throughout a number server usage. It teaches the reader tips to computer screen, study, and optimize their surroundings to top swimsuit their wishes. It stocks optimization thoughts utilized by information heart directors and method optimization specialists on the world’s so much complicated info facilities.
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Extra info for Energy Efficient Servers: Blueprints for Data Center Optimization
This is referred to as the active power of the CPU. There are two components to active power: • Power consumed by the clocks that run throughout the CPU. • Power consumed by the actual logic that is performing computation. Only a subset of the bits in the CPU transition between 0 and 1 in a given cycle. Different workloads exhibit different switching rates. This leads to the application ratio (AR) value in the equation, which modulates the active power. For example, it is common for certain types of workloads to not perform floating point math.
These imbalances are constantly shifting and moving, but it is possible to take advantage of transient imbalances and reduce the frequency on cores that are underutilized. Figure 2-9 provides an example of one such workload. It compares management of P-states at the socket granularity (per socket P-states, or PSPS) to the per core granularity (PCPS). On the x-axis is the system utilization (with increasing utilization from left to right), and on the y-axis is the CPU socket power. 7 This capability is not available on HSW E3 products.
Each major server processor generation is shown in a box with its major characteristics (number of supported sockets, number of cores, and process technology). Groups of processors with similar architectures have been grouped together with different shades of gray boxes. As an 32 Chapter 2 ■ CPU Power Management example, the Sandy Bridge-E5, Ivy Bridge-E5, and Ivy Bridge-E7 processors are all based on a similar architecture, which is separate from the single-socket Sandy Bridge-E3 and Ivy Bridge-E3 processors.