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Questions tagged [energy]

Question regarding energy consumption of hardware of different instruments such as cpu's, cell-phones etc.

Question regarding energy consumption of hardware of different devices such as cpu's, cell-phones etc. Related tags are , .

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What units of power/energy consumption have Energy Levels in the Energy Instrument for an iOS app?

I'm actually measuring the energy consumption of my iOS application through the Energy instrument. I want to know the measure (e.g., in Joules) of the energy levels given by the Energy Instrument for an iOS app. Is there any relationship between the…
airin
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What's a good alternative to PAUSE for use in the implementation of a spinlock?

I am working on making a fiber-based job system for my latest project which will depend on the use of spinlocks for proper functionality. I had intended to use the PAUSE instruction as that seems to be the gold-standard for the waiting portion of…
Zacary Wengdom
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Performance Counter for DRAM Per-Rank Memory Access

I have an Intel(R) Core(TM) i7-4720HQ CPU @ 2.60GHz (Haswell) processor. I need to retrieve the number of accesses to each DRAM rank, over time, to estimate its power consumption. Based on page 261 of the chipset documentation (i.e., Datasheet,…
TheAhmad
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How do I calculate how much CPU, RAM, energy is required to run a specific Python program?

Suppose we want to find out how much energy, CPU and RAM are being used in Python to find out the factorial of a positive integer. I used the code below but it is not working. MWE: from __future__ import print_function import…
BSFU
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Power Consumption for multiplying two 64 bit numbers

Can anyone help me to find the power consumed in an ( i7-6700 CPU@3.4 GHz, 4 cores, 8 logical processors) while multiplying two 64 bit numbers and adding two 64 bit numbers? Is there any specific document/link where I can find that ? Also what is…
Tanushree Banerjee
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Is there a way to get power consumption in ARM CPUs?

Intel CPUs from SandyBridge and newer have MSRs that allow to get an accurate energy consumption (Measured in micro joules). These are visible to the kernel (RAPL - Running average power limit). Is there an equivalent option for ARM CPUs?
amanusk
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How to calculate total energy consumption using Cooja

I'm working with wireless sensor network lead to evaluate its performance in my work. I want to measure the latency and total energy consumption to find the remaining energy in each node. So my problem is that I have some values of tx rx cpu…
Ayoub Benayache
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How to Activate Battery Module in omnet++

I'm trying to use the InetSimpleBattery module to collect energy data of the simulation I'm running. Whenever I run a simulation, energy values are always constant (no energy drain). So I tried to modify the following parameters in the ini…
Shaikha TheGreen
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energy flow in when charging a mobile or Tablet

I would like to know whether it is possible to measure how much energy is flowing in a mobile device (IOS or Android) when it is charging ? In watt per Hour or MilliAmperes per Hour for exemple. Basically I would like to measure how much electricity…
G.D.
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xCode7 how to access "energy gauge"?

I'm looking at a list of new features of xCode7 and see that there's a new "energy gauge" tool. However, I don't see energy gauge in the debug session side panel (xCode Version 7.0 beta 5 (7A176x), deployed on iOS 8.4.1 device): I'm expecting to…
Alex Stone
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how to calculate power consumption on an Android mobile that uses wifi?

I have implemented a routing protocol on an Android 1.6 mobile that uses wireless (ad-hoc) network in order to exchange messages. Now I would like to evaluate it under an energy consumption point of view, the base would be to try to calculate the…
Marco
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How are apps listed on the OSX "Apps using significant energy" list?

I created a small OSX app that takes a picture on the webcam every hour. However, as soon as the first webcam picture is taken, the app gets listed in the dreaded "Apps using significant energy" list under the MacBook battery menu. It then remains…
Stan James
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How to measure energy consumption of a process in linux without any external hardware meter?

I had tried googling for it and had found MSR_PKG_ENERGY_STATUS under RAPL but unfortunately it has support for only newer processors like Sandy Bridge, Ivy Bridge etc. Is there any other way to get it in older processors? This is my processor :…
Saravanan Setty
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How to measure the energy consumed by my Android app in a certain moment

I have been trying to figure this out since couple months ago because I'm working on my thesis, but unfortunately I have not been able to make it. What I'm doing is a performance analysis regarding energy consumed by an application running an…
KinGPinG
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Android Health/Energy Bar

I need to make an energy bar in android for a game- it represents fuel consumption. I am doing this in eclipse. I have tried using the progress bar in the palette but I cant seem to understand how I would make the bar essentially start at 100% and…
user1196933
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