Dear ARM forum,
I am using the DS-5 Streamline to analyze my application performance on ARM MALI 400.
I am seeing that, GPU vertext processor activity for 3 milliseconds followed by a in-active period of 13 milliseconds then followed by 34 milliseconds GPU pixel proessor activity.
Questions:
1. I am trying to under stand , why there a so much of in-active period? How can I analyze this period for the performance impact?
2. Streamline has provided many performance measuring events, but there is a very poor documentation on , what is this event capturing and how to make use of it for GPU performance analysis?
3. I want to measure the GPU Vertex processor performance in - How many triangles it is processing in one frame, how much time it consumed for that.
GPU Pixel processor performance in - How many pixels processed in one frame,how much time it consumed for that.
4. Is there a document to discuss on analyzing all the events for performance analysis.
Thanks,
Ravinder Are
Hi Michael and Peter,
Did you get chance to look in to the streamline log I shared.
I am seeing in a frame VP has some activity followed by some idle time and followed by PP has some activity.
Here my questions are,
1. why VP and PP activity is not parallel, why one after another?
Am I doing something wrong where the parallelism is not possible?
2. Why there is a idle time in my application ? why cant PP start immediately?
I am not using the Vsync, and I have double buffering in my processing.
3. I am running QT based OpenGLES2.0 Application with a simple Vertex shader and a simple Fragment Shader.
I need your support in analyzing .
As I said before, Streamline isn't going to help answer questions about idle time. It's a performance profiler - you can't profile "nothing running" - all of the counters are zero.
The cause of (1) and (2) are probably the same thing. Serialization means idle time and things not overlapping.
Usual suspects:
Less likely suspects:
HTH, Pete
Thanks Peter Its useful information