power management

Intel® Xeon Phi™ coprocessor Power Management Pt 0: Introduction and inquiring minds

So exactly which power states exist on the Intel® Xeon Phi™ coprocessor? What happens in each of the power states? Inquiring minds want to know. And since you are, no doubt, aggressively involved in high performance computing (HPC), I am sure you want to know also.

Writing Energy-Efficient Windows* Store Applications for Mobile Devices - Impact of CPU Utilization on Platform Power

Writing Energy-Efficient Windows* Store Applications for Mobile Devices (PDF 753KB)

 

1. Introduction

Mobile devices are everywhere today, like smartphones, tablets, UltrabookTM devices, etc. All of them are powered by batteries. Battery life time is critical to end users because everyone wants the battery to last as longer as possible.

  • Microsoft Windows* 8
  • Windows*
  • C/C++
  • Intermedio
  • Energy Efficient
  • cpu utilization
  • Platform Power
  • Processor Power State
  • power management
  • Sleep State
  • applications
  • Mobile Devices
  • Microsoft Windows* 8 Style UI
  • Consumo eficaz de energía

    • For Ultrabook developers, with great power comes great responsibility

    Enviado por (no verificado) el

    This following article was subsidized by Intel and authored by Zebra Partners.

    Often considered to be the Achille's heel of portable devices, power management has come a long way. The new breed of Ultrabook™ PCs have pushed battery life and thermal design to a new level. We spoke with Dr. Mike Pearce, Intel Community Manager for Power Efficiency.

    Q: Ultrabooks already have fantastic battery life by design, why do I need to worry about it in my application?

  • Windows*
  • power management
  • Consumo eficaz de energía

    • Performance-power in client applications: looking at JouleSort

    Below, I've included my usual summary of any paper I read. Yep, I go through this trouble with everything, no matter how trivial. Of course, usually, this summary is private, sequestered away behind vales of security, not the least of which is the fact that no one in their right mind would be interested in these summaries.

    I’m posting this as a good starting point. It’s a well written paper (in my opinion) and a very enjoyable read. (This should show you how much of a life I have.)

    A useful power-performance metric (Part IIa, the goal)

    GOALS AND THE ULTIMATE QUESTION

    What is our ultimate goal? What do we want to do with our life? Is life important or just a meaningless exercise in futility? These are very important questions but generally irrelevant to this discussion.

    So what is our ultimate goal here in this series of articles? We want to come up with a useful measure of power-performance for an application, such as Joules per instructions for a given app. But as we will see, finding this answer is much less clear cut than it first appears.

    Performance per Watt: Hey, I already know it’s important, don’t I? (The intro, part I)

    What is performance per Watt?

    Performance per Watt is pretty straight forward when you first look at it. Then you begin to sink in the quicksand you’ve blithely walked into. The panic sets in as you sink lower and lower. Eventually you decide to ignore the whole complicated mess and go back to saying to yourself how straight forward it is. Of course, deep within your heart of hearts, you know that it’s not.

    For most of us, performance per Watt is nothing more than how much our computer can get done on a given battery charge.

    Performance per Watt: Hey, I already know it’s important, don’t I? (The preface)

    One of the big advantages of blogging is that I can write about anything I want, as long is it doesn’t violate any Intel conduct rules, refer to any competitors, reveal any confidential information, insult anyone, compliment people (yeah, I said compliment), and so on and so on and so on. Outside of that, I have a free hand.

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