Matrix_mul in FPGA Only warning coming up

Hi,

Please follow the below steps to run matrix_mul in the FPGA emulator(in oneAPI DevCloud).

Step 1: Under matrix_multiplication folder:

• Create build_fpga_emu.sh

  #!/bin/bash
  
  #PBS -l nodes=1:fpga_compile:ppn=2
  #PBS -d .
  
  source /opt/intel/oneapi/setvars.sh > /dev/null 2>&1
  
  echo
  echo start: $(date "+%y/%m/%d %H:%M:%S.%3N")
  echo
  
  make fpga_emu -f Makefile.fpga
  
  echo
  echo stop: $(date "+%y/%m/%d %H:%M:%S.%3N")
  echo

• Create run_fpga_emu.sh.

#!/bin/bash

#PBS -l nodes=1:fpga_compile:ppn=2
#PBS -d .

source /opt/intel/oneapi/setvars.sh > /dev/null 2>&1

echo
echo start: $(date "+%y/%m/%d %H:%M:%S.%3N")
echo

make run_emu -f Makefile.fpga

echo
echo end: $(date "+%y/%m/%d %H:%M:%S.%3N")
echo

• Create Makefile.fpga and paste the contents as below:

CXX := dpcpp
CXXFLAGS = -O2 -g -std=c++17

SRC := src/matrix_mul_dpcpp.cpp

.PHONY: fpga_emu run_emu  clean

fpga_emu: matrix_mul_dpcpp.fpga_emu
report: matrix_mul_dpcpp.a

matrix_mul_dpcpp.fpga_emu: $(SRC)
        $(CXX) $(CXXFLAGS) -fintelfpga $^ -o $@ -DFPGA_EMULATOR=1

a.o: $(SRC)
        $(CXX) $(CXXFLAGS) -fintelfpga -c $^ -o $@ -DFPGA=1

run_emu: matrix_mul_dpcpp.fpga_emu
         ./matrix_mul_dpcpp.fpga_emu

dev.o: $(SRC)
        $(CXX) $(CXXFLAGS) -fintelfpga -c $^ -o $@ -DFPGA=1

clean:
        rm -rf *.o *.d *.out *.mon *.emu *.aocr *.aoco *.prj *.fpga_emu *.fpga_emu matrix_mul_dpcpp.fpga *.a

Step 2: Navigate to the src folder in matrix_mul

Step 3: Edit the matrix_mul_dpcpp.cpp file as below:

• Add in the header :

#include <sycl/ext/intel/fpga_extensions.hpp>

• Add the below under main() :

#if FPGA_EMULATOR
  // DPC++ extension: FPGA emulator selector on systems without FPGA card.
  ext::intel::fpga_emulator_selector d_selector;
#elif FPGA
  // DPC++ extension: FPGA selector on systems with FPGA card.
  ext::intel::fpga_selector d_selector;
#else
  // The default device selector will select the most performant device.
  default_selector d_selector;
#endif

After editing and creating the above files run the below commands:

qsub -l nodes=1:fpga_compile:ppn=2 -d . build_fpga_emu.sh

qsub -l nodes=1:fpga_compile:ppn=2 -d . run_fpga_emu.sh

The result will be generated. Please try and let us know if you need any clarifications.

If this resolves your issue, make sure to accept this as a solution. This would help others with similar issues. Thank you!

Regards,

Remya Premdas