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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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How does Intel's RAPL estimate the power consumption

First of all, I do not know whether I should be asking this here or in the Electronics StackExchange, so please let me know if you think I should ask it there. I am interested in measuring the energy consumption of each CPU core in Intel CPUs. I…
Juan González
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Is it possible/easy to determine how much power a program is using?

Is it possible to determine or even reasonably estimate how much power a program is using? The idea being to profile my code in terms of power consumption instead of just typical performance. Is it enough to measure CPU use, GPU use and memory…
Alec Jacobson
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How to check the release date of an Android smartphone device?

I want to measure properties like energy consumption of my Android application. I know about tools like PowerTutor, but because I need a more accurate tool I want to use Qualcomm's trepn profiler. In Qualcomm's website, there is a list of devices…
Gari BN
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Measure energy consumed by a python script in Raspberry Pi (Raspbian)

I have been using pyRAPL on an Intel based computer for measuring energy on a Python encripting program, I wanted to port code to a Raspberry Pi, but I found that ARM does not provide interfaces to this API. Can anyone point me to some direction,…
cesarcastellon.sec
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Instruments not showing energy log in Xcode 11.1 and iOS 13.1.3

Instruments not showing energy log in Xcode 11.1 and iOS 13.1. I saw that the chart for energy log used to show 0/20 (example) for measuring energy, but for me it just doesn't show any data. I tried it with and without a cable and with recording…
Tine Purg
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Safe value of energy impact in iOS

I have created an iOS app and it's first phase is almost complete. Basic flow of app is that a user can add his offer. Other users can avail this offer by booking it. The number of offers keeps on increasing/updating therefore all the data in app is…
kinza
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Is Energy Usage Level shown with 4th generation iPodTouch?

In the Instruments Documentation, when talking about Energy Usage Level, it is said: Note: The Energy Usage instrument is currently supported in the iPhone 3GS and the third-generation iPod touch. I suppose this Note only talks about 3rd Generation…
angeleke
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Best way to benchmark iPhone app's battery usage?

What's the best way to benchmark an iPhone app's battery usage? I'm working on an iPhone app that uses location services and runs in the background. It seems like the battery drains significantly faster with it running, but when I try to do some…
Dean
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how to access RAPL via perf with Rocket Lake?

I have a Rocket Lake CPU(11900K), but perf does not support access power events with it yet, how can I do it? The perf events list: pastebin.com + tcsSdxUx My OS: Ubuntu 20.10 Kernel 5.12-RC6 perf version: 5.12-RC6 I can read the Rapl value with…
Edison Chan
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How to measure the power consumption in a virtual machine on a cloud environment?

I'm running a few Blockchain related containers in a cloud environment (Google Compute Engine). I want to measure the power/energy consumption of the containers or the instance that I'm running. There are tools like powerapi which is possible to do…
TharinduRanathunga
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Is it possible to measure software energy consumption with RAPL?

I've read about RAPL(Running Average Power Limit) in various different sites, but I'm still looking for an answer. I read that RAPL can measure the CPU energy consumption, or the entire system power consumption. However, my question is: If I have a…
Yaksa
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Poor DB Performance when using ORDER BY

I'm working with a non-profit that is mapping out solar potential in the US. Needless to say, we have a ridiculously large PostgreSQL 9 database. Running a query like the one shown below is speedy until the order by line is uncommented, in which…
Chris Cashwell
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Continuously detect an NFC tag on Android

From my reading and experimentation I have found that Android devices use some method to prevent duplicate reading of a tag (as discussed here). This is great for power conservation however limits the possible application of this technology. For…
Anthony Phan
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Extracting power consumption for a specific process from ubuntu powertop tool

I need to measure the power consumption of one of my algorithms and I'm using powertop utility for this purpose. However, I need to be able to extract the power consumption for my specific process from the list displayed the interactive shell in…
userDtrm
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How to export the Energy Usage result datas

I used Instruments to import the Energy Diagnostics file from Device. But how can I export the Energy Consumption result data? such as a csv file? Is it possible?
Stella
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