Performance bottleneck in CPU vertex animation about panda3d HOT 9 CLOSED

Please attach a test case.

from panda3d.

Also, could you clarify what you mean by "terrible performance"? In PStats, which specific areas are you seeing a bottleneck in for your application? How many milliseconds are you seeing taken up by this?

Are any of the measures explained in the manual to help optimize your application having any effect, such as effectively using flatten groups?

from panda3d.

In a small environment with a few models all nodes flattened, i average around 40fps; i also don't experience any studdering during frame flips. Technical specs,

Processor: Intel Core i7-3770 CPU @ 3.40GHz
Ram: 32 GB DDR3 - 1600 MHz
Graphics Processing Unit: Nvidia GTX 1080 - Founders Edition

Pstats info:

https://gyazo.com/8d730725f190ce3fa59bb317ad65198b
https://gyazo.com/327f72423d32af6ae84bacd498326e4c

Flattening models does indeed help, but not by very much.

from panda3d.

That PStats chart is showing around ~14ms, which translates to 72 FPS. Were you seeing 40 FPS at that exact moment? If so, that leaves about 11ms unaccounted for in your chart; it would be useful to see which categories that is divided up into.

(Note, in case it was not yet clear, that you can double-click an area of the chart to subdivide it into components, which can be used to narrow down performance bottlenecks further.)

Either way, it does seem that your frame time is disproportionally dominated by Animation, which looks like a major bottleneck in your application; you could stand to significantly increase your FPS by optimizing that. This can be caused by excessive vertex animations or overuse of the RigidBodyCombiner. This gives you some indication where to look in your application - it could be, for example, that certain objects or parts of objects are being animated needlessly or with unnecessary detail.

However, an easy silver-bullet solution to address performance issues with CPU animation is to use the hardware skinning support in 1.10. It's not enabled by default since it is still experimental and requires use of shaders. You will need a recent build of Panda and these Config.prc settings to enable it:

hardware-animated-vertices true
basic-shaders-only false

And then you need to call .setShaderAuto() (or apply a custom shader that supports hardware skinning) on the animated objects, otherwise it will not take effect. If applied correctly, you should see most of the time spent in Animation melt away.

from panda3d.

I checked in a performance improvement for CPU animation, although I still recommend going the GPU animation route. Also, please note that compiling Panda3D with Eigen support enabled may drastically improve the performance of animation-bottlenecked applications.

from panda3d.

Could you provide an update on whether the suggested changes have had an impact on your application's performance issue?

from panda3d.

Hello, i've tested out a few things. It seems that older BAM files have issues when drawing geometry it could be too many Geom objects within the scene, i did convert the bam files to egg files but there still seems to be an issue with that.

from panda3d.

I'm afraid that's not a whole lot to go on. If you shared the .bam files in question, though, I might be able to help you identify the bottlenecks and give you advice on how the scene could be further optimized.

from panda3d.

I'm going to close this as a resolution has been offered for the only issue that was found in this thread. Feel free to open another GitHub issue if you identify another performance bottleneck. If you need help tracking down bottlenecks, just open a forum thread or join us on IRC and we'd be happy to help.

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