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130 lines
6.5 KiB
HTML
130 lines
6.5 KiB
HTML
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<html >
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<head><title>Library contents</title>
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href="userhtmlse3.html" >next</a>] [<a
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href="userhtmlsu1.html" >prev</a>] [<a
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<h4 class="subsectionHead"><span class="titlemark">2.2 </span> <a
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id="x8-50002.2"></a>Library contents</h4>
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<!--l. 238--><p class="noindent" >The PSBLAS library consists of various classes of subroutines:
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<dl class="description"><dt class="description">
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<span
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class="cmbx-10">Computational routines</span> </dt><dd
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class="description">comprising:
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<ul class="itemize1">
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<li class="itemize">Sparse matrix by dense matrix product;
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</li>
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<li class="itemize">Sparse triangular systems solution for block diagonal matrices;
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</li>
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<li class="itemize">Vector and matrix norms;
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</li>
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<li class="itemize">Dense matrix sums;
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</li>
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<li class="itemize">Dot products.</li></ul>
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</dd><dt class="description">
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<span
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class="cmbx-10">Communication routines</span> </dt><dd
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class="description">handling halo and overlap communications;
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</dd><dt class="description">
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<span
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class="cmbx-10">Data management and auxiliary routines</span> </dt><dd
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class="description">including:
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<ul class="itemize1">
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<li class="itemize">Parallel environment management
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</li>
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<li class="itemize">Communication descriptors allocation;
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</li>
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<li class="itemize">Dense and sparse matrix allocation;
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</li>
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<li class="itemize">Dense and sparse matrix build and update;
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</li>
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<li class="itemize">Sparse matrix and data distribution preprocessing.</li></ul>
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</dd><dt class="description">
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<span
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class="cmbx-10">Preconditioner routines</span> </dt><dd
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class="description">
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</dd><dt class="description">
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<span
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class="cmbx-10">Iterative methods</span> </dt><dd
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class="description">a subset of Krylov subspace iterative methods</dd></dl>
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<!--l. 263--><p class="noindent" >The following naming scheme has been adopted for all the symbols internally defined in
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the PSBLAS software package:
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<ul class="itemize1">
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<li class="itemize">all symbols (i.e. subroutine names, data types...) are prefixed by <span class="obeylines-h"><span class="verb"><span
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class="cmtt-10">psb_</span></span></span>
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</li>
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<li class="itemize">all data type names are suffixed by <span class="obeylines-h"><span class="verb"><span
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class="cmtt-10">_type</span></span></span>
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</li>
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<li class="itemize">all constants are suffixed by <span class="obeylines-h"><span class="verb"><span
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class="cmtt-10">_</span></span></span>
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</li>
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<li class="itemize">all top-level subroutine names follow the rule <span class="obeylines-h"><span class="verb"><span
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class="cmtt-10">psb_xxname</span></span></span> where <span class="obeylines-h"><span class="verb"><span
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class="cmtt-10">xx</span></span></span> can be
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either:
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<ul class="itemize2">
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<li class="itemize"><span class="obeylines-h"><span class="verb"><span
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class="cmtt-10">ge</span></span></span>: the routine is related to dense data,
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</li>
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<li class="itemize"><span class="obeylines-h"><span class="verb"><span
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class="cmtt-10">sp</span></span></span>: the routine is related to sparse data,
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</li>
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<li class="itemize"><span class="obeylines-h"><span class="verb"><span
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class="cmtt-10">cd</span></span></span>: the routine is related to communication descriptor (see <a
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href="userhtmlse3.html#x12-90003">3<!--tex4ht:ref: sec:datastruct --></a>).</li></ul>
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<!--l. 278--><p class="noindent" >For example the <span class="obeylines-h"><span class="verb"><span
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class="cmtt-10">psb_geins</span></span></span>, <span class="obeylines-h"><span class="verb"><span
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class="cmtt-10">psb_spins</span></span></span> and <span class="obeylines-h"><span class="verb"><span
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class="cmtt-10">psb_cdins</span></span></span> perform the same
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action (see <a
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href="userhtmlse6.html#x40-770006">6<!--tex4ht:ref: sec:toolsrout --></a>) on dense matrices, sparse matrices and communication
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descriptors respectively. Interface overloading allows the usage of the same
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subroutine names for both real and complex data.</li></ul>
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<!--l. 285--><p class="noindent" >In the description of the subroutines, arguments or argument entries are classified
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as:
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<dl class="description"><dt class="description">
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<span
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class="cmbx-10">global</span> </dt><dd
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class="description">For input arguments, the value must be the same on all processes
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participating in the subroutine call; for output arguments the value is
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guaranteed to be the same.
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</dd><dt class="description">
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<span
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class="cmbx-10">local</span> </dt><dd
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class="description">Each process has its own value(s) independently.</dd></dl>
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<!--l. 293--><p class="noindent" >To finish our general description, we define a version string with the constant
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<center class="math-display" >
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<img
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src="userhtml0x.png" alt="psb_version_string_
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" class="math-display" ></center>
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<!--l. 295--><p class="nopar" > whose current value is <span class="obeylines-h"><span class="verb"><span
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class="cmtt-10">3.7.0</span></span></span>
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href="userhtmlse3.html" >next</a>] [<a
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href="userhtmlsu1.html" >prev</a>] [<a
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href="userhtmlsu1.html#tailuserhtmlsu1.html" >prev-tail</a>] [<a
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href="userhtmlsu2.html" >front</a>] [<a
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href="userhtmlse2.html#userhtmlsu4.html" >up</a>] </p></div>
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</body></html>
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