irix 5.3 executable on irix 6.2

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4 total messages Started by Dave Schuller Tue, 22 Oct 1996 00:00

#228

Author: Dave Schuller
Date: Tue, 22 Oct 1996 00:00

34 lines
2007 bytes

hi,

finally got my hands on an Indigo 10000 for testing.
It came pre-loaded with Irix 6.2.

I ran a program on it just to compare speed with our older
R4000 machines, and was surprised to find that the output
of the program was not verbatim identical.  The program
executable was compiled on an Indigo R4000 under IRix 5.3.
since it is already an executable, I don't see how compiler bugs
could be a consideration. (compiled with f77. the program is
magicsquash, for X-ray crystallographic phase extension.)

so what is a R10000 with Irix 6.2 doing differently with an
Irix 5.3 executable as compared to an R4000 with Irix 5.3?
Is some of the 32 bit math run as 64 bit or something?

has anyone else noticed similar phenomena?  has it caused
anyone difficulties?

(BTW, the 175 MHz R1000 was ~ 3 times faster than the 60 MHz R4000,
but I expect better when we get around to re-compiling under
irix 6.2, and especially if we decide to optimize for the mips4
instruction set)

=======================================================================
"If the liberal arts do nothing else, they provide engaging metaphors
 for the thinking they displace."  Roger Zelazny, Home is the Hangman
=======================================================================
                        Dave Schuller
                        modern man in a post-modern world
                        University of California-Irvine
                        schuller@uci.edu

Re: irix 5.3 executable on irix 6.2

#229

Author: Alexis Cousein
Date: Wed, 23 Oct 1996 00:00

29 lines
1774 bytes

Dave Schuller wrote:
> 
> hi,
> 
> finally got my hands on an Indigo 10000 for testing.
> It came pre-loaded with Irix 6.2.
> 
> I ran a program on it just to compare speed with our older
> R4000 machines, and was surprised to find that the output
> of the program was not verbatim identical.  The program
> executable was compiled on an Indigo R4000 under IRix 5.3.
> since it is already an executable, I don't see how compiler bugs
> could be a consideration. (compiled with f77. the program is
> magicsquash, for X-ray crystallographic phase extension.)
> 
> so what is a R10000 with Irix 6.2 doing differently with an
> Irix 5.3 executable as compared to an R4000 with Irix 5.3?
> Is some of the 32 bit math run as 64 bit or something?
> 
The program is using dynamic shared libraries for the maths, and these
*are* different. Only programs compiled with the nonshared libraries on
5.3 will not use these 6.2 libraries.

-- 
Alexis Cousein
Sales Support Engineer
Silicon Graphics NV/SA  (Belgium)
in .be domain: al@sgi.be, elsewhere:     al@brussels.sgi.com

Re: irix 5.3 executable on irix 6.2

#230

Author: Ashok Aiyar
Date: Wed, 23 Oct 1996 00:00

16 lines
1212 bytes

On 22 Oct 1996 23:27:30 GMT, Dave Schuller <schuller@indigo2.biomol.uci.edu> wrote:

>so what is a R10000 with Irix 6.2 doing differently with an
>Irix 5.3 executable as compared to an R4000 with Irix 5.3?
>Is some of the 32 bit math run as 64 bit or something?

Are the programs statically compiled or are they using shared
libraries?  I imagine that the shared libraries are different.

Later,
Ashok
-- 
Ashok Aiyar, Ph.D.
Department of Oncology            email: aiyar@ebv.oncology.wisc.edu
University of Wisconsin-Madison                  tel: (608) 262-6697

Re: irix 5.3 executable on irix 6.2

#231

Author: W.J.Jenkins
Date: Wed, 23 Oct 1996 00:00

9 lines
898 bytes

I'm wondering if it's a difference in dynamically linked
libraries?

-- 
W.J. Jenkins					email: 	wjenkins@whoi.edu
MS #25						phone:	508-289-2554
Woods Hole Oceanographic Institution		fax: 	508-457-2193
Woods Hole, MA 02543				www:	http://hil.whoi.edu

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