Get current CPU, RAM and Disk drive usage using Qt

Question

Hey,

The question speaks for itself : is there a convenient wrapper for system specific function in Qt, so I can tell how much is the current resources usage ?

I want to execute some expensive task when the system is idle. For your information (I might need to put that in another question), I want to calculate the content hash of a file. I thought of doing it by streams instead of a basic readAll followed by a call to QCryptographicHash, but didn't find how to do it yet, so i'm stuck with reading the whole file and calling hash()...

Answer 1

You need to use platform specific code to detect resource usage.

For fastest file access to calculate hashes, use memory mapped files (QMemoryFile)

Answer 2

To get the system data in Linux, you can read '/proc' and display info.

For Windows, you may want to look at WMI queries.