VMD-L Mailing List

From: Maxim Belkin (mbelkin_at_ks.uiuc.edu)
Date: Thu Oct 23 2014 - 11:15:25 CDT

I did a quick test: I get an error (different one, pasted below) when I use OptiX over ssh on a machine where I'm not logged in to an X11 windowing system. If I am, however, OptiX over ssh works fine.

Info) VMD for LINUXAMD64, version 1.9.2beta2optixtest1 (October 11, 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: 53302MB (82%)
Info) Creating CUDA device pool and initializing hardware...
Info) Detected 1 available CUDA accelerator:
Info) [0] GeForce GTX 770 8 SM_3.0 @ 1.08 GHz, 2.0GB RAM, KTO, AE1, ZCP
Info) Detected 1 available TachyonL/OptiX ray tracing accelerator
Info) OpenGL renderer: NVIDIA GeForce GT 330M OpenGL Engine
Info) Features: STENCIL MSAA(4) MDE MTX NPOT PP PS
Info) GLSL rendering mode is NOT available.
Info) Textures: 2-D (8192x8192), 3-D (2048x2048x2048), Multitexture (8)
Info) Dynamically loaded 2 plugins in directory:
Info) /home/mbelkin/lib_vmd/vmd/plugins/LINUXAMD64/molfile
...
Info) Ambient occlusion enabled.
Info) Shadow rendering enabled.
ERROR) OptiX error: Invalid context (Details: Function "RTresult _rtContextCompile(RTcontext)" caught exception: Unable to set the CUDA device., [3735714]) (OptiXRenderer.C:986
OptiXRenderer) An error occured compiling the context. Rendering is aborted.

> On Oct 23, 2014, at 10:48 AM, Norman Geist <norman.geist_at_uni-greifswald.de> wrote:
>
> Hi John,
>
> Yes, using it locally works fine, here the output:
>
> Local:
>
> 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, 64 CPUs detected.
> Info) Free system memory: 117456MB (90%)
> Info) Creating CUDA device pool and initializing hardware...
> Info) Detected 1 available CUDA accelerator:
> Info) [0] GeForce GTX 660 5 SM_3.0 @ 1.03 GHz, 2.0GB RAM, KTO, AE1, ZCP
> Info) Detected 1 available TachyonL/OptiX ray tracing accelerator
> 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: GeForce GTX 660/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) /alfred/bin/vmd/vmd-1.9.2b1/plugins/LINUXAMD64/molfile
> after#0
> vmd >
> [...]
> vmd > Info) Rendering current scene to 'vmdscene.ppm' ...
> Total OptiX rendering time: 0.9 sec
> Info) Executing post-render cmd 'display vmdscene.ppm' ...
>
> SSH Forwarded:
>
> 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, 64 CPUs detected.
> Info) Free system memory: 117364MB (90%)
> Info) Creating CUDA device pool and initializing hardware...
> Info) Detected 1 available CUDA accelerator:
> Info) [0] GeForce GTX 660 5 SM_3.0 @ 1.03 GHz, 2.0GB RAM, KTO, AE1, ZCP
> Info) Detected 1 available TachyonL/OptiX ray tracing accelerator
> 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: GeForce GTX 660/PCIe/SSE2
> Info) Features: STENCIL MSAA(4) MDE MTX NPOT PP PS GLSL(OVFG)
> 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) /alfred/bin/vmd/vmd-1.9.2b1/plugins/LINUXAMD64/molfile
> after#0
> vmd >
> [...]
> Info) Rendering current scene to 'vmdscene.ppm' ...
> ERROR) OptiX error: Unknown error (Details: Function "RTresult
> _rtContextLaunch2D(RTcontext, unsigned int, RTsize, RTsize)" caught
> exception: Encountered a CUDA error: cuGLGetDevices() returned (201):
> Invalid context, [3801520]) (OptiXRenderer.C:1002
> OptiX: An error occured in AS generation. Rendering is aborted.
> Total OptiX rendering time: 0.8 sec
> Info) Executing post-render cmd 'display vmdscene.ppm' ...
> display: improper image header `vmdscene.ppm' @
> error/pnm.c/ReadPNMImage/295.
>
>
> Norman Geist.
>
>> -----Ursprüngliche Nachricht-----
>> Von: John Stone [mailto:johns_at_ks.uiuc.edu]
>> Gesendet: Donnerstag, 23. Oktober 2014 17:30
>> An: Norman Geist
>> Cc: VMD Mailing List
>> Betreff: Re: vmd-l: Tachyon-Optix failure when SSH X11
>>
>> Norman,
>> Do you get a particular error message? I wouldn't expect it to
>> matter
>> if you're redirecting X to a remote display, at least in the OptiX code
>> paths I'm actually using. I have run OptiX renderings with no display,
>> e.g. with VMD using "-dispdev text" without any problems, so I'm
>> puzzled
>> why the remote display would matter. When you're remote displaying,
>> does
>> VMD identify the CUDA devices in the machine correctly? I assume you
>> have
>> also tested this same machine and when running to a local display it
>> works fine?
>>
>> Cheers,
>> John Stone
>> vmd_at_ks.uiuc.edu
>>
>> On Thu, Oct 23, 2014 at 05:01:31PM +0200, Norman Geist wrote:
>>> Just want to report that using the Tachyon Optix Renderer doesn't
>> work
>>> when redirected over SSH.
>>>
>>> - cheers -
>>>
>>>
>>>
>>> Norman Geist
>>>
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