Result on FPGA in Intel DevCloud

Question

I am learning OneAPI OpenCL FPGA implementation in the Intel DevCloud by following this link (https://github.com/intel/FPGA-Devcloud/tree/master/main/QuickStartGuides/OpenCL_Program_PAC_Quicksta...). I am working with MobaXterm on Windows OS. It's a simple 'Hello World' example. I completed every step and everything worked perfectly. It also said 'kernel execution is complete' at the end of the terminal. Now, I would like to see the 'Hello World' result. How am I able to see it in the Intel DevCloud? Thank you.

I am not sure. Aren't I expecting to see a 'Hello World' text on the FPGA in the Intel DevCloud? Please, guide me.

Answer 1

The link provided by you seems to be incomplete. If you are referring to this link: Stratix 10 PAC: OpenCL Compilation and Programming on the FPGA devcloud using Stratix 10 Devstack version 2.0.1, kindly follow the steps mentioned in the README file in the GitHub repository.

On performing the Step 3.4, you will get the following output:

uXXXX@s005-n006:~/S10_OPENCL_AFU/hello_world$ aocl program acl0 bin/hello_world.aocx
aocl program: Running program from /opt/intel/2.0.1/inteldevstack/d5005_ias_2_0_1_b237/opencl/opencl_bsp/linux64/libexec
Program succeed.

uXXXX@s005-n006:~/S10_OPENCL_AFU/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

Querying device for info:
========================
CL_DEVICE_NAME                           = pac_s10_dc : Intel PAC Platform (pac_f000000)
CL_DEVICE_VENDOR                         = Intel Corp
CL_DEVICE_VENDOR_ID                      = 4466
CL_DEVICE_VERSION                        = OpenCL 1.0 Intel(R) FPGA SDK for OpenCL(TM), Version 19.2
CL_DRIVER_VERSION                        = 19.2
CL_DEVICE_ADDRESS_BITS                   = 64
CL_DEVICE_AVAILABLE                      = true
CL_DEVICE_ENDIAN_LITTLE                  = true
CL_DEVICE_GLOBAL_MEM_CACHE_SIZE          = 32768
CL_DEVICE_GLOBAL_MEM_CACHELINE_SIZE      = 0
CL_DEVICE_GLOBAL_MEM_SIZE                = 34359737344
CL_DEVICE_IMAGE_SUPPORT                  = false
CL_DEVICE_LOCAL_MEM_SIZE                 = 16384
CL_DEVICE_MAX_CLOCK_FREQUENCY            = 1000
CL_DEVICE_MAX_COMPUTE_UNITS              = 1
CL_DEVICE_MAX_CONSTANT_ARGS              = 8
CL_DEVICE_MAX_CONSTANT_BUFFER_SIZE       = 8589934336
CL_DEVICE_MAX_WORK_ITEM_DIMENSIONS       = 3
CL_DEVICE_MEM_BASE_ADDR_ALIGN            = 8192
CL_DEVICE_MIN_DATA_TYPE_ALIGN_SIZE       = 1024
CL_DEVICE_PREFERRED_VECTOR_WIDTH_CHAR    = 4
CL_DEVICE_PREFERRED_VECTOR_WIDTH_SHORT   = 2
CL_DEVICE_PREFERRED_VECTOR_WIDTH_INT     = 1
CL_DEVICE_PREFERRED_VECTOR_WIDTH_LONG    = 1
CL_DEVICE_PREFERRED_VECTOR_WIDTH_FLOAT   = 1
CL_DEVICE_PREFERRED_VECTOR_WIDTH_DOUBLE  = 0
Command queue out of order?              = false
Command queue profiling enabled?         = true
Using AOCX: hello_world.aocx

Kernel initialization is complete.
Launching the kernel...

Thread #2: Hello from Altera's OpenCL Compiler!

Kernel execution is complete.

• The first section under "Querying platform for info", lists the FPGA platform information that is present in the Intel® DevCloud node.
• The second section under "Querying device for info" details the FPGA device information. This is only visible if there is a FPGA card installed in the node, otherwise you will get a CL_DEVICE_NOT_FOUND error.
• The line "Thread #2: Hello from Altera's OpenCL Compiler!" is the expected output of the program. This is the output that is produced from the FPGA card which is equivalent to Hello World.