Unable to run sample SYCL program

[DarshanRamakant]

Summary

I have built SYCL compiler from the source. I was trying out the example given in the below documentation :
https://intel.github.io/llvm-docs/GetStartedGuide.html#run-simple-dpc-application

After building the compiler from source, I have updated my environment as suggested

export PATH=$DPCPP_HOME/llvm/build/bin:$PATH
export LD_LIBRARY_PATH=$DPCPP_HOME/llvm/build/lib:$LD_LIBRARY_PATH

I could build the binary successfully, however on running that executable , I am getting below error

Command used to generate binary
clang++ -fsycl simple_sycl.cpp -o syc

./syc
terminate called after throwing an instance of 'sycl::_V1::runtime_error'
  what():  No device of requested type available. -1 (PI_ERROR_DEVICE_NOT_FOUND)
Aborted (core dumped)

Version

Tip commit of git
3df87e20569ea63d0a74de525b6d19788dd8afca

Environment

OS
Ubuntu 20.04.3 LTS

CPU information

Architecture:                    x86_64
CPU op-mode(s):                  32-bit, 64-bit
Byte Order:                      Little Endian
Address sizes:                   43 bits physical, 48 bits virtual
CPU(s):                          12
On-line CPU(s) list:             0-11
Thread(s) per core:              1
Core(s) per socket:              1
Socket(s):                       12
NUMA node(s):                    1
Vendor ID:                       GenuineIntel
CPU family:                      6
Model:                           85
Model name:                      Intel(R) Xeon(R) Gold 5220R CPU @ 2.20GHz
Stepping:                        0
CPU MHz:                         2194.844

Steps to reproduce

Command used to generate binary
clang++ -fsycl simple_sycl.cpp -o syc
./syc

Observed behavior

I am suspecting missing runtime libraries.

[hexu33]

OneSmpl_Team1 working on this

[hexu33]

(OneSmpl_Team1)

@DarshanRamakant

it's a runtime issue, you could try "clinfo -l" to check if the environment is configured correctly. For example:

$ clinfo -l
Platform #0: Intel(R) FPGA Emulation Platform for OpenCL(TM)
-- Device #0: Intel(R) FPGA Emulation Device Platform #1: Intel(R) OpenCL -- Device #0: 11th Gen Intel(R) Core(TM) i5-1135G7 @ 2.40GHz
Platform #2: Intel(R) OpenCL HD Graphics
`-- Device #0: Intel(R) Iris(R) Xe Graphics [0x9a49]

[bane0101]

I'm facing the exact same issue on my machine.

$ sycl_clang++ -fsycl simple_sycl.cpp -o simple.o
$ ./simple.o

terminate called after throwing an instance of 'sycl::_V1::runtime_error'
  what():  No device of requested type available. -1 (PI_ERROR_DEVICE_NOT_FOUND)
Aborted (core dumped)

Version:
origin/sycl : 6a13e45c5abd3f3d74d81efba23e1578095afd67

Config:
python $DPCPP_HOME/llvm/buildbot/configure.py -o ~/builds --enable-esimd-emulator

The following command returned nothing :
clinfo -l

Without the option -l, it returned this:
Number of platforms 0

What should I do to make the code compile and run only on host (which has no device attached) ?

[DarshanRamakant]

I'm facing the exact same issue on my machine.

$ sycl_clang++ -fsycl simple_sycl.cpp -o simple.o $ ./simple.o

terminate called after throwing an instance of 'sycl::_V1::runtime_error'
  what():  No device of requested type available. -1 (PI_ERROR_DEVICE_NOT_FOUND)
Aborted (core dumped)

Version: origin/sycl : 6a13e45c5abd3f3d74d81efba23e1578095afd67

Config: python $DPCPP_HOME/llvm/buildbot/configure.py -o ~/builds --enable-esimd-emulator

The following command returned nothing : clinfo -l

Without the option -l, it returned this: Number of platforms 0

What should I do to make the code compile and run only on host (which has no device attached) ?

I am also getting the exact same output. Numberof platform is empty.

Why dont you fix your "configure.py" to add the correct runtime dependencies ?

[bane0101]

@DarshanRamakant by fix your "configure.py" do you mean
(a) I should supply proper options in my command line?
Or
(b) the script should be smart enough to detect device availability in my system?

[bane0101]

I see a similar issue posted in Intel LLVM discussions :
intel/llvm#4493

[DarshanRamakant]

@DarshanRamakant by fix your "configure.py" do you mean (a) I should supply proper options in my command line? Or (b) the script should be smart enough to detect device availability in my system?

I was suggesting this to @hexu33 or any other developer who will be fixing this issue. I expect configure.py to take care of all the dependencies and installation.

This is a hello-world example, it will be such a turn-off if this itself is not working.