Monitor The Power Consumption Of Your System
We all are excited about saving energy and serving the environment but we don't realize
that we can start from the things right beside us, for example, the computer. There are a lot of things going on in a computer which keeps consuming power. Based upon the load, the consumption could be high or low, but even when you think that your computer is doing nothing, there could be a hundred of things going on(some could be useless) that consume/waste energy. This specially sucks when your laptop is on battery power. PowerTop, a project to save power on Intel platforms running Linux, lets you know the state of your system w.r.t. power consumption, a sorted list of the most contributing culprits(apps/interrupts) and some suggestions to make your system more eco-friendly.
Joulemeter is a free utility from Microsoft Research which is designed to determine the power consumption of your system. It tracks HDD, monitor, motherboard, CPU power consumption by calibrating each unit strength. The process includes a complete check of computer resources which primarily includes CPU utilization and display brightness.
For calibrating the resources with precision, it is recommended to run your system on battery (in case of laptop). Run the calibrator to find out the related information. Input requirements are minimal, you can specify the monitor setup and server.
Not just for increasing battery life, powertop can help you figure out bugs or flaws in the system and fixing them can help you save a lot of energy and in case of large data centers with thousands of machines, it could directly result in significant reduction in costs of electricity and chip heating issues.
Once Calibration test is finished, you can now run the Joulemeter application that lists down the test results depending upon different scales. Power Consumption section refers to Base Power, CPU, Disk, Monitor and accumulative power that needs to run the system. The Statistics section displays Time Slept and Time Awake.
The application serves in finding out the minimal power resources that you need to run your system. It sits in the system and updates the statistics along with other power
TOSHIBA PA3166U battery consumption relevant information. It runs on all Windows based OS, our testing was done on Windows 7 x86 system.
Download and install Powertop
You can directly download and install it from your Distribution's repositories.
Please note that, the distribution may contain, an older version. Ubuntu 10.10, has v1.13 which is quite old considering the latest being v1.7. You can install them directly from the source to get the recent version.
Once installed, run it in a terminal.
Here is a brief explanation of the output. The c-state shows the amount of time processor has spent in each of the 4 states. The processor is in states 1-4 when its idle. The longer it stays in higher states, C3/C4, the less power is being consumed. And Except in state C0, it doesn't execute instructions in any other.
Wake up per second is another criteria to check the power savings, the lower the better. Next is the list of top contributors (processes etc.) in order of power
TOSHIBA PA3259 battery consumption. Lastly, it might even suggest you some tips and tricks to save some power.
When on battery, using ACPI it will show the state of the battery, hours remaining etc.
Because of Powertop, many crucial bugs in both kernel and various applications have been fixed that wasted a lot of power.
by: yoyoyuru
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