cumulative_logsumexp raises Runtime warning loop not vectorized while running on CPU device

[antonwolfy]

The below warning is raised from cumulative_logsumexp call during the first launch on CPU device:

import dpctl, dpctl.tensor as dpt

dpctl.__version__
# Out: '0.17.0dev0+331.g1243edc8f5'

a = dpt.ones(10, device='cpu')
dpt.cumulative_logsumexp(a)
warning: <unknown>:0:0: loop not vectorized: the optimizer was unable to perform the requested transformation; the transformation might be disabled or specified as part of an unsupported transformation ordering
# Out:
# usm_ndarray([1.        , 1.69314718, 2.09861229, 2.38629436, 2.60943791,
#              2.79175947, 2.94591015, 3.07944154, 3.19722458, 3.30258509])

There is no warning when running on OCL or L0 GPU.

Environment details

$ conda list
# packages in environment at /home/xantvol/miniconda3/envs/dpnp_dev:
#
# Name                    Version                   Build  Channel
_libgcc_mutex             0.1                 conda_forge    intel
_openmp_mutex             4.5                       2_gnu    intel
_sysroot_linux-64_curr_repodata_hack 3                   h69a702a_14    conda-forge
astroid                   3.0.3                    pypi_0    pypi
asttokens                 2.4.1              pyhd8ed1ab_0    conda-forge
attrs                     23.2.0             pyh71513ae_0    conda-forge
beautifulsoup4            4.12.3             pyha770c72_0    conda-forge
brotli-python             1.1.0            py39h3d6467e_1    intel
bzip2                     1.0.8                hb9a14ef_9    intel
c-ares                    1.26.0               hd590300_0    intel
ca-certificates           2024.2.2             hbcca054_0    intel
certifi                   2024.2.2           pyhd8ed1ab_0    intel
cffi                      1.16.0           py39h7a31438_0    intel
cfgv                      3.3.1                    pypi_0    pypi
chardet                   5.2.0            py39hf3d152e_1    intel
charset-normalizer        3.3.2              pyhd8ed1ab_0    intel
click                     8.0.4            py39h06a4308_0    intel
cmake                     3.29.2               h91dbaaa_1    conda-forge
codespell                 2.2.6                    pypi_0    pypi
colorama                  0.4.6              pyhd8ed1ab_0    intel
conda                     23.3.1           py39h535c160_1    http://satpkgserver.an.intel.com:8081
conda-build               24.1.2           py39hf3d152e_0    conda-forge
conda-index               0.4.0              pyhd8ed1ab_0    conda-forge
conda-package-handling    2.2.0              pyh38be061_0    intel
conda-package-streaming   0.9.0              pyhd8ed1ab_0    intel
coverage                  5.5              py39h27cfd23_2    intel
cpplint                   1.6.1                    pypi_0    pypi
cryptography              42.0.4           py39hd4f0224_0    intel
cython                    3.0.8            py39h3d6467e_0    intel
decorator                 5.0.9              pyhd3eb1b0_0    intel
dill                      0.3.8                    pypi_0    pypi
distlib                   0.3.6                    pypi_0    pypi
distro                    1.9.0              pyhd8ed1ab_0    conda-forge
dpcpp-cpp-rt              2024.2.0              intel_684    http://satpkgserver.an.intel.com:8081
dpcpp-sycl-rt             2024.2.0              intel_684    http://satpkgserver.an.intel.com:8081
dpcpp_cpp_rt              2024.2.0              intel_684    http://satpkgserver.an.intel.com:8081
dpcpp_impl_linux-64       2024.2.0              intel_684    http://satpkgserver.an.intel.com:8081
dpcpp_linux-64            2024.2.0              intel_684    http://satpkgserver.an.intel.com:8081
dpctl                     0.17.0dev0      py39h15de555_331    dppy/label/dev
dpnp                      0.15.0.dev1+51.gad8d1c3033.dirty           dev_0    <develop>
exceptiongroup            1.2.0              pyhd8ed1ab_2    conda-forge
executing                 2.0.1              pyhd8ed1ab_0    conda-forge
filelock                  3.6.0              pyhd3eb1b0_0    intel
icc_rt                    2024.2.0              intel_684    http://satpkgserver.an.intel.com:8081
icu                       73.2                 h59595ed_0    intel
identify                  2.5.24                   pypi_0    pypi
idna                      3.6                pyhd8ed1ab_0    intel
importlib_resources       5.2.0              pyhd3eb1b0_1    intel
iniconfig                 2.0.0              pyhd8ed1ab_0    conda-forge
intel-cmplr-lib-rt        2024.2.0              intel_684    http://satpkgserver.an.intel.com:8081
intel-cmplr-lib-ur        2024.2.0              intel_684    http://satpkgserver.an.intel.com:8081
intel-cmplr-lic-rt        2024.2.0              intel_684    http://satpkgserver.an.intel.com:8081
intel-opencl-rt           2024.2.0              intel_684    http://satpkgserver.an.intel.com:8081
intel-openmp              2024.2.0              intel_684    http://satpkgserver.an.intel.com:8081
intel-sycl-rt             2024.2.0              intel_684    http://satpkgserver.an.intel.com:8081
intelpython               2024.2.0                      0    http://satpkgserver.an.intel.com:8081
ipython                   8.18.1             pyh707e725_3    conda-forge
isort                     5.13.2                   pypi_0    pypi
jedi                      0.19.1             pyhd8ed1ab_0    conda-forge
jinja2                    3.0.1              pyhd3eb1b0_0    intel
jsonpatch                 1.33               pyhd8ed1ab_0    intel
jsonpointer               2.4              py39hf3d152e_3    intel
jsonschema                4.22.0             pyhd8ed1ab_0    conda-forge
jsonschema-specifications 2023.12.1          pyhd8ed1ab_0    conda-forge
kernel-headers_linux-64   4.18.0               he073ed8_2    conda-forge
keyutils                  1.6.1                h166bdaf_0    conda-forge
krb5                      1.21.2               h659d440_0    conda-forge
level-zero                1.16.0               h00ab1b0_0    intel
libarchive                3.7.2                h2aa1ff5_1    conda-forge
libcurl                   8.7.1                hca28451_0    conda-forge
libedit                   3.1.20210910         h7f8727e_0    intel
libev                     4.33                 h7f8727e_1    intel
libexpat                  2.6.2                h59595ed_0    conda-forge
libffi                    3.4.2                h7f98852_5    intel
libgcc-ng                 13.2.0               h807b86a_5    intel
libgomp                   13.2.0               h807b86a_5    intel
libiconv                  1.17                 hd590300_2    intel
liblief                   0.14.1               hac33072_1    conda-forge
libllvm14                 14.0.6               hcd5def8_4    intel
libnghttp2                1.58.0               h47da74e_0    conda-forge
libnsl                    2.0.1                hd590300_0    intel
libsqlite                 3.45.1               h2797004_0    intel
libssh2                   1.11.0               h0841786_0    conda-forge
libstdcxx-ng              13.2.0               h7e041cc_5    intel
libuuid                   2.38.1               h0b41bf4_0    intel
libuv                     1.48.0               hd590300_0    conda-forge
libxml2                   2.12.5               h232c23b_0    intel
libzlib                   1.2.13               hd590300_5    intel
llvm                      14.0.6               h32600fe_4    intel
lz4-c                     1.9.4                hcb278e6_0    intel
lzo                       2.10              h516909a_1000    intel
markupsafe                2.0.1            py39h27cfd23_0    intel
matplotlib-inline         0.1.7              pyhd8ed1ab_0    conda-forge
mccabe                    0.7.0                    pypi_0    pypi
menuinst                  2.0.2            py39hf3d152e_0    conda-forge
mkl                       2024.2.0              intel_472    http://satpkgserver.an.intel.com:8081
mkl-devel                 2024.2.0              intel_472    http://satpkgserver.an.intel.com:8081
mkl-devel-dpcpp           2024.2.0              intel_472    http://satpkgserver.an.intel.com:8081
mkl-dpcpp                 2024.2.0              intel_472    http://satpkgserver.an.intel.com:8081
mkl-include               2024.2.0              intel_472    http://satpkgserver.an.intel.com:8081
mkl-service               2.4.1            py39h1e356de_0    http://satpkgserver.an.intel.com:8081
mkl_fft                   1.3.8           py39h977b55c_71    http://satpkgserver.an.intel.com:8081
mkl_random                1.2.4           py39hae8aba8_91    http://satpkgserver.an.intel.com:8081
mkl_umath                 0.1.1           py39h9ab9c7e_101    http://satpkgserver.an.intel.com:8081
more-itertools            10.2.0             pyhd8ed1ab_0    conda-forge
ncurses                   6.4.20240210         h59595ed_0    conda-forge
ninja                     1.10.2           py39hff7bd54_0    intel
nodeenv                   1.8.0                    pypi_0    pypi
numpy                     1.26.4           py39h689b997_2    http://satpkgserver.an.intel.com:8081
numpy-base                1.26.4           py39h913173e_2    http://satpkgserver.an.intel.com:8081
onedpl-devel              2022.6.0              intel_414    http://satpkgserver.an.intel.com:8081
onemkl-sycl-blas          2024.2.0              intel_472    http://satpkgserver.an.intel.com:8081
onemkl-sycl-datafitting   2024.2.0              intel_472    http://satpkgserver.an.intel.com:8081
onemkl-sycl-dft           2024.2.0              intel_472    http://satpkgserver.an.intel.com:8081
onemkl-sycl-lapack        2024.2.0              intel_472    http://satpkgserver.an.intel.com:8081
onemkl-sycl-rng           2024.2.0              intel_472    http://satpkgserver.an.intel.com:8081
onemkl-sycl-sparse        2024.2.0              intel_472    http://satpkgserver.an.intel.com:8081
onemkl-sycl-stats         2024.2.0              intel_472    http://satpkgserver.an.intel.com:8081
onemkl-sycl-vm            2024.2.0              intel_472    http://satpkgserver.an.intel.com:8081
openssl                   3.2.1                hd590300_1    intel
packaging                 23.2               pyhd8ed1ab_0    intel
parso                     0.8.4              pyhd8ed1ab_0    conda-forge
patch                     2.7.6             h7f98852_1002    conda-forge
patchelf                  0.17.2               h58526e2_0    conda-forge
pexpect                   4.9.0              pyhd8ed1ab_0    conda-forge
pickleshare               0.7.5                   py_1003    conda-forge
pip                       24.0               pyhd8ed1ab_0    intel
pkginfo                   1.10.0             pyhd8ed1ab_0    conda-forge
pkgutil-resolve-name      1.3.10             pyhd8ed1ab_1    conda-forge
platformdirs              3.7.0                    pypi_0    pypi
pluggy                    1.4.0              pyhd8ed1ab_0    conda-forge
pre-commit                3.3.3                    pypi_0    pypi
prompt-toolkit            3.0.42             pyha770c72_0    conda-forge
psutil                    5.8.0            py39h27cfd23_2    intel
ptyprocess                0.7.0              pyhd3deb0d_0    conda-forge
pure_eval                 0.2.2              pyhd8ed1ab_0    conda-forge
py-lief                   0.14.1           py39h84cc369_1    conda-forge
pycosat                   0.6.6            py39hd1e30aa_0    intel
pycparser                 2.21               pyhd3eb1b0_0    intel
pygments                  2.18.0             pyhd8ed1ab_0    conda-forge
pylint                    3.0.3                    pypi_0    pypi
pyopenssl                 24.0.0             pyhd8ed1ab_0    intel
pysocks                   1.7.1              pyha2e5f31_6    intel
pytest                    8.1.2              pyhd8ed1ab_0    conda-forge
pytest-cov                5.0.0              pyhd8ed1ab_0    conda-forge
python                    3.9.18               h4499717_0    http://satpkgserver.an.intel.com:8081
python-libarchive-c       4.0              py39hf3d152e_2    intel
python_abi                3.9                      2_cp39    intel
pytz                      2024.1             pyhd8ed1ab_0    intel
pyyaml                    6.0.1            py39hd1e30aa_1    intel
readline                  8.2                  h8228510_1    intel
referencing               0.35.1             pyhd8ed1ab_0    conda-forge
requests                  2.31.0             pyhd8ed1ab_0    intel
rhash                     1.4.4                hd590300_0    conda-forge
ripgrep                   14.1.0               he8a937b_0    conda-forge
rpds-py                   0.18.1           py39ha68c5e3_0    conda-forge
ruamel.yaml               0.17.40          py39hd1e30aa_0    intel
ruamel.yaml.clib          0.2.8            py39hd1e30aa_0    intel
scikit-build              0.17.6             pyh4af843d_0    conda-forge
setuptools                69.1.0             pyhd8ed1ab_1    intel
six                       1.16.0             pyhd3eb1b0_1    intel
soupsieve                 2.5                pyhd8ed1ab_1    conda-forge
stack_data                0.6.2              pyhd8ed1ab_0    conda-forge
sysroot_linux-64          2.28                 he073ed8_2    conda-forge
tbb                       2021.13.0             intel_493    http://satpkgserver.an.intel.com:8081
tbb-devel                 2021.13.0             intel_493    http://satpkgserver.an.intel.com:8081
tbb4py                    2021.13.0        py39_intel_493    http://satpkgserver.an.intel.com:8081
tk                        8.6.13          noxft_h4845f30_101    intel
toml                      0.10.2             pyhd8ed1ab_0    conda-forge
tomli                     2.0.1              pyhd8ed1ab_0    conda-forge
tomlkit                   0.12.3                   pypi_0    pypi
toolz                     0.12.1             pyhd8ed1ab_0    intel
tqdm                      4.66.2             pyhd8ed1ab_0    intel
traitlets                 5.14.3             pyhd8ed1ab_0    conda-forge
typing-extensions         4.9.0                hd8ed1ab_0    intel
typing_extensions         4.9.0              pyha770c72_0    intel
tzdata                    2024a                h0c530f3_0    intel
urllib3                   2.2.1              pyhd8ed1ab_0    intel
virtualenv                20.23.1                  pypi_0    pypi
wcwidth                   0.2.13             pyhd8ed1ab_0    conda-forge
wheel                     0.42.0             pyhd8ed1ab_0    intel
xz                        5.2.8                h5eee18b_0    intel
yaml                      0.2.5                h7f98852_2    intel
zipp                      3.15.0             pyhd8ed1ab_0    intel
zstandard                 0.19.0           py39h29414ee_1    intel
zstd                      1.5.6                ha6fb4c9_0    conda-forge

Driver versions

$ python -m dpctl -f
Platform  0 ::
    Name        Intel(R) OpenCL
    Version     OpenCL 3.0 LINUX
    Vendor      Intel(R) Corporation
    Backend     opencl
    Num Devices 1
      # 0
        Name                11th Gen Intel(R) Core(TM) i7-1185G7 @ 3.00GHz
        Version             2024.18.4.0.26_160000
        Filter string       opencl:cpu:0
Platform  1 ::
    Name        Intel(R) OpenCL Graphics
    Version     OpenCL 3.0
    Vendor      Intel(R) Corporation
    Backend     opencl
    Num Devices 1
      # 0
        Name                Intel(R) Graphics [0x9a49]
        Version             23.52.28202.16
        Filter string       opencl:gpu:0
Platform  2 ::
    Name        Intel(R) FPGA Emulation Platform for OpenCL(TM)
    Version     OpenCL 1.2 Intel(R) FPGA SDK for OpenCL(TM), Version 20.3
    Vendor      Intel(R) Corporation
    Backend     opencl
    Num Devices 1
      # 0
        Name                Intel(R) FPGA Emulation Device
        Version             2024.18.4.0.26_160000
        Filter string       opencl:accelerator:0
Platform  3 ::
    Name        Intel(R) Level-Zero
    Version     1.3
    Vendor      Intel(R) Corporation
    Backend     ext_oneapi_level_zero
    Num Devices 1
      # 0
        Name                Intel(R) Graphics [0x9a49]
        Version             1.3.28202
        Filter string       level_zero:gpu:0

WSL info

$ uname -a
Linux antonvol-mobl1 5.15.146.1-microsoft-standard-WSL2 #1 SMP Thu Jan 11 04:09:03 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux

Is it expected to have such kind of warning here?

[oleksandr-pavlyk]

Note, that the message does not show with DPC++ 2024.1:

(dev_dpctl) opavlyk@opavlyk-mobl:~/repos/application_examples/kde$ ipython
Python 3.12.3 | packaged by conda-forge | (main, Apr 15 2024, 18:38:13) [GCC 12.3.0]
Type 'copyright', 'credits' or 'license' for more information
IPython 8.24.0 -- An enhanced Interactive Python. Type '?' for help.

In [1]: import dpctl.tensor as dpt

In [2]: x = dpt.ones(10, device='cpu')

In [3]: dpt.cumulative_logsumexp(x)
Out[3]:
usm_ndarray([1.        , 1.69314718, 2.09861229, 2.38629436, 2.60943791,
             2.79175947, 2.94591015, 3.07944154, 3.19722458, 3.30258509])

In [4]: !icpx --version
Intel(R) oneAPI DPC++/C++ Compiler 2024.1.0 (2024.1.0.20240308)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /opt/intel/oneapi/compiler/2024.1/bin/compiler
Configuration file: /opt/intel/oneapi/compiler/2024.1/bin/compiler/../icpx.cfg

In [5]: !sycl-ls
[opencl:acc:0] Intel(R) FPGA Emulation Platform for OpenCL(TM), Intel(R) FPGA Emulation Device OpenCL 1.2  [2024.17.3.0.08_160000]
[opencl:cpu:1] Intel(R) OpenCL, 11th Gen Intel(R) Core(TM) i7-1185G7 @ 3.00GHz OpenCL 3.0 (Build 0) [2024.17.3.0.08_160000]