RC2: default cube with blackbody crashes Blender #52589

New Issue

mathieu menuet · 2017-08-30T13:50:36+02:00

mathieu menuet commented

2017-08-30 13:50:36 +02:00

System Information
Win7 X64 with RX 480 or RX VEGA and 17.8.2 driver

Blender Version
Broken: 2.79RC2

Short description of error
Blender crashes when compiling the kernel when a blackbody node is added and not even connected

Exact steps for others to reproduce the error
Open attached file and hit F12
crash opencl.blend
By the way, why an unconnected node that is removed by the tree cleaning operation triggers a group level of 3? Doing the cleaning (including unfolding) first would prevent using a suboptimal kernel would diminish the number of kernel recompiling.

**System Information** Win7 X64 with RX 480 or RX VEGA and 17.8.2 driver **Blender Version** Broken: 2.79RC2 **Short description of error** Blender crashes when compiling the kernel when a blackbody node is added and not even connected **Exact steps for others to reproduce the error** Open attached file and hit F12 [crash opencl.blend](https://archive.blender.org/developer/F742440/crash_opencl.blend) By the way, why an unconnected node that is removed by the tree cleaning operation triggers a group level of 3? Doing the cleaning (including unfolding) first would prevent using a suboptimal kernel would diminish the number of kernel recompiling.

mathieu menuet commented

2017-08-30 13:50:36 +02:00

Changed status to: 'Open'

mathieu menuet commented

2017-08-30 13:50:36 +02:00

Added subscriber: @bliblubli

Bastien Montagne commented

2017-08-30 17:08:34 +02:00

Added subscribers: @MaiLavelle, @mont29

Mai Lavelle was assigned by Bastien Montagne

2017-08-30 17:08:34 +02:00

Bastien Montagne commented

2017-08-30 17:08:34 +02:00

@MaiLavelle can you check this one? you are our OpenCL expert I think. ;)

Mai Lavelle commented

2017-08-31 06:36:11 +02:00

The crash appears to be coming from the driver, AMD has been notified.

Also node graph optimizations are another issue, it would be best to keep that separate from this report. Patches are welcome if you have a way to improve that area.

The crash appears to be coming from the driver, AMD has been notified. Also node graph optimizations are another issue, it would be best to keep that separate from this report. Patches are welcome if you have a way to improve that area.

Lukas Stockner commented

2017-08-31 19:05:54 +02:00

Added subscriber: @LukasStockner

Lukas Stockner commented

2017-08-31 19:05:54 +02:00

Doing the cleanup first can will actually increase the number of kernel recompiles - due to shader optimization, you could end up with different node groups depending on mix factors etc., which means you'd get annoying rebuilds while tweaking shaders. That's also a problem with attributes and resyncing, which is why those are only evaluated after optimization when doing a F12 render, and afaik the same should be happening for node groups already.

mathieu menuet commented

2017-08-31 21:26:48 +02:00

Hi @LukasStockner,

I remember you already had a patch to make the optimization before the kernel compile options are set/gathered. Could you share it in the tracker?

Hi @LukasStockner, I remember you already had a patch to make the optimization before the kernel compile options are set/gathered. Could you share it in the tracker?

Mai Lavelle commented

2017-09-04 16:49:16 +02:00

Please keep the discussion to the reported crash only. Discussion of other stuff can happen in irc, mailing list or another dedicated task.

Mai Lavelle commented

2017-09-04 17:01:07 +02:00

Closed as duplicate of #52645

Mai Lavelle closed this issue

2017-09-04 17:01:07 +02:00

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RC2: default cube with blackbody crashes Blender #52589