Evie Summers
It is not possible to run applications when a computer is in sleep mode. However, there are workarounds to prevent a computer from sleeping while a function is running. For instance, if you are running a Jupyter notebook locally on Windows, you can set the sleep/screen saver to the time you need for your model to work, or set it to never go to sleep. On a Mac, you can use the command line utility caffeinate to keep the machine from sleeping until a specific script runs.
| Characteristics | Values |
|---|---|
| Is model training possible while the computer is asleep? | No, the training will be suspended and will resume when the computer wakes up. |
| Workarounds for Windows | Set the sleep/screen saver to the time needed for the model to work or set it to "never" go to sleep. |
| Workarounds for Mac | Use "caffeinate" in the command line to keep the machine awake until a script has run. |
| Workarounds for Jupyter Notebook | Use "caffeinate -t 3600 &" to keep the notebook awake for an hour. |
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What You'll Learn
Keeping a Jupyter notebook awake while the PC sleeps
If you want to keep a Jupyter notebook awake while your PC sleeps, you can try the following methods:
Prevent Windows from Sleeping
You can change your Windows power settings to prevent your computer from sleeping. This can be done by setting the sleep/screen saver settings to the time needed for your model to work, or by setting it to "never" go to sleep. Once your model training is complete, you can change the settings back to your preferred configuration.
Use Caffeinate
Caffeinate is a command-line utility that can be used to keep your machine from sleeping. In Jupyter, you can prepend a bang symbol before the command: !caffeinate. If you know how long your process will take, you can specify an explicit time argument, for example, caffeinate -t 3600 &. The time is in seconds, so 3600 represents an hour. The ampersand sends the process to the background, allowing you to type new commands.
Use Powermanagement.py
You can also use a Python script called powermanagement.py to prevent your computer from sleeping while a function is running. Save the code from the GitHub link provided in the references below to a file called powermanagement.py. Then, import it into your Jupyter notebook and use it with a decorator, as shown in the code snippet below:
Python
From powermanagement import long_running
@long_running
Def train_my_model():
# call the long training process here...
Train_my_model()
This will keep your Windows PC awake until the function finishes executing, after which it will go to sleep again.
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Preventing Windows from sleeping while a function is running
If you want to prevent your Windows computer from going to sleep while a function is running, there are several workarounds and methods you can try.
Firstly, you can adjust your power settings. If you are using Windows 10, you can set the sleep/screen saver to the time needed for your model to work. Alternatively, you can set it to "never" go to sleep, and then change the settings back when you are done. This method does not require any additional software or technical knowledge.
Another method is to use a utility called "caffeinate," which is a command-line utility. In Jupyter, you can prepend a bang symbol: "!caffeinate". If you know how long the process will take, you can use a time argument, for example, "caffeinate -t 3600 &". This will keep your computer awake for 3600 seconds (1 hour) and the ampersand will send the process to the background, allowing you to type new commands.
Additionally, there are other software tools that can help prevent your Windows computer from sleeping. For instance, Process Lasso has a feature called "Prevent Sleep Rule," which can be applied to the display only or the entire PC. It uses the SetThreadExecutionState API, called by its 'Governor' service.
Finally, you can try using PowerShell or batch scripts to keep your Windows system awake. For example, you can use the KeepDisplayOn and KeepSystemOn scripts, which are available on GitHub. These scripts use the SetThreadExecutionState API call to tell Windows not to sleep while a specified program is running.
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Making a Mac continue working on a task after sleep mode
It is possible to make a Mac continue working on a task after sleep mode. Firstly, it is important to distinguish between 'display sleep' and 'computer sleep'. When a Mac enters display sleep, the screen turns off, but all computer functions continue to run in the background. Computer sleep, on the other hand, pauses most system functions and puts the Mac into a low-power state to save energy.
To prevent a Mac from entering computer sleep, you can change the default sleep settings. Here are the steps to do so:
- Click on the Apple logo in the upper-left corner of the screen.
- Click on 'System Settings'.
- Choose 'Battery' in the sidebar.
- Find the line "Turn display off on power adapter when inactive" in the right panel and click on the drop-down next to it.
- Set the sleep time by selecting the desired option, which can range from one minute to three hours, or 'Never'.
- Find the line "Turn display off on battery when inactive" and repeat step 5.
Alternatively, you can use third-party apps such as Lungo and OneSwitch to customise your sleep mode settings without having to dig through the System Settings. These apps are available on Setapp, which offers a free seven-day trial.
Another way to keep your Mac awake is by using the built-in command-line utility called 'caffeinate'. To use it, precede the terminal command with 'caffeinate', for example, 'caffeinate python'. You can also specify a time argument, such as 'caffeinate -t 3600 &', which will keep the Mac awake for 3600 seconds (1 hour).
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Using caffeinate to keep a machine from sleeping
If you want to prevent your computer from going into sleep mode, you can use a utility called Caffeinate. It is a command-line utility that prevents a system from sleeping altogether or idle sleeping.
To use Caffeinate, you can open the terminal and enter the command caffeinate followed by the script you want to run, for example, caffeinate python spam.py. If you know how long the process will take, you can specify an explicit time argument, for example, caffeinate -t 3600 &. The time is in seconds, so this example is for an hour. The ampersand sends the process to the background, allowing you to type new commands.
On macOS, you can use the '-s' option to prevent the system from sleeping altogether, but this only works when the computer is plugged in and not running on battery power. The '-i' option is for idle sleep, which occurs when the system has not been used for a certain period.
It is important to note that even if documentation states that caffeinate should exit upon exiting the terminal, it may not always do so. In such cases, you can press Cmd + W and click Terminate to decaffeinate.
Additionally, if you are using a Windows system, you can set the sleep/screen saver to the time you need for your model to work, or you can set it to "never" go to sleep. Once you are done, you can change the settings back to your preferred configuration.
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Running an application while a computer is in sleep mode
When a computer goes to sleep, the RAM remains "awake" and continues to draw power, while the rest of the computer shuts down. This means that the hard drive will not process anything, and any applications installed on it will stop running. Therefore, it is generally not possible to run applications while a computer is in sleep mode.
However, there are workarounds to keep a computer from sleeping and to prevent applications from being interrupted. On Windows, one option is to disable sleep mode, hibernation, and hybrid sleep, and instead set the screen to turn off after a certain amount of time. This will allow programs to continue running in the background. Alternatively, for local Windows 10, you can set the sleep/screen saver to the time needed for your model to work, or set it to never go to sleep. Once you are done, you can change the settings back.
For a Jupyter notebook, you can use the command line utility "caffeinate" to keep the machine from sleeping until a specific script runs. For example, in a shell, you can try "caffeinate -t 3600 &", which will keep the computer awake for an hour. The ampersand sends the process to the background so that you can type new commands before it finishes.
For Java applications, you can create a simple Windows .bat script that will call your program from the command line. Then, create a Windows Scheduled Task and specify how often you want the task to be executed. Make sure to select the option to "Wake the computer to run this task" and point the scheduled task to the .bat file.
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Frequently asked questions
No, model training will be suspended if your computer goes to sleep.
If you're using a Windows machine, you can set the sleep/screen saver to the time you need for your model to work, or set it to "never" go to sleep. Alternatively, you can use the command line utility, caffeinate, to keep your machine awake.
You can use the caffeinate python script to prevent your Mac from sleeping until your script finishes running.
