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diff --git a/SystemTap_Beginners_Guide/iotimesect.html b/SystemTap_Beginners_Guide/iotimesect.html index f91ec81b..d44530de 100644 --- a/SystemTap_Beginners_Guide/iotimesect.html +++ b/SystemTap_Beginners_Guide/iotimesect.html | |||
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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">5.2.2. Tracking I/O Time For Each File Read or Write</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="mainsect-disk.html" title="5.2. Disk" /><link rel="next" href="traceiosect.html" title="5.2.3. Track Cumulative IO" /></head><body><p id="title"></p><ul class="docnav top"><li class="previous"><a accesskey="p" href="mainsect-disk.html"><strong>Prev</strong></a></li><li class="home">SystemTap Beginners Guide</li><li class="next"><a accesskey="n" href="traceiosect.html"><strong>Next</strong></a></li></ul><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="iotimesect"> | 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">5.2.2. Tracking I/O Time For Each File Read or Write</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="mainsect-disk.html" title="5.2. Disk" /><link rel="next" href="traceiosect.html" title="5.2.3. Track Cumulative IO" /></head><body><p id="title"></p><ul class="docnav top"><li class="previous"><a accesskey="p" href="mainsect-disk.html"><strong>Prev</strong></a></li><li class="home">SystemTap Beginners Guide</li><li class="next"><a accesskey="n" href="traceiosect.html"><strong>Next</strong></a></li></ul><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="iotimesect"> |
| 3 | </a>5.2.2. Tracking I/O Time For Each File Read or Write</h3></div></div></div><a id="idp71893886976272" class="indexterm"></a><a id="idp71893882357456" class="indexterm"></a><a id="idp71893880875008" class="indexterm"></a><a id="idp71893878271056" class="indexterm"></a><a id="idp71893877187760" class="indexterm"></a><div class="para"> | 3 | </a>5.2.2. Tracking I/O Time For Each File Read or Write</h3></div></div></div><a id="idp70843093682336" class="indexterm"></a><a id="idp70843089055072" class="indexterm"></a><a id="idp70843095351312" class="indexterm"></a><a id="idp70843093587392" class="indexterm"></a><a id="idp70843086063536" class="indexterm"></a><div class="para"> |
| 4 | This section describes how to monitor the amount of time it takes for each process to read | 4 | This section describes how to monitor the amount of time it takes for each process to read |
| 5 | from or write to any file. This is useful to determine what files are slow to | 5 | from or write to any file. This is useful to determine what files are slow to |
| 6 | load on a given system. | 6 | load on a given system. |
| @@ -111,7 +111,7 @@ probe syscall.close { | |||
| 111 | to a file. For each file any system call accesses, <a class="xref" href="iotimesect.html#iotime">iotime.stp</a> counts the number | 111 | to a file. For each file any system call accesses, <a class="xref" href="iotimesect.html#iotime">iotime.stp</a> counts the number |
| 112 | of microseconds it takes for any reads or writes to finish and tracks the amount of data (in | 112 | of microseconds it takes for any reads or writes to finish and tracks the amount of data (in |
| 113 | bytes) read from or written to the file. | 113 | bytes) read from or written to the file. |
| 114 | </div><a id="idp71893883683120" class="indexterm"></a><a id="idp71893885212160" class="indexterm"></a><a id="idp71893879687248" class="indexterm"></a><div class="para"> | 114 | </div><a id="idp70843094109296" class="indexterm"></a><a id="idp70843098657824" class="indexterm"></a><a id="idp70843098858816" class="indexterm"></a><div class="para"> |
| 115 | <a class="xref" href="iotimesect.html#iotime">iotime.stp</a> also uses the local variable <code class="command">$count</code> to track the | 115 | <a class="xref" href="iotimesect.html#iotime">iotime.stp</a> also uses the local variable <code class="command">$count</code> to track the |
| 116 | amount of data (in bytes) that any system call <span class="emphasis"><em>attempts</em></span> to read or | 116 | amount of data (in bytes) that any system call <span class="emphasis"><em>attempts</em></span> to read or |
| 117 | write. Note that <code class="command">$return</code> (as used in <a class="xref" href="mainsect-disk.html#scriptdisktop">disktop.stp</a> from | 117 | write. Note that <code class="command">$return</code> (as used in <a class="xref" href="mainsect-disk.html#scriptdisktop">disktop.stp</a> from |