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Re: Hardware considerations and Octave

From: Dmitri A. Sergatskov
Subject: Re: Hardware considerations and Octave
Date: Fri, 29 Apr 2005 13:50:15 -0600
User-agent: Mozilla Thunderbird (X11/20050322)

Joan Picanyol i Puig wrote:
* Steve C. Thompson <address@hidden> [20050429 20:33]:

I'm thinking about getting a new workstation, and am finding many
options.  I run Octave Debian GNU/Linux (testing).  Will my work run
better on a dual core processor?  A dual processor system?  I image that
the kernel just needs to be modified to support this type of hardware;
and Octave, and the entire system, will just run faster.

I'm afraid this is not so. I can't get my dual Athlon-MP system to
effectively use both processors for Octave (I'm on FreeBSD, YMMV).

I had compiled octave against multithreaded ATLAS and that speeds up some
matrix manipulations by almost 90%. But for some operations this also imposes
some penalty (due to thread spawning overhead, I guess). So do not expect
2x speedup.

Another advantage of dual system if you plot (and replot)
large data sets. Since gnuplot runs as a separate process it can use
a second cpu. Also compiling stuff on dual CPU is a little faster.


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