Re: Octave 3.6.1 mingw for windows - updated

[nitnit]

Hello Sébastien

Thanks for your feedback.

I don't have any idea about how to avoid the openblas crashes you are
experiencing. I has also experienced  crashes on some XP machines (with
"older" pentium cpus) I have tested with openblas while the modern cpus with
win7 where much more stable. I didn't perform many tests with the
atlas-3.8.4 based dlls.

I do not know whether these crashes were octave faults or openblas faults.

There are also some openblas dlls manually tuned for specific cpu
architecture which installers may try in case the auto-detection mechanism
of the default openblas doesn't work properly but I think that the
atlas-3.8.4 tuned for ht-pentium may be the best general solution and even
think (depending on more testing and feedback) about making it the default
one in next releases.

Regarding previous mingw octave releases, both 3.4.3 (20111025) and 3.6.0
(20120128) have atlas-3.9.19 (tuned by Tatsuro for modern core i5) as a
default. This atlas is also know to be less stable than the atlas-3.8.4
based dlls of the recent 3.6.1 mingw ditsribution.

Nitzan


Sébastien Villemot wrote
> 
> Hi,
> 
> Note that I can't use the Octave/MSVC installer because I cross-compile
> everything from my Debian GNU/Linux box (MSVC and MinGW are
> ABI-incompatible when it comes to C++ code).
> 
> The NSIS is ready, but I am facing a issue that I would like to solve
> before distributing it.
> 
> When I run Dynare using this version of Octave/MinGW, I experience a
> crash of Octave. I tracked it down to OpenBLAS: when instead I use ATLAS
> tuned for HT-pentium, the crash disappears. This has been replicated on
> two Windows XP boxes (one being a virtual machine).
> 
> I therefore intend to change the default BLAS implementation in the NSIS
> installer to be the ATLAS one, with the possibility of manually changing
> this at install time (I don't have the resources to do CPU detection as
> was done in the Octave 3.2.4 installer).
> 
> Do you have any better idea? I would be happy to use OpenBLAS, but
> obviously it is not suitable in the current state for my Dynare users.
> 
> BTW, can you tell me what implementation of BLAS was the default for
> your Octave/MinGW 3.4.3 and 3.6.0 packages (my understanding is that it
> was not OpenBLAS).
> 
> 

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