[Numpy-discussion] svn test failures: linalg with complex

[Eric Firing]

Pauli Virtanen wrote:
> Sat, 18 Apr 2009 09:41:28 -1000, Eric Firing wrote:
> 
>> I updated my Thinkpad to Ubuntu 9.04 release candidate, 32-bit, got a
>> fresh svn checkout of numpy trunk, built, and installed.  Running
>> numpy.test() yields 16 errors (output attached) in linear algebra on
>> complex arguments.  Is this expected?
> 
> The Numpy test suite should run without any failures. The failures here 
> likely indicate that something is wrong with LAPACK/BLAS/ATLAS on
> Ubuntu 9.04.
> 
> Apparently, at least ATLAS's complex single-precision routines are 
> completely hosed on that platforms. I filed a bug here:
> 
> 	https://bugs.launchpad.net/ubuntu/+source/atlas/+bug/363510
> 
> Seems specific to the SSE version of Atlas. Could you comment on the bug 
> tracker if you see the same thing on your machine?

Done. A difference between your setup and mine is that I am using sse2, 
not sse.  Maybe that is why I see even more failures.

There is a libatlas-test package.  I installed it, ran the tests, and 
sure enough, two failed.  (See my second comment on your bug report.)

This is a real pain.  What is the simplest work-around?

Eric

> 
> Consequently, on 9.04 I get the following failures, but for some reason 
> these are not the same as yours:
> 
> 
> Running unit tests for 
> numpy-1.4.0.dev6826.4e95223c11c627aa8f4878b40953d75ea8228add-py2.5-linux-
> i686.egg.numpy
> NumPy version 1.4.0.dev6826.4e95223c11c627aa8f4878b40953d75ea8228add
> NumPy is installed in /home/pauli/koodi/proj/scipy/numpy.git/dist/linux/
> lib/python2.5/site-packages/
> numpy-1.4.0.dev6826.4e95223c11c627aa8f4878b40953d75ea8228add-py2.5-linux-
> i686.egg/numpy
> Python version 2.5.4 (r254:67916, Apr  4 2009, 17:55:16) [GCC 4.3.3]
> nose version 0.10.4
> .......
> ======================================================================
> FAIL: test_csingle (test_linalg.TestLstsq)
> ----------------------------------------------------------------------
> Traceback (most recent call last):
>   File ".../numpy/linalg/tests/test_linalg.py", line 39, in test_csingle
>     self.do(a, b) 
>   File ".../numpy/linalg/tests/test_linalg.py", line 141, in do
>     assert_almost_equal(b, dot(a, x))
>   File ".../numpy/linalg/tests/test_linalg.py", line 23, in 
> assert_almost_equal
>     old_assert_almost_equal(a, b, decimal=decimal, **kw)
>   File ".../numpy/testing/utils.py", line 262, in assert_almost_equal
>     return assert_array_almost_equal(actual, desired, decimal, err_msg)
>   File ".../numpy/testing/utils.py", line 537, in 
> assert_array_almost_equal
>     header='Arrays are not almost equal')
>   File ".../numpy/testing/utils.py", line 395, in assert_array_compare
>     raise AssertionError(msg)
> AssertionError:
> Arrays are not almost equal
> 
> (mismatch 100.0%)
>  x: array([ 2.+1.j,  1.+2.j], dtype=complex64)
>  y: array([  7.22953510+1.74995685j,  10.88255692+1.7498703j ], 
> dtype=complex64)
> 
> ======================================================================
> FAIL: test_csingle (test_linalg.TestSolve)
> ----------------------------------------------------------------------
> Traceback (most recent call last):
>   File ".../numpy/linalg/tests/test_linalg.py", line 39, in test_csingle
>     self.do(a, b)
>   File ".../numpy/linalg/tests/test_linalg.py", line 76, in do
>     assert_almost_equal(b, dot(a, x))
>   File ".../numpy/linalg/tests/test_linalg.py", line 23, in 
> assert_almost_equal
>     old_assert_almost_equal(a, b, decimal=decimal, **kw)
>   File ".../numpy/testing/utils.py", line 262, in assert_almost_equal
>     return assert_array_almost_equal(actual, desired, decimal, err_msg)
>   File ".../numpy/testing/utils.py", line 537, in 
> assert_array_almost_equal
>     header='Arrays are not almost equal')
>   File ".../numpy/testing/utils.py", line 395, in assert_array_compare
>     raise AssertionError(msg)
> AssertionError: 
> Arrays are not almost equal
> 
> (mismatch 100.0%)
>  x: array([ 2.+1.j,  1.+2.j], dtype=complex64)
>  y: array([  7.22953510+1.74995685j,  10.88255692+1.7498703j ], 
> dtype=complex64)
> 
> ----------------------------------------------------------------------
> Ran 2034 tests in 41.154s
> 
> FAILED (KNOWNFAIL=1, failures=2)
>