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<H2><A NAME="SECTION04132000000000000000">BLAS</A></H2>
<A NAME="secBLAS"> </A>
The <B>BLAS</B> (Basic Linear Algebra Subprograms) [<A HREF="node189.html#blas3">57</A>, <A HREF="node189.html#blas2">59</A>, <A HREF="node189.html#blas1">93</A>]
include subroutines for common linear algebra computations such as
dot-products, matrix-vector multiplication, and matrix-matrix
multiplication. As is well known, using matrix-matrix operations (in
particular, matrix multiplication)
tuned for a particular architecture can mask the effects
of the memory hierarchy<A NAME="413"> </A><A NAME="414"> </A>
(cache misses, TLB misses, etc.) and permit
floating-point operations to be performed near peak speed of the
machine. An important aim of the BLAS is to provide a portability
layer for computation.
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<P><ADDRESS>
<I>Susan Blackford <BR>
Tue May 13 09:21:01 EDT 1997</I>
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