rainer
09-27-05, 08:35 AM
my application, drawing several full screen/head windows (doing OpenGL rendering), behaves very diverse (performance). Popup a first full screen/head window on monitor 1 one display() cylce take about 2ms and swapBuffers() take about 7ms.
Popup of the same window in parallel on head 2 will take about 60ms for both above mentioned operations. 60ms for a simple swapBuffers() is horrible slow.
Any further window is slow too.
Popup the first window on head 4 all successive windows on any head will take about 60ms for display and swap.
Why is the performance dependend on the head the window is using ?
I am using a NVIDIA Quardro4 NVS 400 on WXP SP2 and Nvidia driver 7.7.5.6
Popup of the same window in parallel on head 2 will take about 60ms for both above mentioned operations. 60ms for a simple swapBuffers() is horrible slow.
Any further window is slow too.
Popup the first window on head 4 all successive windows on any head will take about 60ms for display and swap.
Why is the performance dependend on the head the window is using ?
I am using a NVIDIA Quardro4 NVS 400 on WXP SP2 and Nvidia driver 7.7.5.6