100% CPU on simple program?

[Makuto]

I fixed this problem a while ago, but it came up again in a different form with different source code.  The window source is below:

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sf::RenderWindow App(sf::VideoMode(800, 600), "Dodger");
    App.UseVerticalSync(useVertSync);
    App.SetFramerateLimit(frameLimit);
use vert sync is true and framelimit is set to 45.  The program runs on an average amount of CPU, but it acts like a program running on 100% CPU (mouse flickers, disappears when you don't move it, boxes appear by mouse, etc.).  This started occurring all-of-the-sudden.  All of the images move quickly and at a normal pace.

[strongdrink]

my code isn't from the tut, it's my own

[Makuto]

Mine is now too, but the problem arised after.  To tell you the truth, I only said that I was using the tutorial code so I wouldn't have to post mine, cause I'm lazy...

[strongdrink]

I just stopped thinking about this problem for a while.. but this morning it was really bugging me.. SO! I tried several things... and...

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    sf::Sleep(0.01);


Doesn't seem to have any effect on speed AND the CPU goes to 0%!

w00t!

[OniLinkPlus]

I just stopped thinking about this problem for a while.. but this morning it was really bugging me.. SO! I tried several things... and...

Code: [Select]


    sf::Sleep(0.01);


Doesn't seem to have any effect on speed AND the CPU goes to 0%!

w00t!

Or you could look at the second post in this thread. Your technique is equivalent to SetFramerateLimit(100);
The 100 comes from 1/0.01.

[strongdrink]

No I tried that, it didn't work either.. I think it might be a hardware problem

[OniLinkPlus]

No I tried that, it didn't work either.. I think it might be a hardware problem

I doubt it. I'm 99% sure that SetFramerateLimit uses sf::Sleep (although I haven't checked, to be honest).

[strongdrink]

I don't think so... when i do

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  App.SetFramerateLimit (0x30);


For instance.. it does nothing to my CPU.. but when i do

Code: [Select]


    sf::Sleep(0.01);


it lowers it to 0! it's wacked.

[OniLinkPlus]

I don't think so... when i do

Code: [Select]


  App.SetFramerateLimit (0x30);


For instance.. it does nothing to my CPU.. but when i do

Code: [Select]


    sf::Sleep(0.01);


it lowers it to 0! it's wacked.

Why are you using hexadecimal in SetFramerateLimit?

Also, I was correct. This is how SFML handles FramerateLimit:

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if (myFramerateLimit > 0)

    {

        float remainingTime = 1.f / myFramerateLimit - myClock.GetElapsedTime();

        if (remainingTime > 0)

            Sleep(remainingTime);

    }
In other words, using SetFramerateLimit has the exact same effect as your Sleep method.

[strongdrink]

i use hex because i believe it compiles faster.. dunno i guess i just like it

weiiiirdd... oh well as long as both of them work in the same way it doesn't matter i guess lol