Re: using linux instead of osf

Scott Manley (spm@star.arm.ac.uk)
Tue, 19 Nov 1996 12:29:30 +0000

OK I'm using a UDB running linux to do lots of numerical simulation and my
experience is that linux is stable and the GNU compiler for C is efficient
enough to get me within a few percent of the performacne of an identical sytem
running OSF. But, most of my work uses floating point maths with no references
to the maths libraries. I have a pices of code which calls the trigonometric
functions many times in a tight loop and it is here that the performance
difference becomes notecable, my function intensive code runs at perhaps half
the speed of the OSF version.
Generally I would think about what your code is doing, if it relies heavily on
hte performance of the maths libaries then it will suffer when running Linux
over OSF, but whether the expected performance hit is worth the extra that you
pay for OSF is probably what you should be asking.

I've no idea about PVM however I'm just talking about C.

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