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<body class="manpage">
<div id="header">
<h1>
nvme-pred-lat-event-agg-log(1) Manual Page
</h1>
<h2>NAME</h2>
<div class="sectionbody">
<p>nvme-pred-lat-event-agg-log -
   Send Predictable Latency Event Aggregate Log Page request, returns result and log
</p>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="_synopsis">SYNOPSIS</h2>
<div class="sectionbody">
<div class="verseblock">
<pre class="content"><em>nvme pred-lat-event-agg-log</em> &lt;device&gt;
                        [--log-entries=&lt;log_entries&gt; | -e &lt;log_entries&gt;]
                        [--rae | -r] [--raw-binary | -b]
                        [--output-format=&lt;fmt&gt; | -o &lt;fmt&gt;] [--verbose | -v]</pre>
<div class="attribution">
</div></div>
</div>
</div>
<div class="sect1">
<h2 id="_description">DESCRIPTION</h2>
<div class="sectionbody">
<div class="paragraph"><p>Retrieves the NVMe Predictable Latency Event Aggregate Log Page from an
NVMe device and provides the returned structure.</p></div>
<div class="paragraph"><p>The &lt;device&gt; parameter is mandatory and may be either the NVMe character
device (ex: /dev/nvme0), or a namespace block device (ex: /dev/nvme0n1).</p></div>
<div class="paragraph"><p>On success, the returned Predictable Latency Event Aggregate Log
Page structure may be returned in one of several ways depending on
the option flags; the structure may parsed by the program and printed
in a readable format or the raw buffer may be printed to stdout for
another program to parse.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_options">OPTIONS</h2>
<div class="sectionbody">
<div class="dlist"><dl>
<dt class="hdlist1">
-e &lt;log_entries&gt;
</dt>
<dt class="hdlist1">
--log-entries=&lt;log_entries&gt;
</dt>
<dd>
<p>
        Retrieve the Predictable Latency Event Aggregate Log pending entries.
        This argument is mandatory and its success may depend on the device&#8217;s
        statistics to provide this log For More details see NVM Express 1.4 Spec.
        Section 5.14.1.11. The maximum number of log entries supported is 2044
        for the device.
</p>
</dd>
<dt class="hdlist1">
-r
</dt>
<dt class="hdlist1">
--rae
</dt>
<dd>
<p>
        Retain an Asynchronous Event.
</p>
</dd>
<dt class="hdlist1">
-b
</dt>
<dt class="hdlist1">
--raw-binary
</dt>
<dd>
<p>
        Print the raw Predictable Latency Event Aggregate log buffer to stdout.
</p>
</dd>
<dt class="hdlist1">
-o &lt;fmt&gt;
</dt>
<dt class="hdlist1">
--output-format=&lt;fmt&gt;
</dt>
<dd>
<p>
        Set the reporting format to <em>normal</em>, <em>json</em>, or <em>binary</em>.
        Only one output format can be used at a time.
</p>
</dd>
</dl></div>
</div>
</div>
<div class="sect1">
<h2 id="_examples">EXAMPLES</h2>
<div class="sectionbody">
<div class="ulist"><ul>
<li>
<p>
Print the Predictable Latency Event Aggregate Log page in a human readable format:
</p>
<div class="listingblock">
<div class="content">
<pre><code># nvme pred-lat-event-agg-log /dev/nvme0</code></pre>
</div></div>
</li>
<li>
<p>
Print the raw Predictable Latency Event Aggregate log to a file:
</p>
<div class="listingblock">
<div class="content">
<pre><code># nvme pred-lat-event-agg-log /dev/nvme0 --raw-binary &gt; pred_lat_agg_log.raw</code></pre>
</div></div>
<div class="paragraph"><p>It is probably a bad idea to not redirect stdout when using this mode.</p></div>
</li>
</ul></div>
</div>
</div>
<div class="sect1">
<h2 id="_nvme">NVME</h2>
<div class="sectionbody">
<div class="paragraph"><p>Part of the nvme-user suite</p></div>
</div>
</div>
</div>
<div id="footnotes"><hr /></div>
<div id="footer">
<div id="footer-text">
Last updated
 2025-11-19 00:00:00 UTC
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