Error in using emulator mode with SDK 20.1 for hello_world example

[beiwang2003]

I have quartus 19.2 and FPGA SDK 20.1. When trying to compile the OpenCL code with emulator mode:  aoc -march=emulator -o ./bin/hello_world.aocx ./device/hello_world.cl, I had the following error message in running the code. The problem is resolved by using -legacy-emulator option. Same problem and solution for SDK 19.4. My question is when do I need to use -legacy-emulator option for SDK 19.4 and beyond?  Thanks

[beiwang@della-fpga1 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 20.1

Querying device for info:

========================

CL_DEVICE_NAME                           = EmulatorDevice : Emulated Device

CL_DEVICE_VENDOR                         = Intel(R) Corporation

CL_DEVICE_VENDOR_ID                      = 4466

CL_DEVICE_VERSION                        = OpenCL 1.0 Intel(R) FPGA SDK for OpenCL(TM), Version 20.1

CL_DRIVER_VERSION                        = 20.1

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                = 403931233280

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       = 100982808320

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?              = true

Command queue profiling enabled?         = true

Using AOCX: hello_world.aocx

Context callback: Malformed program binary: missing .acl.board section

Context callback: kernel argument info is not available

Context callback: Invalid binary

ERROR: CL_INVALID_BINARY

Location: ../common/src/AOCLUtils/opencl.cpp:407

Failed to create program with binary

[AnilErinch_A_Intel]

Hi, 

This could be related to the  Altera.icd file being used in the system. 

Please see a thread below which discusses a similar issue. 

https://community.intel.com/t5/Intel-High-Level-Design/Error-when-performing-emulation-for-v19-3/td-p/731970

Please let us know whether it helps. 

Thanks and Regards

Anil

[beiwang2003]

Hi, Anil,

I've tried this by replacing the current Altera.icd file at /etc/OpenCL/vendors/ with the one at .../19.4/hld/Altera.icd. It is still the same error message during running:Context callback: Malformed program binary: missing .acl.board section

Thanks

Bei

[AnilErinch_A_Intel]

Hi,
It turns out that From version 19.4 onwards there are two options available

1. Legacy emulator

export CL_CONTEXT_EMULATOR_DEVICE_INTELFPGA=1

./host -legacy-emulator

2. If you want to use the fast emulator

export CL_CONFIG_CPU_EMULATE_DEVICES=1

./host -emulator

Please try both the options and  let us know about the  performance.

Thanks and Regards
Anil

[AnilErinch_A_Intel]

Hi ,

Please let us know whether the below options

1. Legacy emulator

export CL_CONTEXT_EMULATOR_DEVICE_INTELFPGA=1

./host -legacy-emulator

2. If you want to use the fast emulator

export CL_CONFIG_CPU_EMULATE_DEVICES=1

./host -emulator

Helped in resolving the issue

Thanks and Regards

Anil

[AnilErinch_A_Intel]

Hi ,

Please let us know whether the previous suggestion was helpful, and whether the issue was resolved.

Thanks and Regards

Anil

[PVeli]

Hello Anil,

When I am using legacy emulator for 19.3 I am getting following error. Please suggest me asap.

Platform: Intel(R) FPGA Emulation Platform for OpenCL(TM)
Using AOCX: traffic_stn.aocx
Context callback: clCreateProgramWithBinary failed
ERROR: CL_INVALID_BINARY
Location: ../common/src/AOCLUtils/opencl.cpp:392
Failed to create program with binary

[AnilErinch_A_Intel]

Hi ,

for the latest error message which you are getting please refer the below forum link

https://community.intel.com/t5/Intel-Quartus-Prime-Software/Got-CL-INVALID-BINARY-error-when-emulated-HelloWorld-example-on/td-p/34890

and let us know whether the suggestions outlined there helps to solve the issue.

Thanks and Regards

Anil

[AnilErinch_A_Intel]

Hi ,

for the latest error message which you are getting please refer the below forum link

https://community.intel.com/t5/Intel-Quartus-Prime-Software/Got-CL-INVALID-BINARY-error-when-emulated-HelloWorld-example-on/td-p/34890

and let us know whether the suggestions outlined there helps to solve the issue.

Thanks and Regards

Anil