1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
|
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<!--Converted with LaTeX2HTML 96.1-h (September 30, 1996) by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds -->
<HTML>
<HEAD>
<TITLE>Performance Improvement</TITLE>
<META NAME="description" CONTENT="Performance Improvement">
<META NAME="keywords" CONTENT="slug">
<META NAME="resource-type" CONTENT="document">
<META NAME="distribution" CONTENT="global">
<LINK REL=STYLESHEET HREF="slug.css">
</HEAD>
<BODY LANG="EN" >
<A NAME="tex2html3795" HREF="node128.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="http://www.netlib.org/utk/icons/next_motif.gif"></A> <A NAME="tex2html3793" HREF="node104.html"><IMG WIDTH=26 HEIGHT=24 ALIGN=BOTTOM ALT="up" SRC="http://www.netlib.org/utk/icons/up_motif.gif"></A> <A NAME="tex2html3787" HREF="node126.html"><IMG WIDTH=63 HEIGHT=24 ALIGN=BOTTOM ALT="previous" SRC="http://www.netlib.org/utk/icons/previous_motif.gif"></A> <A NAME="tex2html3797" HREF="node1.html"><IMG WIDTH=65 HEIGHT=24 ALIGN=BOTTOM ALT="contents" SRC="http://www.netlib.org/utk/icons/contents_motif.gif"></A> <A NAME="tex2html3798" HREF="node190.html"><IMG WIDTH=43 HEIGHT=24 ALIGN=BOTTOM ALT="index" SRC="http://www.netlib.org/utk/icons/index_motif.gif"></A> <BR>
<B> Next:</B> <A NAME="tex2html3796" HREF="node128.html">Choosing a Faster BLACS </A>
<B>Up:</B> <A NAME="tex2html3794" HREF="node104.html">Performance of ScaLAPACK</A>
<B> Previous:</B> <A NAME="tex2html3788" HREF="node126.html">Performance Bottlenecks in the </A>
<BR> <P>
<H1><A NAME="SECTION04540000000000000000">Performance Improvement</A></H1>
<A NAME="secperfimprovement"> </A>
<A NAME="4245"> </A>
<P>
Before experimenting with different data layouts, users should make sure that
they are using the fastest BLACS and BLAS libraries.
<P>
Three major
factors influence
the performance of a
ScaLAPACK routine: the
flop rate achieved by
the BLAS on each node,
the computational
load balance, and
the communication costs.
<P>
<BR> <HR>
<UL><A NAME="CHILD_LINKS"> </A>
<LI> <A NAME="tex2html3799" HREF="node128.html#SECTION04541000000000000000">Choosing a Faster BLACS Library</A>
<LI> <A NAME="tex2html3800" HREF="node129.html#SECTION04542000000000000000">Choosing a Faster BLAS Library</A>
<LI> <A NAME="tex2html3801" HREF="node130.html#SECTION04543000000000000000">Tuning the Distribution Parameters for Better Performance</A>
</UL>
<BR> <HR>
<P><ADDRESS>
<I>Susan Blackford <BR>
Tue May 13 09:21:01 EDT 1997</I>
</ADDRESS>
</BODY>
</HTML>
|