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| The primary function of the <var class="product">SirTune</var> product is to provide information
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| to User Language programmers to make it easy for them to
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| improve the performance of their programs.
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| This is accomplished in two stages:
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| <ol>
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| <li>Data is collected in a running Online or <var>BATCH204</var> region.
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| This data is obtained by "polling."
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| That is, at regular intervals <var class="product">SirTune</var> examines the state of the Online.
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| or <var>BATCH204</var> region and records data pertinent to this state.
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| <p>
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| The part of <var class="product">SirTune</var> that collects this data is called the
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| <b>data collection</b> portion, which
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| is integrated with the <var class="product">[[Sirius Mods]]</var> for <var class="product">SirTune</var> versions after 1.5, or which
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| consists of a separately distributed load module named <b>SIRTUNE</b>
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| for <var class="product">SirTune</var> 1.5 and earlier versions. </p>
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| <li>After this data is collected, it is summarized and presented
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| in a set of reports that indicate to a User Language programmer the
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| potential performance problem areas.
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| These problem areas can generally be refined to an arbitrary level of
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| detail (for example, individual lines of code in a procedure).
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| <p>
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| The part of <var class="product">SirTune</var> that summarizes and produces reports is called the
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| <b>reporting</b> portion, which consists of a User Language program
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| named <var>SIRTUNEREPORT</var>, distributed in the SIRIUS file as part of <var class="product">User Language</var>.</p>
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| <p>
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| Pre-7.2 releases required a separate reporting load module
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| distributed under the name <var>SIRTUNER</var>.</p>
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| For more information about SirTune, see the <var class="book">[http://m204wiki.rocketsoftware.com/images/a/ac/TunrNew.pdf SirTune Reference Manual]</var>.
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| [[Category:Sirius Software products]]
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