Summary

After cuBLAS backend was aligned with SYCL 2020 specification, a large number of cuBLAS tests failed.

Environment

• OS: Linux
• Hardware: NVIDIA TITAN RTX
• Backend library version: CUDA 10.2
• Compiler version: sycl-nightly 20220210

Steps to reproduce

Clone the branch: https://github.com/dnhsieh-intel/oneMKL/tree/SYCL_2020_cuBLAS

$ mkdir build && cd build
$ cmake .. -DENABLE_CUBLAS_BACKEND=True -DENABLE_MKLCPU_BACKEND=False -DENABLE_MKLGPU_BACKEND=False -DREF_BLAS_ROOT=<reference_blas_install_prefix> -DTARGET_DOMAINS=blas
$ cmake --build .
$ ctest --output-on-failure

Observed behavior

Some cuBLAS tests using dynamic libraries reported segmentation faults in column major cases. Output of cuBLAS unit tests: cublas_unit_tests.txt (81% tests passed, 321 tests failed out of 1668)

Examples of failed tests:

          Start    1: BLAS/RT/Nrm2TestSuite/Nrm2Tests.RealSinglePrecision/Column_Major_TITAN_RTX
   1/1668 Test    #1: BLAS/RT/Nrm2TestSuite/Nrm2Tests.RealSinglePrecision/Column_Major_TITAN_RTX ..................................***Exception: SegFault  1.42 sec

          Start  155: BLAS/RT/CopyUsmTestSuite/CopyUsmTests.RealSinglePrecision/Column_Major_TITAN_RTX
 155/1668 Test  #155: BLAS/RT/CopyUsmTestSuite/CopyUsmTests.RealSinglePrecision/Column_Major_TITAN_RTX ............................***Exception: SegFault  0.58 sec
Run this program with --terse_output to change the way it prints its output.
Note: Google Test filter = CopyUsmTestSuite/CopyUsmTests.RealSinglePrecision/Column_Major_TITAN_RTX
[==========] Running 1 test from 1 test suite.
[----------] Global test environment set-up.
[----------] 1 test from CopyUsmTestSuite/CopyUsmTests
[ RUN      ] CopyUsmTestSuite/CopyUsmTests.RealSinglePrecision/Column_Major_TITAN_RTX
relative error = 1.59858 absolute error = 0.543816 limit = 0.000161767
Difference in entry 0: DPC++ -0.203628 vs. Reference 0.340188
relative error = 2.13229 absolute error = 0.225206 limit = 0.000161767
Difference in entry 1: DPC++ -0.330823 vs. Reference -0.105617
relative error = 2.63611 absolute error = 0.746282 limit = 0.000161767
...

Expected behavior

cuBLAS tests passed.