[CI] Temporarily disable OCL FPGA Emulator

[alexbatashev]

FPGA emulator causes crashes on SYCL runtime initialization.

[bader]

Do I understand it correctly that even if we bypass sycl-ls problem and re-enable FPGA emulator environment, there will be sporadic failures of llvm-test-suite tests?

[alexbatashev]

Do I understand it correctly that even if we bypass sycl-ls problem and re-enable FPGA emulator environment, there will be sporadic failures of llvm-test-suite tests?

That's right, the tests will just fail later.

[alexbatashev]

FYI, the backtrace looks like this, so the very basic scenario is broken:

(gdb) thread apply all bt

Thread 1 (Thread 0x7f6f6425f000 (LWP 592)):
#0  0x00007f6f63f65f93 in Intel::OpenCL::Framework::PlatformModule::GetPlatformInfo(_cl_platform_id*, unsigned int, unsigned long, void*, unsigned long*) () from /runtimes/fpgaemu/x64/libintelocl_emu.so
#1  0x00007f6f63e62e19 in clGetPlatformInfo () from /runtimes/fpgaemu/x64/libintelocl_emu.so
#2  0x00007f6f643d83d6 in ?? () from /lib/x86_64-linux-gnu/libOpenCL.so.1
#3  0x00007f6f643d8c5d in ?? () from /lib/x86_64-linux-gnu/libOpenCL.so.1
#4  0x00007f6f643d90d3 in clGetPlatformIDs () from /lib/x86_64-linux-gnu/libOpenCL.so.1
#5  0x00007f6f6424f2ad in piPlatformsGet () from /opt/sycl/lib/libpi_opencl.so
#6  0x00007f6f64cc42fb in cl::sycl::detail::platform_impl::get_platforms() () from /opt/sycl/lib/libsycl.so.5
#7  0x00007f6f64d98f22 in cl::sycl::platform::get_platforms() () from /opt/sycl/lib/libsycl.so.5
#8  0x0000560ba889fb87 in main ()

[bader]

Any ideas what might trigger this issue? I see that FPGA emulator hasn't been change for weeks - https://github.com/intel/llvm/blob/sycl/devops/dependencies.json, but the issue appeared quite recently.

[yanfeng3721]

Hi @bader , is there any plan to enable oclfpgaemu back for CI testing?
BTW, will there be an oclfpgaemu CI testing similar as the current oclcpu CI tesing "Linux / OCL x64 LLVM Test Suite" in the future?

default_selector()      : gpu, Intel(R) Level-Zero, Intel(R) UHD Graphics [0x9bca] 1.3 [1.3.24278]
  accelerator_selector()  : No device of requested type available. -1 (PI_ERRO...
  cpu_selector()          : cpu, Intel(R) OpenCL, Intel(R) Core(TM) i7-10710U CPU @ 1.10GHz 3.0 [2022.14.8.0.04_1[600](https://github.com/intel/llvm/actions/runs/3245321030/jobs/5323539661#step:8:621)00]
  gpu_selector()          : gpu, Intel(R) Level-Zero, Intel(R) UHD Graphics [0x9bca] 1.3 [1.3.24278]
  custom_selector(gpu)    : gpu, Intel(R) Level-Zero, Intel(R) UHD Graphics [0x9bca] 1.3 [1.3.24278]
  custom_selector(cpu)    : cpu, Intel(R) OpenCL, Intel(R) Core(TM) i7-10710U CPU @ 1.10GHz 3.0 [2022.14.8.0.04_160000]
  custom_selector(acc)    : No device of requested type available. -1 (PI_ERRO...

[bader]

FPGA emulator causes crashes on SYCL runtime initialization.

@yanfeng3721, do you know if this issue has been resolved?
If so, feel free to revert this change and enable FPGA emulator validation.

BTW, will there be an oclfpgaemu CI testing similar as the current oclcpu CI tesing "Linux / OCL x64 LLVM Test Suite" in the future?

To be honest, I would rather run tests for FPGA features on FPGA emulator rather than the whole test suite. There is minor difference between OpenCL CPU and FPGA emulator, so running non-FPGA tests with OpenCL CPU should be good enough.

Tagging @pvchupin, @MrSidims and @AlexeySachkov to hear their opinions.