OTOY Forums

I'm on MacOS High Sierra, latest CUDA driver. 12-core Mac pro with GTX 980Ti.

With the earlier builds of v4, Octane was quite stable - but the the last few builds of 3.08 and 4.x have been a disaster on both R19 and R20. I get continual constant Render Failure!!! or it starts copying the scene file and ever ends, so I have to force quit. I'm not even pushing it with large or complex scenes (though if I do its almost certain to crash).

I'm pretty much done with Octane this point. I spend more time force-quitting and restarting than I do rendering. I'd love to hear if any one else is using the Mac version or it's just me! I've included the Log details but I doubt it will help much, it never seems to.

Anyway, it's back to the C4D native renderer for me.


init Octane Api...
Activation time=11.186 sec.
--------------------------- EXPORT LOG ---------------------------
Export materials time= 12.916 ms
Collect objects time= 3.397 ms
Mesh creation time = 9.018 ms.
Total export Time = 54.039 ms
VRAM used/free/max:614Mb/537Mb/6Gb Out-of-core used:0Kb total used RAM:16.053Gb
--------------------------- EXPORT LOG ---------------------------
Export materials time= 9.982 ms
Collect objects time= 6.07 ms
Mesh creation time = 7.682 ms.
Total export Time = 37.859 ms
VRAM used/free/max:614Mb/537Mb/6Gb Out-of-core used:0Kb total used RAM:16.03Gb
OCT:CUDA error 700 on device 0: an illegal memory access was encountered
OCT: -> kernel execution failed(kernel25)
OCT:CUDA error 700 on device 0: an illegal memory access was encountered
OCT: -> failed to launch kernel(kernel34)
OCT:device 0: direct light kernel failed
----------------------------------------------------------------------------------------
<<< Render failure detected!!! >>>
Please check render statistics to solve the problem.
MB:0/0 ST/MOV:0/97 Nodes:218 Tris:290k DispTris:6k Hairs:0 Meshes:97
Device:0 TotMem:6Gb rtData:604Mb film:11Mb geo:257Mb node:10Kb tex:0Kb unavailable:5.062Gb
VRAM used/free/max:872Mb/87Mb/6Gb
Free VRAM is too low!
Try to decrease polygon counts and use out-of-core for textures.
Use 'render instances' when it's possible.'
--------------------------- EXPORT LOG ---------------------------
OCT:CUDA error 700 on device 0: an illegal memory access was encountered
OCT: -> failed to unload module
OCT:CUDA error 700 on device 0: an illegal memory access was encountered
OCT: -> failed to create link
OCT:device 0: failed to create OSL compile context:
OCT:device 0: failed to compile module 0
----------------------------------------------------------------------------------------
<<< Render failure detected!!! >>>
Please check render statistics to solve the problem.
MB:0/0 ST/MOV:0/97 Nodes:3 Tris:0 DispTris:0 Hairs:0 Meshes:0
Device:0 TotMem:6Gb rtData:604Mb film:11Mb geo:257Mb node:10Kb tex:0Kb unavailable:5.062Gb
VRAM used/free/max:872Mb/87Mb/6Gb
Free VRAM is too low!
Try to decrease polygon counts and use out-of-core for textures.
Use 'render instances' when it's possible.'
Export materials time= 363.135 ms
Collect objects time= 51.613 ms
Mesh creation time = 160.733 ms.
Total export Time = 709.241 ms

Sounds like you may have problems on gpu setup. Have you tried on single gpu to render. Even physically removing every gpus and tested.?

Hi,
from the log you have ~5GB on unavailable VRAM, difficult to work with only 1GB of VRAM. How many monitors have you attached to 980ti?
Please, go to Apple menu About this Mac and share a screenshot with us, thanks.
Then go to System Preferences/CUDA and share another screenshot, thanks.
ciao Beppe

bepeg4d wrote:Hi,
from the log you have ~5GB on unavailable VRAM, difficult to work with only 1GB of VRAM.

Code: Select all

unavailable:5.062Gb

How many monitors have you attached to 980ti?
Please, go to Apple menu About this Mac and share a screenshot with us, thanks.
Then go to System Preferences/CUDA and share another screenshot, thanks.
ciao Beppe

Good point! Your system only have 87Mb free VRAM for render accordingly to your log output. See VRAM used/free/max:872Mb/87Mb/6Gb. You should care about this kind of information. I believe you should have a sufficient amount of VRAM to let the renderer play fine. Otherwise, it's out of the game!

I don't understand: it's a 6GB card (6144MB), and I'm using a single Apple Display. There's only one GPU. I'm not loading massive scenes, so where's the VRAM gone?
Also, I've reverted back to V4-RC2-R1 and it seems to be behaving itself again.

I've updated to the last V4 on R19 and to seems to be working okay again. I have no idea what was going then – unless I had run an app that used the GPU VRAM and it hadn't cleared. In tests, the same scenes are using around 2GB, with 1.6GB free (out of core is 0/4GB – do you need to activate OOC, or does it do it automatically?).

I guess I'l need to keep an eye on VRAM usage from now on.

Weezer wrote:I've updated to the last V4 on R19 and to seems to be working okay again. I have no idea what was going then – unless I had run an app that used the GPU VRAM and it hadn't cleared. In tests, the same scenes are using around 2GB, with 1.6GB free (out of core is 0/4GB – do you need to activate OOC, or does it do it automatically?).

I guess I'l need to keep an eye on VRAM usage from now on.

You have to activate by hand!

Ah, it is activated. RAM usage is 4GB; GPU head room is 512Mb.

Get another video card, and use it to drive the monitor and keep the 980ti for Octane only, or do what I did and buy a 1080ti with an external power supply, use that for Octane and the 980ti for the monitor.

It makes a big difference when you have a dedicated Octane card.