Hi everyone,
Just trying to deduce a plan to attack a problem of mine, the basis of
which is a tiny project to be done by young slave/intern doing a singular
value decomposition (SVD) routine in Chapel. Nothing special, it is
primary targetted at small matrices, those that define the relationship
between stress and strain. This means that numerical issues with SVD and
large matrices are less critical.
With respect to advanced linear algebra libraries available for use within
one's own code, Chapel has several options.
Both BLAS and LAPACK are wrappers around ??? and LAPACK respectively. This
is great if you just want to exploit such a library. But wrappers make the
retrofitting of advances in low level routines such as Edward Anderson's
(2018 ACM TOMS) improved vector norm a non-trivial task.
The Jama port to Chapel is simple but not very extensive.
I have not gone too deeply into the LinearAlbegra project - yet. Maybe
next week.
From a philsophical standard, as opposed to the practicality of getting a
program going, isn't Chapel the sort of language that one would want to
use to write such libraries? In doing so, you might want to look at what
is being done in PLASMA.
https://bitbucket.org/icl/plasma
See also the work on LAPACK's cousin??, PLASMA which is a software package
for solving problems in dense linear algebra using multicore processors &
Xeon Phi coprocessors. PLASMA provides implementations of state-of-the-art
algorithms using cutting-edge task scheduling techniques. PLASMA currently
offers a collection of routines for solving linear systems of equations,
least squares problems, eigenvalue problems, and singular value problems.
PLASMA is in the process of porting form QUARK to OpenMP. I would have
thought that PLASMA written in Chapel would have been an interesting
comparison to this almost (??) complete alternative in OpenMP.
Regards - Damian
Pacific Engineering Systems International, 277-279 Broadway, Glebe NSW 2037
Ph:+61-2-8571-0847 .. Fx:+61-2-9692-9623 | unsolicited email not wanted here
Views & opinions here are mine and not those of any past or present employer
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