VMD-L Mailing List

From: Stober, Spencer T (spencer.t.stober_at_exxonmobil.com)
Date: Fri Sep 26 2014 - 09:40:07 CDT

Hello,

I am having issues using the new CUDA accelerated Tachyon renderer. Any help is much appreciated.

I receive the following error when I attempt to render a scene using OptiX Tachyon:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Info) Rendering current scene to 'vmdscene.ppm' ...
ERROR) OptiX error: Invalid value (Details: Function "RTresult _rtContextSetDevices(RTcontext, unsigned int, const int*)" caught exception: The list of devices is incompatible., [1575404]) (OptiXRenderer.C:505
OptiX: An error occured validating the context. Rendering is aborted.
Total OptiX rendering time: 0.2 sec
Info) Executing post-render cmd 'display vmdscene.ppm' ...
display: Improper image header `vmdscene.ppm' @ pnm.c/ReadPNMImage/297.
Info) Rendering complete.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

I believe my CUDA devices are recognized and configured properly (they work for NAMD), and this is the startup message I get when I start VMD:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Info) VMD for LINUXAMD64, version 1.9.2beta1 (September 12, 2014)
Info) http://www.ks.uiuc.edu/Research/vmd/
Info) Email questions and bug reports to vmd_at_ks.uiuc.edu
Info) Please include this reference in published work using VMD:
Info) Humphrey, W., Dalke, A. and Schulten, K., `VMD - Visual
Info) Molecular Dynamics', J. Molec. Graphics 1996, 14.1, 33-38.
Info) -------------------------------------------------------------
Info) Multithreading available, 16 CPUs detected.
Info) Free system memory: 254232MB (98%)
Info) Creating CUDA device pool and initializing hardware...
Info) Ignoring CUDA-capable GPUs used for display
Info) Detected 4 available CUDA accelerators:
Info) [0] Tesla K20Xm 14 SM_3.5 @ 0.73 GHz, 5.6GB RAM, AE2, ZCP
Info) [2] Tesla K20Xm 14 SM_3.5 @ 0.73 GHz, 5.6GB RAM, AE2, ZCP
Info) [3] Tesla K20Xm 14 SM_3.5 @ 0.73 GHz, 5.6GB RAM, AE2, ZCP
Info) [4] Tesla K20Xm 14 SM_3.5 @ 0.73 GHz, 5.6GB RAM, AE2, ZCP
Info) Detected 5 available TachyonL/OptiX ray tracing accelerators
Warning) Detected X11 'Composite' extension: if incorrect display occurs
Warning) try disabling this X server option. Most OpenGL drivers
Warning) disable stereoscopic display when 'Composite' is enabled.
Info) OpenGL renderer: Quadro 2000D/PCIe/SSE2
Info) Features: STENCIL MSAA(4) MDE CVA MTX NPOT PP PS GLSL(OVFGS)
Info) Full GLSL rendering mode is available.
Info) Textures: 2-D (16384x16384), 3-D (2048x2048x2048), Multitexture (4)
Info) Dynamically loaded 2 plugins in directory:
Info) /data/lib/vmd/plugins/LINUXAMD64/molfile
after#0
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Spencer T. Stober, Ph.D.
ExxonMobil Research and Engineering
600 Billingsport Rd
Paulsboro, NJ 08066
Phone: 856-224-2638
Email: spencer.t.stober_at_exxonmobil.com<mailto:spencer.t.stober_at_exxonmobil.com>