问题描述:

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.

网友答案:

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.

网友答案:

If your app is using any kind of IO, and that IO is messed up in XP (bad driver and/or something else), that might be causing your app to spin the CPU entirely.

7 is maybe better optimized in such areas, so it frees the CPU until slow (disk, network) stuff is completed.

网友答案:

Also depending on what this thread is doing and how often it spends time off the processor (Sleep, object waits) can be a factor, but MK pretty much summed it up for you. You could also have a look here:

http://msdn.microsoft.com/en-us/library/windows/desktop/ms686277%28v=vs.85%29.aspx

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