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Intel® Xeon Phi™ coprocessor Power Management Configuration: Using the micsmc command-line Interface

Previous blogs on power management and a host of other power management resources can be found in, “List of Useful Power and Power Management Articles, Blogs and References” at http://software.intel.com/en-us/articles/list-of-useful-power-and-power-management-articles-blogs-and-references.

INTRODUCTIONS: TEMPERATURE SENSORS AND THE COPROCESSOR

Intel® Xeon Phi™ coprocessor Power Management Configuration: Using the micsmc GUI Interface

Previous blogs on power management and a host of other power management resources can be found in, “List of Useful Power and Power Management Articles, Blogs and References” at http://software.intel.com/en-us/articles/list-of-useful-power-and-power-management-articles-blogs-and-references. See [LIST] below in the reference section.

HOW DO WE CONFIGURE COPROCESSOR POWER MANAGEMENT

Quick Start Guides Published for the Intel® Xeon Phi™ Coprocessor Expert User

This is a short notice to let you know that two new articles have been published for the Intel® Xeon Phi™ coprocessor: * Quick Start Guide: For the Intel Xeon Phi Coprocessor Administrator * Quick Start Guide: For the Intel Xeon Phi Coprocessor Developer The target of both of these guides is the expert user. Our assumption is that the expert user does not need to be told what to do, as he already has potentially decades of experience doing his job. Similarly, he does not need to be told how to research his area of expertise as he has done so dozens of times in the past. As these users are new to administering or developing on the Intel Xeon Phi coprocessor, they want to know only where they can find key resources, such as cluster administration guides, technical support and examples.

Power Configuration Part 0: Introduction: Yikes, there is a lot that is not documented

I was hoping to write a brief two part overview of how to configure the various power settings for the Intel® Xeon Phi™ coprocessor. It was going to be concise and brief, allowing me to get on to the next topic. Unfortunately, as I dug into the topic further, I discovered that much of it is not very well documented. I found myself essentially writing quite a bit of explanation.

As usual, I am starting off writing this as a series of blogs. At a later point, I will reformat the blogs into a more formal article with any semblance of humor removed.

Intel® Xeon Phi™ coprocessor Power Management Turbo Part 2: Hot and Cold Running Silicon

The previous blog in this series, “Intel® Xeon Phi™ coprocessor Power Management Turbo Part 1: What is turbo? And how will it affect my horsepower?” can be found at http://software.intel.com/en-us/blogs/2013/09/26/intel-xeon-phi-coprocessor-power-management-turbo-part-1-what-is-turbo-and-how-will.

TEMPERATURE DISTRIBUTION

MODERATE ACTIVITY

C-States, P-States, where the heck are those T-States?

I had an interesting question come across my desk a few days ago: “Is it still worthwhile to understand T-states?” My first response was to think, “Huh? What the heck is a T-state?”

Doing a little more research, I discovered that, yes, there is something called a T-state, and no, it really isn’t relevant any more, at least for mainline Intel(R) processors.

Let me say this again: T-States are no longer relevant!

Intel® Xeon Phi™ coprocessor Power Management Turbo Part 1: What is turbo? And how will it affect my horsepower?

INTRODUCTION AND PURPOSE:

This is the first of a series of blogs looking at Turbo: What it is and how it impacts software.

This series discusses basic concepts, terminology, how Turbo relates to thermal profiles, when Turbo is useful, and whether Turbo can impact application design.

This is a follow on to my previous series of blogs on power management.

Intel® Xeon Phi™ coprocessor Power Management Part 3: An Intuitive Description of Power States Using Stick Figures and Light Bulbs

AN INTUITIVE ILLUSTRATION OF A CORE AND ITS HW THREADS

This is the fourth installment of a series of blogs on Power Management for the Intel® Xeon Phi™ coprocessor.

Title: “Intel® Xeon Phi™ coprocessor Power Management Part 2b: Package C-States, The Details”

After gating the clocks of every one of the cores, what other techniques can you use to get even more power savings. Here’s a trivial and admittedly flippant example of what you could do: unplug the processor. You’d be using no power, though the disadvantages of pulling the power plug are pretty obvious. A better idea is to selectively shutdown the more global components of the processor in such a way that you can bring the processor back up to a fully functional state (i.e. C0) relatively quickly. Package C-States are just that, the progressive shutdown of additional circuitry to get even more savings. Since we have already shutdown the entire package’s circuitry associated with the cores, the remaining circuitry is necessarily common to all the cores, thus the name “package” C-states.
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