hick-ups when redrawing 1M-face object using VBO on FreeBSD

yurivict · 05-30-05, 05:13 AM

I have 6800GT card, using 7174 driver on FreeBSD 5.3-STABLE.
I am drawing an object with 1 million triangles, having normals and colors.

Using vertex arrays, ie. only submit the object once into the card, then only submit commands to draw it. 1M-face object is split into ~10 VBO arrays that are submitted separately.

Drawing itself looks fine, but other real-time programs are having hick-ups when OpenGL window is redrawn. Ex. audio-player sounds like it gets interrupted when I move any other window over OpenGL window causing it to redraw ~10 times/sec.

Seems like something very expensive is done in the background when repainting, although getrusage() always shows < 1ms CPU consumed per-redraw. Vs. 1.3s when model was initially uploaded into the card.

05-30-05, 05:13 AM	#1
yurivict Registered User Join Date: Nov 2004 Posts: 8	hick-ups when redrawing 1M-face object using VBO on FreeBSD I have 6800GT card, using 7174 driver on FreeBSD 5.3-STABLE. I am drawing an object with 1 million triangles, having normals and colors. Using vertex arrays, ie. only submit the object once into the card, then only submit commands to draw it. 1M-face object is split into ~10 VBO arrays that are submitted separately. Drawing itself looks fine, but other real-time programs are having hick-ups when OpenGL window is redrawn. Ex. audio-player sounds like it gets interrupted when I move any other window over OpenGL window causing it to redraw ~10 times/sec. Seems like something very expensive is done in the background when repainting, although getrusage() always shows < 1ms CPU consumed per-redraw. Vs. 1.3s when model was initially uploaded into the card.