After building Octave with ATLAS - matrix multiplication is still single threaded

[David Parks]

My goal is to have multi-threaded matrix multiplication.

1) To that end I've built ATLAS (shared libraries are good).
2) Built Octave from sorces, linking ATLAS

Octave ./configure script shows:

...
BLAS libraries:              /usr/local/atlas/lib/libsatlas.so
...
LAPACK libraries:            /usr/local/atlas/lib/libsatlas.so
...

But this little test in Octave runs single threaded still:

octave:1> x = rand(10000,10000); y = rand(10000,10000); t=time(); z = x * y; fprintf("Processing time (sec): %d\n", time()-t);
Processing time (sec): 181

Same time it took before I rebuilt octave, this is definitely the right version of octave because I executed it from the build directory after make install using: sudo ./run-octave

Is there any way to verify that octave *is* indeed using ATLAS?  I'm not even quite sure at this stage if this is an ATLAS issue or an Octave issue. Makes of both Atlas and Octave now look correct to me.