I developed a program in c++ and when I run it in windows XP it uses all the available CPU to 100% of usage but when I run the application in windows 7 the app could hardly makes it’s way to 40% even by setting the task to real-time or high priority one in taskbar is there a way that I could force the OS to let my application use maximum available CPU like what was in winXP in my code. I mean something like APIs or a library.
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This is more than likely due to you having more than one core. In order to use 100% of your CPU you may need to have multiple threads created.