CUDA kernel compilation fails with PTX assembler internal failure #39526

New Issue

Benjamin · 2014-03-31T05:39:29+02:00

Benjamin commented

2014-03-31 05:39:29 +02:00

System Information
OS: Gentoo Linux (kernel version: 3.0), Graphics Card: Nvidia GeForce GT 640, Cuda version: 5.5

Blender Version
Broken: 2.70, c24c343
Worked: 2.70, unknown hash (downloaded as source code from blender website for 2.70 release rather than using git)

Short description of error
When rendering using Cuda for the first time it needed to compile the kernels. It failed at this step with the following error message:

CUDA version 5.5 detected, build may succeed but only CUDA 5.0 is officially supported.
Compiling CUDA kernel ...
"nvcc" -arch=sm_30 -m32 --cubin "/root/blender-versions/mycopy/build/bin/2.70/scripts/addons/cycles/kernel/kernel.cu" -o "/root/.config/blender/2.70/cache/cycles_kernel_sm30_95088DA6C7DFF4F1EA0DD66BE94D2583.cubin" --ptxas-options="-v" --maxrregcount=32 --use_fast_math -I"/root/blender-versions/mycopy/build/bin/2.70/scripts/addons/cycles/kernel" -DNVCC -D__KERNEL_CUDA_VERSION__=55
nvcc error : 'ptxas' died due to signal 11 (Invalid memory reference)
CUDA kernel compilation failed, see console for details.

Refer to the Cycles GPU rendering documentation for possible solutions:
ht

I do not think that this is actually a problem with Cuda 5.5 because it worked on the other build using the same Cuda version. I noticed two unusual problems here: the error message is not a compiler error but an assembler error, and it is actually an internal error in ptxas itself. I found a single reference to this problem but it was on the Nvidia forums (which have been down for multiple years and force a redirection loop with Midori) :http:*devtalk.nvidia.com/default/topic/395921/cuda-programming-and-performance/-ptxas-died/

Exact steps for others to reproduce the error
Press f12. default.blend

**System Information** OS: Gentoo Linux (kernel version: 3.0), Graphics Card: Nvidia GeForce GT 640, Cuda version: 5.5 **Blender Version** Broken: 2.70, c24c343 Worked: 2.70, unknown hash (downloaded as source code from blender website for 2.70 release rather than using git) **Short description of error** When rendering using Cuda for the first time it needed to compile the kernels. It failed at this step with the following error message: CUDA version 5.5 detected, build may succeed but only CUDA 5.0 is officially supported. Compiling CUDA kernel ... "nvcc" -arch=sm_30 -m32 --cubin "/root/blender-versions/mycopy/build/bin/2.70/scripts/addons/cycles/kernel/kernel.cu" -o "/root/.config/blender/2.70/cache/cycles_kernel_sm30_95088DA6C7DFF4F1EA0DD66BE94D2583.cubin" --ptxas-options="-v" --maxrregcount=32 --use_fast_math -I"/root/blender-versions/mycopy/build/bin/2.70/scripts/addons/cycles/kernel" -DNVCC -D__KERNEL_CUDA_VERSION__=55 nvcc error : 'ptxas' died due to signal 11 (Invalid memory reference) CUDA kernel compilation failed, see console for details. Refer to the Cycles GPU rendering documentation for possible solutions: ht I do not think that this is actually a problem with Cuda 5.5 because it worked on the other build using the same Cuda version. I noticed two unusual problems here: the error message is not a compiler error but an assembler error, and it is actually an internal error in ptxas itself. I found a single reference to this problem but it was on the Nvidia forums (which have been down for multiple years and force a redirection loop with Midori) :[http:*devtalk.nvidia.com/default/topic/395921/cuda-programming-and-performance/-ptxas-died/ ](http:*devtalk.nvidia.com/default/topic/395921/cuda-programming-and-performance/-ptxas-died/) **Exact steps for others to reproduce the error** Press f12. [default.blend](https://archive.blender.org/developer/F83528/default.blend)

Benjamin commented

2014-03-31 05:39:29 +02:00

Changed status to: 'Open'

Benjamin commented

2014-03-31 05:39:29 +02:00

Added subscriber: @Benjamin-L

blender-admin commented

2014-03-31 05:39:29 +02:00

#39513 was marked as duplicate of this issue

Benjamin commented

2014-03-31 06:24:38 +02:00

This comment was removed by @Benjamin-L

*This comment was removed by @Benjamin-L*

Benjamin commented

2014-03-31 06:25:10 +02:00

Added subscribers: @MartijnBerger, @ThomasDinges, @zanqdo, @brecht

Benjamin commented

2014-03-31 06:25:10 +02:00

◀ Merged tasks: #39513.

Brecht Van Lommel was assigned by Bastien Montagne

2014-03-31 08:22:12 +02:00

Bastien Montagne commented

2014-03-31 08:22:12 +02:00

Added subscriber: @mont29

Bastien Montagne commented

2014-03-31 08:22:12 +02:00

Next time, please do not preform "management" tasks like merge & co, this is for devs to decide! And Cuda 5.0 and 5.5 are different things, as stated by your error message, 5.5 is not officially supported, while 5.0 is.

And even though the error happens in ptxas, it does not mean it’s not a CUDA issue! Also note that our kernel changes over time, so a hash might build on 5.5, and the next one fail.

We may close this report, since 5.5 is not supported, but will let Brecht decide.

Next time, please do not preform "management" tasks like merge & co, this is for devs to decide! And Cuda 5.0 and 5.5 are different things, as stated by your error message, 5.5 is not officially supported, while 5.0 is. And even though the error happens in ptxas, it does not mean it’s not a CUDA issue! Also note that our kernel changes over time, so a hash might build on 5.5, and the next one fail. We may close this report, since 5.5 is not supported, but will let Brecht decide.

Martijn Berger changed title from ~~PTX assembler internal failure~~ to CUDA kernel compilation fails with PTX assembler internal failure

2014-03-31 10:51:46 +02:00

Martijn Berger commented

2014-03-31 10:53:11 +02:00

Changed status from 'Open' to: 'Duplicate'

Martijn Berger closed this issue

2014-03-31 10:53:11 +02:00

Martijn Berger commented

2014-03-31 10:53:11 +02:00

✘ Merged into #39513.

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CUDA kernel compilation fails with PTX assembler internal failure #39526