64bit compat_linux and matlab

Hi all,

I was wondering: what's the status of 64bit linux
emulation?  Does that
basically work or are there tweaks?  In particular, I'd be
interested in
running the new 64bit version of Matlab on NetBSD/amd64. 
Anybody tried
that?

-Jan

-- 
``Californians have gotten to the point of being completely
intolerant
of non-diversity.'' -- Larry Wall

Jan Schaumann <jschaumanetmeister.org> wrote:
 
> I was wondering: what's the status of 64bit linux
emulation?  Does that
> basically work or are there tweaks?  In particular,
I'd be interested in
> running the new 64bit version of Matlab on
NetBSD/amd64.  Anybody tried
> that?

I installed the 64bit version of matlab, but unfortunately
it doesn't
seem to get anywhere.  It gets killed almost immediately
with a Linux
SIGRT0.  A ktrace is available here:
http://www.cs.stevens.edu/~jschauma/netbsd/matlab64.kdu
mp

If anybody has any idea on how to get this to work, I'd
appreciate any
pointers.  If I can't get the 64bit version of matlab to
run, I'll
likely to have to convert a number of machines to lunix. :-/

-Jan

-- 
"The last time anybody made a list of the top hundred
character
attributes of New Yorkers, common sense snuck in at number
79."

Jan Schaumann <jschaumanetmeister.org> wrote:
 
> I was wondering: what's the status of 64bit linux
emulation?  Does that
> basically work or are there tweaks?  In particular,
I'd be interested in
> running the new 64bit version of Matlab on
NetBSD/amd64.  Anybody tried
> that?

Just as another datapoint for those interested in this:

One of my users has installed the 64bit version of matlab on
64bit
Linux, only to find out that the 64bit version actually runs
_slower_
than the 32bit version.  He found the following note in a
matlab forum:

"Please note that Native (machine) code for the
Just-In-Time (JIT)
compiler is not available for 64-bit versions of MATLAB.
This implies
that scalar operations are performed in the accelerator,
which will
be slower than if the operations were perfomed using machine
code. As
a result, the execution of some operations will be slower in
64-bit
versions of MATLAB than in 32-bit versions of MATLAB. We are
aware of
this issue and are working towards implementing native code
for JIT
on 64-bit versions of MATLAB."

He says that the 32bit version runs approx. 50% faster.

Now on to get the 32bit version running on NetBSD/amd64 with
COMPAT_LINUX32...

-Jan

-- 
Tradition is the illusion of permanence. -- Woody Allen