[Octave-bug-tracker] [bug #47554] logm(rand(i)) : i>=130 gives segfault on mxe-octave 64bit (openblas issue)

[Philip Nienhuis]

Follow-up Comment #1, bug #47554 (project octave):

It works fine with the 32-bit version (using openblas) from ftp.gnu.org:

>> tic; a = logm (rand(1000)); toc
Elapsed time is 53.309 seconds.


(where cpu time in task manager = 39 seconds).
I saw only 25% CPU load, I'm sure I had openblas selected at install time.
Indeed libblas.dll's size in /bin equals that of libopenblas.dll)
I have no home-built 64-bit 4.0.1 version, I'll see if I can make one today
and try this again.

With a development 4.1.0+ cross-build, also invoking openblas, I cannot
reproduce it here either. It was configured with:
--enable-windows-64 --enable-devel-tools --enable-binary-packages
--enable-octave=default
and an octave-4.1.0+ "make dist" based on 6187f1d2ca13 "zip.m: Restore
processing of wildcards  ...."
Octave-4.1.0+ seems a bit faster:

>> tic; a = logm (rand(1000)); toc
Elapsed time is 44.1555 seconds.


(CPU time according to Task Manager 30 secs. CPU load 75 % for a while)


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