Eficiência energética

What exactly is a P-state? (Pt. 1)



A P-state is a voltage and frequency operating point





What is a P-state?

When someone refers to a P-state, generally only the frequency is talked about. For example, on my Intel® Core™ processor, P0 is 2.3 GHz, and P1 is 980 MHz. In truth, a P-state is both a frequency and voltage operating point. Both are scaled as the P-state increases. 






英特尔® 至强™ E5-2600 v3 产品家族

这些处理器基于英特尔® 酷睿™ 微架构(原代号 Haswell)并在 22 纳米制程技术上生产而成,性能明显高于上一代英特尔® 至强™ 处理器 E5-2600 v2 产品家族。 它是首款支持高级矢量扩展指令集 2.0 (AVX2) 的英特尔® 至强™ 协处理器产品家族。


  • Intel® Xeon® Processor
  • Haswell
  • Intel® Xeon® E5-2600 v3
  • Computação em nuvem
  • Computação de cluster
  • Processadores Intel® Core™
  • Computação paralela
  • Eficiência energética
  • Segurança
  • Intel® System Studio - Multicore Programming with Intel® Cilk™ Plus

    Intel System Studio not only provides a variety of signal processing primitives via Intel® Integrated Performance Primitives (Intel® IPP), and Intel® Math Kernel Library (Intel® MKL), but also allows developing high-performance low-latency custom code (Intel C++ Compiler with Intel Cilk Plus). Since Intel Cilk Plus is built into the compiler, it can be used where it demands an efficient threading runtime in order to extract parallelism. Therefore it's possible to effectively introduce multicore parallelism even without introducing it into each of the important algorithms e.g., by employing a parallel pattern called pipeline. For custom code (e.g., code that's not reused via a library), one can rely (in addition to auto-vectorization) on an extended Array Notation incl. elemental functions (kernels) to explicitly vectorize at a higher level compared to ISA-specific intrinsic functions.
  • Desenvolvedores
  • Estudantes
  • Linux*
  • Projeto Yocto
  • C/C++
  • Avançado
  • Principiante
  • Intermediário
  • Compilador C++ Intel®
  • Intel® Cilk™ Plus
  • Primitivas Intel® Integrated Performance
  • Biblioteca kernel de matemática Intel®
  • Intel® System Studio
  • embedded c programming
  • Computação paralela
  • Eficiência energética
  • Thread
  • Vetorização
  • How to use the Intel® Energy Profiler in Intel® System Studio 2015 on a Microsoft Windows* OS Target


    How to use the Intel® Energy Profiler in Intel® System Studio 2015 on a Microsoft Windows* OS Target


    Intel® System Studio 2015 now contains an energy and power profiler called Intel® Energy Profiler. Using the Intel Energy Profiler allows you to collect sleep state, frequency and temperature data, and to find the software that is causing unwanted power use. This article provides an overview of the Intel Energy Profiler on a Windows* OS target.


  • Microsoft Windows* 8.x
  • Windows*
  • Intermediário
  • Intel® Energy Profiler
  • Ferramentas de desenvolvimento
  • Eficiência energética
  • Assine o Eficiência energética