MicroProfiling tool reporting incorrect CPU and GPU usage

Bug Reports Engine Bugs
#1

Reproduction Steps

Use the mircoprofiler on an empty baseplate, on a PC with vsync forced off.

You can observe that each frame takes about 16ms, but the actual used CPU and GPU time each frame is not displayed anywhere.


Expected Behavior

The number should display how much time that frame the CPU or GPU actually spent occupied, and not include the time spent idle.

I would expect the microprofiler to show the duration of time that the user has any control over, not just “When the frame ended”.

Actual Behavior

Check the microprofiler times:
image

It says the CPU and GPU usage are hovering around 16ms - which is the total frame time, fine.
But if you are trying to use the profiler to work out how much “room” you have left, this number is worthless.

Issue Area: Engine
Issue Type: Display
Impact: Low
Frequency: Constantly

2 Likes
#2

I understand the problem you are facing with this, but we just use a fork from GitHub - jonasmr/microprofile: microprofile is an embeddable profiler.

We do not really modify this bit of the package so this is unlikely to change in the near future.

2 Likes
#3

It’s true we don’t modify the Microprofiler too much but I’m going to volunteer to fix it. It shouldn’t include time spent waiting for the minimum time of 16.66ms.

7 Likes