File: profile.xml

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<?xml version="1.0" encoding="ISO-8859-1"?>
<!--
 * Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
 * Copyright (C) ????-2008 - INRIA
 *
 * This file must be used under the terms of the CeCILL.
 * This source file is licensed as described in the file COPYING, which
 * you should have received as part of this distribution.  The terms
 * are also available at
 * http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
 *
 -->
<refentry version="5.0-subset Scilab" xml:id="profile" xml:lang="en"
          xmlns="http://docbook.org/ns/docbook"
          xmlns:xlink="http://www.w3.org/1999/xlink"
          xmlns:svg="http://www.w3.org/2000/svg"
          xmlns:ns4="http://www.w3.org/1999/xhtml"
          xmlns:mml="http://www.w3.org/1998/Math/MathML"
          xmlns:db="http://docbook.org/ns/docbook">
  <info>
    <pubdate>$LastChangedDate$</pubdate>
  </info>

  <refnamediv>
    <refname>profile</refname>

    <refpurpose>extrai profiles (dossis) de execuo de uma funo do
    Scilab</refpurpose>
  </refnamediv>

  <refsynopsisdiv>
    <title>Seqncia de Chamamento</title>

    <synopsis>c=profile(fun)</synopsis>
  </refsynopsisdiv>

  <refsection>
    <title>Parmetro</title>

    <variablelist>
      <varlistentry>
        <term>fun</term>

        <listitem>
          <para>funo Scilab</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>c</term>

        <listitem>
          <para>uma matriz nx3 contendo os profiles de execuo</para>
        </listitem>
      </varlistentry>
    </variablelist>
  </refsection>

  <refsection>
    <title>Descrio</title>

    <para>Para utilizar <literal>profile</literal> a funo Scilab deve ter
    sido preparada para profiling (anlise de desempenho) (ver exec).</para>

    <para>Pata tal funo, quando tal funo  executada, o sistema conta
    quantas vezes cada linha foi executada e quanto tempo de cpu foi gasto
    para cada execuo da linha. Estes dados so armazenados na estrutura de
    dados da funo. A funo profile permite extrair esses dados e
    retorn-los nas duas primeiras colunas de <literal>c</literal>. A terceira
    coluna de <literal>c</literal> fornece a medida do esforo do
    interpretador para a execuo da linha correspondente. A i-sima linha de
    <literal>c</literal> corresponde  i-sima linha da funo (inclusa
    primeiro)</para>

    <para>Note que, devido  preciso do clock do processador (tipicamente, um
    microssegundo), algumas linhas executadas aparecem com tempo de execuo
    0, mesmo que o tempo de execuo de cpu total realmente gasto seja
    grande.</para>
  </refsection>

  <refsection>
    <title>Exemplos</title>

    <programlisting role="example"><![CDATA[ 
//definindo a funo e preparando-a para profiling
deff('x=foo(n)',['if n==0 then'
                 '  x=[]'
                 'else'
                 '  x=0'
                 '  for k=1:n'
                 '    s=svd(rand(n+10,n+10))'
                 '    x=x+s(1)'
                 '  end'
                 'end'],'p')
//chamando a funo
foo(10)
//obtendo profiles de execuo
profile(foo)
//chamando a funo
foo(20)
profile(foo) //a execuo de profiles  acumulada
 ]]></programlisting>
  </refsection>

  <refsection>
    <title>Ver Tambm</title>

    <simplelist type="inline">
      <member><link linkend="exec">exec</link></member>

      <member><link linkend="deff">deff</link></member>

      <member><link linkend="plotprofile">plotprofile</link></member>

      <member><link linkend="showprofile">showprofile</link></member>
    </simplelist>
  </refsection>
</refentry>