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New Contributor I
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aoc error for emulation

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Hi,

   I installed opencl intel fpga sdk 19.2 and after installation the hello world example seems to compile smoothly taking default board as Arria10GX. But when i try giving the emulator compilation, i get following error:

My Machine spec:

Xeon-16 cores,32 GB RAM and Ubuntu 18.04.

 

 aoc -march=emulator  -fast-emulator -v device/hello_world.cl -o bin/hello_world.aocx
Warning: Command has been deprecated. The Fast Emulator is the default emulator; use -legacy-emulator if you wish to target the Legacy Emulator.
Error: aoc: The Intel(R) Kernel Builder for OpenCL(TM) compiler (ioc64) can not be found

 

Any idea on how i can fix this.

 

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Accepted Solutions
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Vinay,

Please, check that you set the environment variable CL_CONTEXT_EMULATOR_DEVICE_INTELFPGA=<number_of_devices>.

For more information about emulating OpenCL Kernels read here.

 

Best regards,

Sergey

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8 Replies
New Contributor I
533 Views

Hello Intel Folks,

     May i request you to please suggest solution for me. I need emulator urgently for my development.

 

 

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Hello Vinay,

Sorry for delay in answer.

 

In previous version of aoc you should use "-march=emulator and -fast-emulator".

In 19.2 version, please, use "-march=emulator -legacy-emulator".

I guess, documentation of aoc was not updated to 19.2.

 

Best regards,

Sergey

New Contributor I
533 Views

Thanks Sergey for your help.

Now i am able to compile, but running gives error as below:

 

ERROR: CL_DEVICE_NOT_FOUND
Location: ../common/src/AOCLUtils/opencl.cpp:356
Query for number of devices failed

Please let me know how i can get this working.

 

 

My Runs are as below :

 

(base) wc@ign:~/Documents/opencl_fpga/exm_opencl_hello_world_x64_linux/hello_world$ aoc -march=emulator -legacy-emulator -board=a10gx  device/hello_world.cl -o bin/hello_world.aocx
aoc: Running OpenCL parser....
aoc: OpenCL parser completed successfully.
aoc: Linking Object files....
aoc: Compiling for Emulation ....

 

------------------------------Make of hello world --------------------------------------------------------------------------------------

(base) wc@ign:~/Documents/opencl_fpga/exm_opencl_hello_world_x64_linux/hello_world$ make
../common/src/AOCLUtils/opencl.cpp: In function ‘_cl_program* aocl_utils::createProgramFromBinary(cl_context, const char*, _cl_device_id* const*, unsigned int)’:
../common/src/AOCLUtils/opencl.cpp:388:22: warning: ignoring attributes on template argument ‘cl_int {aka int}’ [-Wignored-attributes]
   scoped_array<cl_int> binary_status(num_devices);
                      ^

 

 

------------------------------Running hello world ---------------------------------------------------------------------

(base) wc@ign:~/Documents/opencl_fpga/exm_opencl_hello_world_x64_linux/hello_world$ bin/host
Querying platform for info:
==========================
CL_PLATFORM_NAME                         = Intel(R) FPGA SDK for OpenCL(TM)
CL_PLATFORM_VENDOR                       = Intel(R) Corporation
CL_PLATFORM_VERSION                      = OpenCL 1.0 Intel(R) FPGA SDK for OpenCL(TM), Version 19.2

ERROR: CL_DEVICE_NOT_FOUND
Location: ../common/src/AOCLUtils/opencl.cpp:356
Query for number of devices failed

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534 Views

Vinay,

Please, check that you set the environment variable CL_CONTEXT_EMULATOR_DEVICE_INTELFPGA=<number_of_devices>.

For more information about emulating OpenCL Kernels read here.

 

Best regards,

Sergey

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New Contributor I
533 Views

Thanks Sergey, it really helped.

 

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Beginner
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Hi Sergey,

       I work in Vinay's team. I was trying out the Sobel Filter Design Example. While compiling the host code I got this error 

host/src/display.cpp:23:10: fatal error: SDL2/SDL.h: No such file or directory
 #include <SDL2/SDL.h>
          ^~~~~~~~~~~~
compilation terminated.
../common/src/AOCLUtils/opencl.cpp: In function ‘_cl_program* aocl_utils::createProgramFromBinary(cl_context, const char*, _cl_device_id* const*, unsigned int)’:
../common/src/AOCLUtils/opencl.cpp:388:22: warning: ignoring attributes on template argument ‘cl_int {aka int}’ [-Wignored-attributes]
   scoped_array<cl_int> binary_status(num_devices);
                      ^
Makefile:74: recipe for target 'bin/host' failed
make: *** [bin/host] Error 1

 

Please help me to solve this.

 

Thanks and regards,

Hamsika.
 

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Employee
533 Views

Hi Hamsika,

Sorry for delay.

Could you please check that you have libsdl2-dev on your machine?

If not, you can install it by executing this command:

sudo apt-get install libsdl2-dev

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Beginner
428 Views

Use this library in ur path.It will work 

cheers,

Prithvi (ISRO)

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