50 lines
2.8 KiB
HTML
50 lines
2.8 KiB
HTML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="Performance and threaded applications" />
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<meta name="abstract" content="Job-level performance counters are updated by all the threads in a job." />
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<meta name="description" content="Job-level performance counters are updated by all the threads in a job." />
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Performance and threaded applications</title>
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</head>
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<body id="rzahwper-perco"><a name="rzahwper-perco"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Performance and threaded applications</h1>
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<div><p>Job-level performance counters are updated by all the threads in
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a job.</p>
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<div class="section"><p>The presence of multiple active threads can affect the accuracy
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of both general system counters and performance monitor specific transaction
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boundary counters. Data loss might occur as there is no automatic
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synchronization for these counters.</p>
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</div>
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<div class="section"><p>The initial thread performance information is a combination of
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thread and job-scoped data. Derived information that involves both thread
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and job-scoped data is not valid unless you total the thread-scoped data across
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all threads.</p>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzahwpcoco.htm" title="There are several performance considerations for multithreaded jobs on i5/OS.">Performance considerations in multithreaded applications</a></div>
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</div>
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</div>
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</body>
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</html> |