> On Mar 27, 2017, at 8:01 PM, Shailesh Tripathi 
> <shailesh.tripathi.ec...@itbhu.ac.in> wrote:
> 
> Finally, now all the errors are resolved. deviceQuery' is working fine with 
> CUDA which hints that OpenCL is also setup.
> Now, as I told the 'rt' command and 'rt and 'rt -z1' gives quantitatively 
> equal results. 
> How can I make sure that 'rt -z1' is making use of GPU?

You should see a consistent difference in performance, but this would require 
compiling and installing both with and without OpenCL support to make sure the 
same compilation options are being used.

Another tell-tale sign is that the OpenCL path does not yet handle booleans.  
If you render the havoc sample model, does it look like the rendering here 
http://brlcad.org/wiki/User:Vasco.costa/GSoC15/logs ?

Last but not least, it should say "Compiling OpenCL programs...” and “OCLPREP” 
instead of “PREP” in the output.

Cheers!
Sean


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