the situation is complicate, but i will put it simple:
i was using d3d, i noticed that Present function cost about 10 ms, so i thought it's gpu bounded,
but the strange thing is when I open another extremely gpu-consuming program simultaneously, my program didn't seem to drop even 1 fps
what maked me even more confused is that no matter how many milliseconds I call Slee() before calling Present(), it alway cost more than 3 ms.
what happend in Presnt()? any comment will be appreciated.
Slow Present when GPU is idle?
What arguments are you supplying the Present() function?
[font="arial, verdana, tahoma, sans-serif"]Try using: Present(0,0);[/font]
It will ignore screen sync intervals, and present immediately.
[font="arial, verdana, tahoma, sans-serif"]Try using: Present(0,0);[/font]
It will ignore screen sync intervals, and present immediately.
Author
What arguments are you supplying the Present() function?
[font="arial, verdana, tahoma, sans-serif"]Try using: Present(0,0);[/font]
It will ignore screen sync intervals, and present immediately.
thanks for your reply!
I forgot to mention that I have created device with PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE,
and I did call Present with all params set to NULL
Essential reading: http://tomsdxfaq.blogspot.com/
The first article here: "Why is Present so slow?"
The first article here: "Why is Present so slow?"
Author
Essential reading: http://tomsdxfaq.blogspot.com/
The first article here: "Why is Present so slow?"
it must be vertical synchronization problem b/c the fps will never over 60. I just don't know why since I have disable it
The driver might override your application request. Go into your display adapter settings in Windows and see if it is forced to always vsync.
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