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| 1 | <?xml version="1.0" encoding="UTF-8" standalone="no"?> | 1 | <?xml version="1.0" encoding="UTF-8" standalone="no"?> |
| 2 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title xmlns:d="http://docbook.org/ns/docbook">5.2.3. Track Cumulative IO</title><link rel="stylesheet" type="text/css" href="Common_Content/css/default.css" /><link rel="stylesheet" media="print" href="Common_Content/css/print.css" type="text/css" /><meta xmlns:d="http://docbook.org/ns/docbook" name="generator" content="publican v4.1.3" /><meta xmlns:d="http://docbook.org/ns/docbook" name="package" content="SystemTap-SystemTap_Beginners_Guide-2.7-en-US-2.0-1" /><link rel="home" href="index.html" title="SystemTap Beginners Guide" /><link rel="up" href="mainsect-disk.html" title="5.2. Disk" /><link rel="prev" href="iotimesect.html" title="5.2.2. Tracking I/O Time For Each File Read or Write" /><link rel="next" href="traceio2sect.html" title="5.2.4. I/O Monitoring (By Device)" /></head><body><p id="title"><a class="left" href="https://fedorahosted.org/publican"><img alt="Product Site" src="Common_Content/images//image_left.png" /></a><a class="right" href="https://fedorahosted.org/publican"><img alt="Documentation Site" src="Common_Content/images//image_right.png" /></a></p><ul class="docnav top"><li class="previous"><a accesskey="p" href="iotimesect.html"><strong>Prev</strong></a></li><li class="home">SystemTap Beginners Guide</li><li class="next"><a accesskey="n" href="traceio2sect.html"><strong>Next</strong></a></li></ul><div xml:lang="en-US" class="section" lang="en-US"><div class="titlepage"><div><div><h3 class="title"><a id="traceiosect"> | 2 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title xmlns:d="http://docbook.org/ns/docbook">5.2.3. Track Cumulative IO</title><link rel="stylesheet" type="text/css" href="Common_Content/css/default.css" /><link rel="stylesheet" media="print" href="Common_Content/css/print.css" type="text/css" /><meta xmlns:d="http://docbook.org/ns/docbook" name="generator" content="not publican" /><meta xmlns:d="http://docbook.org/ns/docbook" name="package" content="" /><link rel="home" href="index.html" title="SystemTap Beginners Guide" /><link rel="up" href="mainsect-disk.html" title="5.2. Disk" /><link rel="prev" href="iotimesect.html" title="5.2.2. Tracking I/O Time For Each File Read or Write" /><link rel="next" href="traceio2sect.html" title="5.2.4. I/O Monitoring (By Device)" /></head><body><p id="title"></p><ul class="docnav top"><li class="previous"><a accesskey="p" href="iotimesect.html"><strong>Prev</strong></a></li><li class="home">SystemTap Beginners Guide</li><li class="next"><a accesskey="n" href="traceio2sect.html"><strong>Next</strong></a></li></ul><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="traceiosect"> |
| 3 | </a>5.2.3. Track Cumulative IO</h3></div></div></div><a id="idm47748220185904" class="indexterm"></a><a id="idm47748175080768" class="indexterm"></a><a id="idm47748183091184" class="indexterm"></a><a id="idm47748183056160" class="indexterm"></a><a id="idm47748180437728" class="indexterm"></a><a id="idm47748230864960" class="indexterm"></a><div class="para"> | 3 | </a>5.2.3. Track Cumulative IO</h3></div></div></div><a id="idm140174741723040" class="indexterm"></a><a id="idm140174741938240" class="indexterm"></a><a id="idm140174736492576" class="indexterm"></a><a id="idm140174741722688" class="indexterm"></a><a id="idm140174741605488" class="indexterm"></a><a id="idm140174740479248" class="indexterm"></a><div class="para"> |
| 4 | This section describes how to track the cumulative amount of I/O to the system. | 4 | This section describes how to track the cumulative amount of I/O to the system. |
| 5 | </div><div class="para"><div xmlns:d="http://docbook.org/ns/docbook" class="title">traceio.stp</div> | 5 | </div><div class="para"><div xmlns:d="http://docbook.org/ns/docbook" class="title">traceio.stp</div> |
| 6 | |||
| 7 | <pre class="programlisting">#! /usr/bin/env stap | 6 | <pre class="programlisting">#! /usr/bin/env stap |
| 8 | # traceio.stp | 7 | # traceio.stp |
| 9 | # Copyright (C) 2007 Red Hat, Inc., Eugene Teo <eteo@redhat.com> | 8 | # Copyright (C) 2007 Red Hat, Inc., Eugene Teo <eteo@redhat.com> |
| @@ -54,11 +53,15 @@ probe timer.s(1) { | |||
| 54 | # so the values are cumulative since the script started. | 53 | # so the values are cumulative since the script started. |
| 55 | } | 54 | } |
| 56 | </pre> | 55 | </pre> |
| 57 | </div><div class="para"> | 56 | </div><div class="para"> |
| 58 | <a class="xref" href="traceiosect.html#traceio">traceio.stp</a> prints the top ten executables generating I/O traffic over time. In addition, it also tracks the cumulative amount of I/O reads and writes done by those ten executables. This information is tracked and printed out in 1-second intervals, and in descending order. | 57 | <a class="xref" href="traceiosect.html#traceio">traceio.stp</a> prints the top ten executables generating I/O traffic over time. In |
| 59 | </div><a id="idm47748220256464" class="indexterm"></a><a id="idm47748226105888" class="indexterm"></a><a id="idm47748226191072" class="indexterm"></a><div class="para"> | 58 | addition, it also tracks the cumulative amount of I/O reads and writes done by those ten |
| 60 | Note that <a class="xref" href="traceiosect.html#traceio">traceio.stp</a> also uses the local variable <code class="command">$return</code>, which is also used by <a class="xref" href="mainsect-disk.html#scriptdisktop">disktop.stp</a> from <a class="xref" href="mainsect-disk.html#disktop">Section 5.2.1, “Summarizing Disk Read/Write Traffic”</a>. | 59 | executables. This information is tracked and printed out in 1-second intervals, and in |
| 61 | </div><div class="example"><a id="traceiooutput"> | 60 | descending order. |
| 61 | </div><a id="idm140174742490864" class="indexterm"></a><a id="idm140174732834160" class="indexterm"></a><a id="idm140174733356160" class="indexterm"></a><div class="para"> | ||
| 62 | Note that <a class="xref" href="traceiosect.html#traceio">traceio.stp</a> also uses the local variable <code class="command">$return</code>, | ||
| 63 | which is also used by <a class="xref" href="mainsect-disk.html#scriptdisktop">disktop.stp</a> from <a class="xref" href="mainsect-disk.html#disktop">Section 5.2.1, “Summarizing Disk Read/Write Traffic”</a>. | ||
| 64 | </div><div class="example"><a id="traceiooutput"> | ||
| 62 | </a><p class="title"><strong>Example 5.8. <a class="xref" href="traceiosect.html#traceio">traceio.stp</a> Sample Output</strong></p><div class="example-contents"><pre class="screen">[...] | 65 | </a><p class="title"><strong>Example 5.8. <a class="xref" href="traceiosect.html#traceio">traceio.stp</a> Sample Output</strong></p><div class="example-contents"><pre class="screen">[...] |
| 63 | Xorg r: 583401 KiB w: 0 KiB | 66 | Xorg r: 583401 KiB w: 0 KiB |
| 64 | floaters r: 96 KiB w: 7130 KiB | 67 | floaters r: 96 KiB w: 7130 KiB |