CODEWITHSUNDEEP
c++windowsvisual-studioperformancewinapi
Gabriel.vs
Gabriel.vs

Reputation: 56

Increase performance of Windows apps

I have imported an app from Visual Studio compiler to MinGW and I faced a problem – performance degradation. Usage of CPU increased from 30% to 100%. There is one interesting thing. If before running my app or during, I’ve run Windows Media Player – performance of my app is going to fine. CPU usage is going down till 30% and works faster (about 10 times faster). I’ve googled it and found. It relates to a service, which names as a Multimedia Class Scheduler Service (MMCSS). The main problem is: this service forks under Windows Vista and later, but I’ve tested and imported my app under Win XP. So, does anyone know how to use this feature under XP? And how Windows Media Player increases performance of my app?

Upvotes: 0

Views: 327

Answers (1)

Puppy
Puppy

Reputation: 146910

Windows Media Player changes the resolution of the system multimedia timer. Basically, this occurs when your application really should be using something like the High Performance Timer but is using the multimedia timer instead, which simply doesn't have and isn't intended to have the necessary accuracy or resolution to be a high-performance timer. As a result, any timings in your program essentially don't work as they should, which is especially bad if you're trying to sleep or block for a fixed time.

Upvotes: 2

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