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@ -601,7 +601,7 @@ An integer value; 0 means no error has been detected.
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the assembled matrix may substantially improve performance in the
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matrix build phase, as it will reduce or eliminate the need for
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(potentially multiple) data reallocations;
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\item Using \verb|psb_matbld_remote_| will cause an overhead at
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\item Using \verb|psb_matbld_remote_| is likely to cause a runtime overhead at
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assembly time;
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\end{enumerate}
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@ -712,8 +712,7 @@ An integer value; 0 means no error has been detected.
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\item The input data can be passed in either COO or CSR formats;
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\item In COO format the coefficients to be inserted are represented by
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the ordered triples $ia(i),ja(i),val(i)$, for $i=1,\dots,nz$;
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these triples should belong to the current process, i.e. $ia(i)$
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should be one of the local indices, but are otherwise arbitrary;
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these triples are arbitrary;
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\item In CSR format the coefficients to be inserted for each input row $i=1,nr$
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are represented by the ordered triples $(i+irw-1),ja(j),val(j)$, for
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$j=irp(i),\dots,irp(i+1)-1$;
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@ -724,8 +723,11 @@ An integer value; 0 means no error has been detected.
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may be split into as many calls as desired (even in the CSR format);
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\item Coefficients from different rows may also be mixed up freely
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in a single call, according to the application needs;
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\item Any coefficients from matrix rows not owned by the calling
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process are silently ignored;
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\item Coefficients from matrix rows not owned by the calling
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process are treated according to the value of \verb|buildmode|
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specified at allocation time; if
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\verb|buildmode| was chosen as \verb|psb_matbld_remote_| the library
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will keep track of them, otherwise they are silently ignored;
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\item If the descriptor is in the assembled state, then any entries in
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the sparse matrix that would generate additional communication
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requirements are ignored;
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@ -739,7 +741,7 @@ An integer value; 0 means no error has been detected.
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\clearpage\subsection{psb\_spasb --- Sparse matrix assembly routine}
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\begin{verbatim}
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call psb_spasb(a, desc_a, info, afmt, upd, mold)
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call psb_spasb(a, desc_a, info [, afmt, upd, mold])
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\end{verbatim}
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\begin{description}
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@ -808,8 +810,9 @@ An integer value; 0 means no error has been detected.
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at allocation time, contributions defined on the current process but
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belonging to a remote process will be handled accordingly. This is
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most likely to occur in finite element applications, with
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\verb|dupl=psb_dupl_add_|; note that the descriptor will be updated,
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and there will be a runtime overhead.
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\verb|dupl=psb_dupl_add_|; it is necessary to check for possible
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updates needed in the descriptor, hence there will be a runtime
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overhead.
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\end{enumerate}
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@ -1007,7 +1010,7 @@ Scope: {\bf global}.\\
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Type: {\bf optional}.\\
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Intent: {\bf in}.\\
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Specified as: integer, possible values: \verb|psb_dupl_ovwrt_|,
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\verb|psb_dupl_add_|, \verb|psb_dupl_err_|.
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\verb|psb_dupl_add_|; \verb|psb_dupl_err_| has no effect.
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\item[buildmode] Whether to keep track of matrix entries that do not
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belong to the current process.\\
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Scope: {\bf global}.\\
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@ -1032,6 +1035,11 @@ Intent: {\bf out}.\\
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An integer value; 0 means no error has been detected.
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\end{description}
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{\par\noindent\large\bfseries Notes}
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\begin{enumerate}
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\item Using \verb|psb_matbld_remote_| is likely to cause a runtime overhead at
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assembly time;
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\end{enumerate}
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%
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%% psb_ins %%
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@ -1140,7 +1148,22 @@ Type: {\bf required} \\
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Intent: {\bf out}.\\
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An integer value; 0 means no error has been detected.
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\end{description}
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{\par\noindent\large\bfseries Notes}
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\begin{enumerate}
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\item On entry to this routine the descriptor must be in the
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assembled state, i.e. \verb|psb_cdasb| must already have been called.
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\item If the \verb|buildmode=psb_matbld_remote_| value was specified
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at allocation time, contributions defined on the current process but
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belonging to a remote process will be handled accordingly. This is
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most likely to occur in finite element applications, with
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\verb|dupl=psb_dupl_add_|.
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\end{enumerate}
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%
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%% psb_free %%
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%
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\clearpage\subsection{psb\_gefree --- Frees a dense matrix}
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Salvatore Filippone
3 years ago