Odd delay before save Tweet

[HadleyRille]

I'm seeing a bit of odd behavior that I'm having trouble understanding. I have two machines set up to render in Octane. One has two Nvidia RTX 2080 Ti cards, and the other has three of the same card.

Both machines are rendering different cameras in the same scene, so I wouldn't expect the render times to be exactly the same, but what's odd is that the denoising and saving is very different between them. The first machine with the two 2080s renders the frame in about 4 1/2 minutes, meaning that going from 0 to the sample limit takes that time. I presume that Octane is then running the Optix denoiser, saving the frame, and loading the geo for the next frame, and that part takes around 25 seconds.

What I'm seeing on the other machine, the one with three 2080s, is that render time is around 3 1/3 minutes, but denoising, saving and moving to the next frame is about 4 minutes.

The render settings, resolution, etc. are identical between the machines. It's not clear exactly what's going on, since there aren't any onscreen progress updates, but I'm surprised that my faster machine it taking somewhat longer per frame.

Any suggestions on how I might debug this?

Thanks!

[face_off]

Which release of the plugin are you using please?

Paul

[HadleyRille]

Both machines are running OctaneRender Studio 2019.1.4 (6000400)

I do see that the Nvidia driver is different between the machines. The two card machine that has been seeing better performance has GeForce RTX 2080 Ti version 441.66, and the one that is taking longer has 442.19.

[face_off]

Both machines are running OctaneRender Studio 2019.1.4 (6000400)

I do see that the Nvidia driver is different between the machines. The two card machine that has been seeing better performance has GeForce RTX 2080 Ti version 441.66, and the one that is taking longer has 442.19.

Can you tell me what the release number of the Octane plugin is please?

Paul

[HadleyRille]

Help->kit version-> displays OctaneRender version 2019.1.4.155 on the faster machine and 2019.1.4.154 on the slower one.

I should probably update the slower one to 155.

[HadleyRille]

Updated the slow machine to 155. Still seeing the slow post render.

[face_off]

The version of the plugin you are running (155) is incorrectly saying the render is complete when there are still Info pass samples to render. So this might be making it hard for you to track the problem. Release 158 corrects this problem. You could also export the scene to ORBX and do a test render on both PC's with Octane Standalone to see if the issue is happening there too.

Paul

[HadleyRille]

Interesting and perplexing development:

After the last message, I figured I'd just let the renders go given that I have a deadline and getting them done slower that I'd hoped wasn't the end of the world.
I checked on the progress this morning and was surprised to see that it was now taking ~45 minutes/frame. I killed the render and rebooted the machine, reopened the scene and started it up again. Now the renders are back down to what I would expect from the 3 GPU machine. They're about 2/3 the time of the 2 GPU machine.

No software change, just a reboot.