test_SparseGPRegression_rbf_white_kern_1d test failure on powerpc64le arch

[Apteryks]

Hello,

Found by GNU Guix CI (https://ci.guix.gnu.org/build/2921270/)

[...]
test_SparseGPRegression_rbf_white_kern_1d (GPy.testing.model_tests.GradientTests)
Testing the sparse GP regression with rbf kernel with white kernel on 1d data ... initializing Y
initializing inference method
adding kernel and likelihood as parameters
Adding Z as parameter
FAIL
[...]

======================================================================
FAIL: test_SparseGPRegression_rbf_white_kern_1d (GPy.testing.model_tests.GradientTests)
Testing the sparse GP regression with rbf kernel with white kernel on 1d data
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/tmp/guix-build-python-gpy-1.10.0.drv-0/GPy-1.10.0/GPy/testing/model_tests.py", line 788, in test_SparseGPRegression_rbf_white_kern_1d
    self.check_model(rbf, model_type='SparseGPRegression', dimension=1)
  File "/tmp/guix-build-python-gpy-1.10.0.drv-0/GPy-1.10.0/GPy/testing/model_tests.py", line 682, in check_model
    self.assertTrue(m.checkgrad())
AssertionError: False is not true

----------------------------------------------------------------------
Ran 274 tests in 466.921s

FAILED (failures=1, skipped=3)

Thanks!

[MartinBubel]

Hi @Apteryks
could you please retry using GPy==1.13.1? Tests have been migrated from nose to pytest and some things have changed.

[Apteryks]

Hi! I just tried updating GPy to version 1.13.1, and I'm getting a syntax error in the mpi_test__.py file which seemingly uses Python 2 syntax:

testing/mpi_test__.py'...
***   File "/gnu/store/7gyd40a2zchj2j1s796v5393laxpvr9l-python-gpy-1.13.1/lib/python3.10/site-packages/GPy/testing/mpi_test__.py", line 16
    print float(m.objective_function())
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print(...)?

Any tip?

[MartinBubel]

Clearly, this is a something I overlooked when modernizing the tests.
I am a little confused why CI testing did not run into this 🤔 but anyways, thanks for reporting! I'll open up a branch on this one.

[MartinBubel]

@Apteryks I am not sure how you are running the tests. Is there any way you can test if branch 1054-test_sparsegpregression_rbf_white_kern_1d-test-failure-on-powerpc64le-arch fixes this?

[Apteryks]

Sorry, I meant to try it, but some other package is now failing some tests as well on that architecture now (python-werkzeug-2.0.2) so I'd have to fix that one first to test again.

[MartinBubel]

Just saw this issue, as off now, could be considered a duplicate of #1056 (#1056 is newer but better descibres the underlying problem).

I'll probably start a PR on #1056 soon. If done, you can check whether that fix helps you out with this issue.
python-werkzeug is not a dependency of this GPy. Could you elaborate on the environment you are using so we can better test if it works im combination with GPy?

[Apteryks]

So, I used the following command to build the latest source of GPy on a powerpc64le (offload) machine, and it seems to work:

$ guix build python-gpy --with-git-url=python-gpy=https://github.com/SheffieldML/GPy --with-branch=python-gpy=1054-test_sparsegpregression_rbf_white_kern_1d-test-failure-on-powerpc64le-arch --system=powerpc64le-linux --without-tests=python-werkzeug --without-tests=nss
[...]
GPy/testing/test_model.py::TestGradient::test_GPRegression_bias_kern_1D PASSED [ 60%]
GPy/testing/test_model.py::TestGradient::test_GPRegression_bias_kern_2D PASSED [ 61%]
GPy/testing/test_model.py::TestGradient::test_GPRegression_linear_kern_1D_ARD PASSED [ 61%]
GPy/testing/test_model.py::TestGradient::test_GPRegression_linear_kern_2D_ARD PASSED [ 61%]
GPy/testing/test_model.py::TestGradient::test_GPRegression_linear_kern_1D PASSED [ 62%]
GPy/testing/test_model.py::TestGradient::test_GPRegression_linear_kern_2D PASSED [ 62%]
GPy/testing/test_model.py::TestGradient::test_SparseGPRegression_rbf_white_kern_1d PASSED [ 62%]
GPy/testing/test_model.py::TestGradient::test_SparseGPRegression_rbf_white_kern_2D PASSED [ 63%]
GPy/testing/test_model.py::TestGradient::test_SparseGPRegression_rbf_linear_white_kern_1D PASSED [ 63%]
GPy/testing/test_model.py::TestGradient::test_SparseGPRegression_rbf_linear_white_kern_2D PASSED [ 64%]
GPy/testing/test_model.py::TestGradient::test_SparseGPRegression_rbf_white_kern_2D_uncertain_inputs PASSED [ 64%]
GPy/testing/test_model.py::TestGradient::test_SparseGPRegression_rbf_white_kern_1D_uncertain_inputs PASSED [ 64%]
GPy/testing/test_model.py::TestGradient::test_TPRegression_matern52_1D PASSED [ 65%]
GPy/testing/test_model.py::TestGradient::test_TPRegression_rbf_2D SKIPPED (No idea why this fails all of a sudden but need to go ahead.) [ 65%]
GPy/testing/test_model.py::TestGradient::test_TPRegression_rbf_ARD_2D PASSED [ 65%]
GPy/testing/test_model.py::TestGradient::test_TPRegression_matern52_2D PASSED [ 66%]
GPy/testing/test_model.py::TestGradient::test_TPRegression_matern52_ARD_2D PASSED [ 66%]
[...]
=== 255 passed, 15 skipped, 11 xfailed, 28336 warnings in 305.22s (0:05:05) ====
phase `check' succeeded after 306.4 seconds
[...]

As you can see I encountered other test failures in other packages on that architecture (python-werkzeug and nss) that are found somewhere in the transitive dependencies of python-gpy:

$ guix graph --path python-gpy python-werkzeug
python-gpy@1.13.1
python-pods@0.1.14
python-pandas@2.1.1
python-pytest-localserver@0.7.1
python-werkzeug@2.0.2

and

$ guix graph --path python-gpy nss
python-gpy@1.13.1
python-matplotlib@3.8.2
cairo@1.18.0
poppler@22.09.0
nss@3.88.1

I'll report Guix issues for these.

So it looks like this issue is fixed on the branch! Thank you!

[MartinBubel]

Thanks for the checking @Apteryks . I'll close the issue.