Matrix_mul in FPGA Only warning coming up

Hi,

Thank you for posting in Intel Communities.

Could you please let us know which DevCloud you are using. Is it DevCloud for Edge/FPGA/OneAPI ?

Thanks,

Remya

It is Devcloud for OneAPI

Hi,

Could you please share with us a sample reproducer and the script files for build_fpga_hw.sh and run_fpga_hw.sh

Also, please confirm whether you are taking the sample from the repo: https://github.com/oneapi-src/oneAPI-samples/tree/master/DirectProgramming/DPC%2B%2B/DenseLinearAlgebra.

And note that all the samples given here are not designed for FPGA hardware. You can see under the pre-requisites>hardware section in the README file to know that.

Regards,

Remya Premdas

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

Tried all these steps

Included Makefile.fpga

I think Fpga is not getting detected. FPGA_Emulator and FPGA are in red color when .cpp file is edited.

So after build

and after run nothing is happening

No output.. No error..

Is there anything else to do initially before all these steps..?

Hi,

Sharing the screenshot of the matrix_mul_dpcpp.cpp file, where you need to make the changes.

Are you saying about the highlighted part in the code? If yes, the red highlight shouldn't be a problem.

Make sure the spaces and tabs are given correctly in all the files.

If issue still exist, please send a screenshot/content of the error files.

Regards,

Remya Premdas

Hi,

Can you please send the screenshot of matrix_mul_dpcpp.cpp you mentioned as I am not able to see any image.

Regards

Hi,

I am attaching the screenshot and files. Please check and let us know if you are able to do the execution.

Regards,

Remya Premdas

Hi,

Thanks a lot! It worked.. I guess some issue was there inside my Makefile.fpga it is working in Fpga emulator now.

What change should I do to work in Fpga hardware?

I tried generating run_fpga_hw.sh and build_fpga_hw.sh.. and then tried building. But the warning that I earlier mentioned still persist. So changes should be done in Makefile.fpga ?

Hi,

We are working on this internally with the team. We will get back to you.

Regards,

Remya Premdas