![]() The part of the package outside the cores is called the uncore or system agent.Each core typically has hyper-threading, which means it contains two logical CPUs.Xeon) typically have two or more packages. These are part of the actual processor that you buy from Intel. The processor has one or more packages.The following diagram (from the Intel Power Governor documentation) shows how machines using recent Intel processors are constructed. reducing) the power consumption caused by Firefox and Firefox OS. As a result, it is worth optimizing (i.e. Web browsers are popular applications and can be power-intensive, and therefore can significantly affect battery life. That in turn depends on the software running on the device. In the context of computing, a fully-charged mobile device battery (as found in a laptop or smartphone) holds a certain amount of energy, and the speed at which that stored energy is depleted depends on the power consumption of the mobile device. Strictly speaking, such a computation gives the average power but this is often referred to as just the power when context makes it clear. by dividing an energy amount by a non-infinitesimal time period. In SI units, energy is measured in Joules, and power is measured in Watts, which is equivalent to Joules per second.Īlthough power is an instantaneous concept, in practice measurements of it are determined in a non-instantaneous fashion, i.e. ![]() It is equivalent to an amount of energy consumed per unit time. In physics, power is the rate of doing work. ![]() It serves as a starting point for anybody doing power profiling for the first time. This article covers important background information about power profiling, with an emphasis on Intel processors used in desktop and laptop machines.
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