"S" indicates that the status of process is "Sleeping". It happens when a process is waiting for an event or resource.
Try "lsof" command to find out list of files opened by MATLAB. It can help you identify what a process is waiting for.
sudo lsof -p <PID>
You can get the <PID> of MATLAB process using top command output.
By examining the output, you can determine if MATLAB is waiting for a file or resource, which might be causing it to sleep.
For example, you might find a large text file. Suppose MATLAB is waiting for that to be available while the file is locked by another process. This can cause the MATLAB to go into sleep state as it will wait for the file to be available.
As a solution to avoid sleep state in above example, you will need to make sure that the text file is available and not locked by another process.
Let me know if this information helps you. If it does not help, please share the script which you are running.
