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| From: | Dmitri A. Sergatskov |
| Subject: | [Octave-bug-tracker] [bug #53700] eigs test failure related to ARPACK generating real NaN rather than complex NaN+1i*NaN |
| Date: | Fri, 20 Apr 2018 14:54:38 -0400 (EDT) |
| User-agent: | Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:59.0) Gecko/20100101 Firefox/59.0 |
Follow-up Comment #21, bug #53700 (project octave):
it works for me wit hany blas:
LD_PRELOAD=/usr/lib64/atlas/libtatlas.so ./run-octave -f -q
octave:1> tic; test eigs; toc
PASSES 179 out of 179 tests
Elapsed time is 1.33795 seconds.
LD_PRELOAD=/usr/lib64/atlas/libsatlas.so ./run-octave -f -q
octave:1> tic; test eigs; toc
PASSES 179 out of 179 tests
Elapsed time is 1.33742 seconds.
LD_PRELOAD=/usr/lib64/libopenblaso.so ./run-octave -f -q
octave:1> tic; test eigs; toc
PASSES 179 out of 179 tests
Elapsed time is 1.68253 seconds.
octave:2> tic; test eigs; toc
PASSES 179 out of 179 tests
Elapsed time is 1.50371 seconds.
LD_PRELOAD=/usr/lib64/libopenblasp.so ./run-octave -f -q
octave:1> tic; test eigs; toc
PASSES 179 out of 179 tests
Elapsed time is 1.68722 seconds.
LD_PRELOAD=/usr/lib64/libopenblas.so ./run-octave -f -q
octave:1> tic; test eigs; toc
PASSES 179 out of 179 tests
Elapsed time is 1.42171 seconds.
LD_PRELOAD=/usr/lib64/libblas.so ./run-octave -f -q
octave:1> tic; test eigs; toc
PASSES 179 out of 179 tests
Elapsed time is 1.40842 seconds.
Notice the times are different wrt blas version -- atlas seems faster than
ref/openblas. So it is possible that actual solutions are different. (I think
the size of the problem is too small to judge the efficiency of particular
blas implementation.)
Dmitri.
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