Will only run in JTP mode

[GoogleCodeExporter]

Install and run Mandel sample.  Runs but with JNI fallback.

18-Oct-2011 11:17:03 com.amd.aparapi.KernelRunner warnFallBackAndExecute
WARNING: Reverting to Java Thread Pool (JTP) for class 
com.amd.aparapi.sample.mandel.Main$MandelKernel: initJNI failed to return a 
valid handle
Execution mode=JTP;

Vista 32 bit java version "1.6.0_26" Intel CPU, GeForce GTX 460. I have the latest AMD APP SDK.

Our own custom Java/openCL code using Jocl runs on either GPU or CPU. Device information from JOCL below in case that helps.

Number of platforms: 2
Number of devices in platform NVIDIA CUDA: 1
Number of devices in platform AMD Accelerated Parallel Processing: 1
--- Info for device GeForce GTX 460: ---
CL_DEVICE_NAME:     GeForce GTX 460
CL_DEVICE_VENDOR:   NVIDIA Corporation
CL_DRIVER_VERSION:  275.33
CL_DEVICE_TYPE:         CL_DEVICE_TYPE_GPU
...
--- Info for device Intel(R) Core(TM)2 CPU          6600  @ 2.40GHz
CL_DEVICE_NAME: Intel(R) Core(TM)2 CPU          6600  @ 2.40GHz
CL_DRIVER_VERSION:  2.0
CL_DEVICE_TYPE:     CL_DEVICE_TYPE_CPU

Original issue reported on code.google.com by stephenT...@gmail.com on 18 Oct 2011 at 10:28

[GoogleCodeExporter]

I see in the user guide:
Aparapi depends on AMD’s OpenCL™ driver to execute on the GPU and therefore 
shares the same device, driver, and platform compatibility requirements as AMD 
APP SDK V2.5®.

Does "AMD’s OpenCL™ driver" mean the graphics card driver or the AMD APP 
SDK driver?  Maybe my configuration is not intended to be supported. In that 
case I withdraw the issue; though it would of course be good to see it fixed.

Probably not relevant but ...
I had a false (I hope) positive from Norton on aparapi_x86.dll after initial 
unzip.  I restored it from quarantine, so that issue shouldn't be related to 
the failure.  Just in case I have tried executing with Norton turned off, but 
same warnFallBackAndExecute issue.  

Thanks, Stephen

Original comment by stephenT...@gmail.com on 18 Oct 2011 at 11:49

[GoogleCodeExporter]

Stephen my guess is that the opencl version check is failing. We check for 
version 1.1 (except for mac os)

Are you in a position to build aparapi from source to try some experimemts?

Apologies for brevity. On phone from vacation. 

In the aparapi.cpp file we check the version string, possibly this is not 
matching the pattern we expect in your case. 

There is a property to turn on jni warnings (see quickreference guide pdf) it 
should report discovered version info.

Original comment by frost.g...@gmail.com on 18 Oct 2011 at 12:38

[GoogleCodeExporter]

Original comment by frost.g...@gmail.com on 18 Oct 2011 at 12:40

• Changed state: Accepted

[GoogleCodeExporter]

Try setting -Dcom.amd.aparapi.enableVerboseJNI=true to see if jni code is 
reporting any issues. Also ensure that the opencl driver (in your case nvidia) 
is in your path.

Original comment by frost.g...@gmail.com on 18 Oct 2011 at 12:46

[GoogleCodeExporter]

I am ashamed ~ after all the times I've asked people 'Have you installed the 
latest drivers?'  The point in your first comment was correct, and confirmed by 
the enableVerboseJNI in your second comment.  With new NVidia drivers, all 
works ok.

Thanks for the brilliant service ~ but you should be European instead of 
American: DON'T check your work when on vacation.  Again, many thanks.  Stephen

Original comment by stephenT...@gmail.com on 18 Oct 2011 at 1:05

[GoogleCodeExporter]

No problem Stephen. Glad to help and glad that you sorted it out.

Original comment by frost.g...@gmail.com on 18 Oct 2011 at 2:16

• Changed state: WontFix

[GoogleCodeExporter]

nvidia  290.36 => not working please give a working driverversion

Original comment by ma...@freenet.de on 3 Dec 2011 at 11:02

[GoogleCodeExporter]

same problem here :

C:\Users\LaptpUser\Folder\aparapi-2012-02-15\aparapi-2012-02-15\samples\mandel>j
av
a  -Djava.library.path=../..  -Dcom.amd.aparapi.executionMode=  -classpath ../..
/aparapi.jar;mandel.jar  com.amd.aparapi.sample.mandel.Main
5/05/2012 09:15:36 PM com.amd.aparapi.KernelRunner warnFallBackAndExecute
WARNING: Reverting to Java Thread Pool (JTP) for class com.amd.aparapi.sampl
e.mandel.Main$MandelKernel: initJNI failed to return a valid handle
Execution mode=JTP

Asus Laptop Core i7 8GB RAM / AMD HD5730 1GB RAM
Java 6

Original comment by yur...@gmail.com on 6 May 2012 at 2:28

[GoogleCodeExporter]

How did this get solved? I have the same problem

Original comment by jovanson...@truste.com on 5 Jul 2012 at 3:54

[GoogleCodeExporter]

I think that Stephen downloaded the latest OpenCL driver from NVidia for his 
device.  Aparapi needs OpenCL 1.1 or above (on windows/linux).  We allow 1.0 
for Apple.

If you type clinfo (usually installed with OpenCL runtime) it should report the 
OpenCL driver version. 

If you enableVersboseJNI (-Dcom.amd.aparapi.enableVerboseJNI) aparapi will 
report the drivers that it encounters (including version I think). 

Gary

Original comment by frost.g...@gmail.com on 5 Jul 2012 at 6:37