Extract code to display details from code to analyse/split the OOM. This should simplify later extensions as well as later written unit tests.
		
			
				
	
	
		
			633 lines
		
	
	
		
			21 KiB
		
	
	
	
		
			HTML
		
	
	
	
	
	
			
		
		
	
	
			633 lines
		
	
	
		
			21 KiB
		
	
	
	
		
			HTML
		
	
	
	
	
	
<!DOCTYPE html>
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<html lang="en">
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<head>
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    <script src="__javascript__/OOMAnalyser.js" defer="defer"></script>
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    <meta charset="UTF-8">
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    <title>OOM Analyser</title>
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    <style type='text/css'>
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        h1 {
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            font-size: 2em;
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            margin: 0.67em 0;
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        }
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        #notify_box {
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            display: none;
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            width: 100%;
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        }
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        .kbytes {
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            text-align: right;
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        }
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        .kbytes::after {
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            content: " kBytes";
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        }
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        .pages {
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            text-align: right;
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        }
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        .pages::after {
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            content: " pages";
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        }
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        .align_right {
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            text-align: right;
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        }
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        .hide_tablerow {
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            display: none;
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        }
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        .click_msg_in_th {
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            font-size: small;
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            font-weight: unset;
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            padding: unset;
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        }
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        table {
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            border-collapse: collapse;
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            padding: 10px;
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            table-layout: fixed;
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            text-align: left;
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            width: 100%;
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        }
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        svg {
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            display: block;
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            max-height: 200px;
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        }
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        th {
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            font-weight: bold;
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            font-size: large;
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            padding: 5px;
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        }
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        th, td {
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            border: 1px solid black;
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            word-wrap: break-word;
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        }
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        .terminal {
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            font-family: monospace;
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            overflow: auto;
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        }
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        .notify-warning {
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	        color: #9F6000;
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	        background-color: #FEEFB3;
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	    }
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	    .notify-error {
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	        color: #D8000C;
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    	    background-color: #FFD2D2;
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	    }
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        /* Zebra-Layout */
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        tr:nth-child(odd) td:nth-child(2), tr:nth-child(odd) td:nth-child(3) {
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            background-color: #f2f2f2;
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        }
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        .license {
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            font-size: small;
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            display: none;
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        }
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    </style>
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    <script>
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function goBack() {
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    window.history.back();
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}
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    </script>
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</head>
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<body>
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<h1>Analyse and visualise Linux OOM output</h1>
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<p>
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    This web page analyses Linux Out Of Memory (OOM) messages and shows these
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    information in a human friendly presentation.
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</p>
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<p>
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    Your input will be analysed locally - in your browser - by an integrated
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    JavaScript script without transferring your data to foreign servers.
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</p>
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<div id="input">
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    <h2>Step 1 - Enter your OOM message</h2>
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    <textarea id="textarea_oom" cols="100" rows="20" autocomplete="off" title="OOM input field">Add your OOMhere</textarea>
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    <br/>
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    <button onclick="OOMAnalyser.OOMDisplayInstance.analyse_and_show()" title="Analyse the OOM from the input area and show it">Analyse</button>
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    <button onclick="OOMAnalyser.OOMDisplayInstance.reset_form()" title="Clean the input area">Reset</button>
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    <button onclick="OOMAnalyser.OOMDisplayInstance.copy_example_to_form()" title="Copy an example OOM into the input area">Insert example</button>
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</div>
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<p>
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    <div class="terminal" id="notify_box"></div>
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</p>
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<div id="analysis">
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<h2>Step 2 - Results</h2>
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    <p>
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        Go back to
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        <a href="javascript:void(0);" onclick="OOMAnalyser.OOMDisplayInstance.reset_form()" title="Run a new analysis">"Step 1 - Enter your OOM message"</a>
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        to run a new analysis.
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    </p>
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    <p>
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        The result of the analysis is displayed in three columns. The first column is used to name the property
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        including the original OOM identifier in brackets. The extracted information is displayed in the second column.
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        The last column contains further details and additional information.
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    </p>
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    <table>
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        <!--
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        <thead>
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        <tr>
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            <th scope="col"></th>
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            <th scope="col">Entry</th>
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            <th scope="col">Description</th>
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        </tr>
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        </thead>
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        -->
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        <tbody>
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        <!-- Trigger process -->
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        <tr>
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            <th scope="row" colspan="3">Tigger Process</th>
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        </tr>
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        <tr>
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            <td></td>
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            <td class="align_right"><span id="trigger_proc_name"></span> (PID <span id="trigger_proc_pid"></span>)</td>
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            <td>This process requests memory and is triggering thereby the OOM situation</td>
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        </tr>
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        <tr>
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            <td>Memory allocation flags<br>(gfp_mask)</td>
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            <td id="trigger_proc_gfp_mask" class="align_right"></td>
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            <td>These flags are used to control the kernel internal memory allocation<br>
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                GFP stands for <code>__get_free_pages()</code> </td>
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        </tr>
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        <tr>
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            <td>Node mask to show on which CPU Cores this process can run<br>(nodemask)</td>
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            <td id="trigger_proc_nodemask" class="align_right"></td>
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            <td>Bit mask indicating the cores on which the process can run</td>
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        </tr>
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        <tr>
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            <td>Requested memory<br>(order)</td>
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            <td class="align_right">
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                <span id="trigger_proc_requested_memory"></span> (2^<sup><span id="trigger_proc_order"></span></sup>) pages /
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                <span class="kbytes" id="trigger_proc_requested_memory_kbytes"></span>
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            </td>
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            <td>The kernel specifies the requested number of pages as exponent of power of two.
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        </tr>
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        <tr>
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            <td>Adjust oom-killer score<br>(oom_score_adj)</td>
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            <td id="trigger_proc_oomscore" class="align_right"></td>
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            <td>
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                This value is added to the badness score before it's used to determine the process to be killed.
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            </td>
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        </tr>
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        <!-- Killed Process -->
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        <tr>
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            <th scope="row" colspan="3">Killed Process</th>
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        </tr>
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        <tr>
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            <td></td>
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            <td class="align_right"><span id="killed_proc_name"></span> (PID <span id="killed_proc_pid"></span>)</td>
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            <td>Process killed by Linux kernel to satisfy the memory request</td>
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        </tr>
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        <tr>
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            <td>OOM Score<br>(score)</td>
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            <td id="killed_proc_score" class="align_right"></td>
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            <td></td>
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        </tr>
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        <tr>
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            <td>Virtual Memory <br> (total-vm) </td>
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            <td id="killed_proc_vm_kb" class="kbytes"></td>
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            <td>Virtual memory used by this process</td>
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        </tr>
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        <tr>
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            <td>Resident anonymous memory <br> (anon-rss) </td>
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            <td id="killed_proc_anon_rss_kb" class="kbytes"></td>
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            <td>Part of the virtual process memory mapped into RAM</td>
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        </tr>
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        <tr>
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            <td>Resident file mapping memory <br> (file-rss) </td>
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            <td id="killed_proc_file_rss_kb" class="kbytes"></td>
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            <td>Files which have been mapped into RAM (with
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                <a href="http://man7.org/linux/man-pages/man2/mmap.2.html">mmap(2)</a>)
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            </td>
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        </tr>
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        <tr>
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            <td>Resident shared memory <br> (shmem-rss) </td>
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            <td id="killed_proc_shmem_rss_kb" class="kbytes"></td>
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            <td>This may include System V shared memory and shared anonymous memory</td>
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        </tr>
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        <!-- Memory Usage Graphs -->
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        <tr>
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            <th scope="row" colspan="3">Memory Usage Graphs</th>
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        </tr>
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        <tr>
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            <td style="font-weight: bold">RAM Summary</td>
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            <td colspan="2"><div id="svg_ram"></div></td>
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        </tr>
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        <tr>
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            <td style="font-weight: bold">Swap Summary</td>
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            <td colspan="2"><div id="svg_swap"></div></td>
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        </tr>
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        <!-- Page Usage -->
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        <tr>
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            <td style="font-weight: bold">Memory Pages</td>
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            <td></td>
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            <td></td>
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        </tr>
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        <tr>
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            <td>RAM pages</td>
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            <td id="ram_pages" class="pages"></td>
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            <td>Total number of RAM pages
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            </td>
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        </tr>
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        <tr>
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            <td>HighMem/MovableOnly</td>
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            <td id="highmem_pages" class="pages"></td>
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            <td>Number of pages in the High Memory Area or marked movable for Contiguous Memory Allocator (CMA).
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                <br>
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                HighMem pages are also counted in the total page number.
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            </td>
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        </tr>
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        <tr>
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            <td>Reserved pages</td>
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            <td id="reserved_pages" class="pages"></td>
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            <td>Number of reserved pages
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            </td>
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        </tr>
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        <tr>
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            <td>CMA reserved pages</td>
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            <td id="cma_pages" class="pages">0</td>
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            <td>Pages reserved for Contiguous Memory Allocator (CMA)
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            </td>
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        </tr>
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        <tr>
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            <td>Pagetable Cache</td>
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            <td id="pagetablecache_pages" class="pages">0</td>
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            <td>Number of pages in pagetable cache
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            </td>
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        </tr>
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        <tr>
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            <td>Number of pages with hardware errors</td>
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            <td id="hwpoisoned_pages" class="pages">0</td>
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            <td>Pages with uncorrectable memory errors
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            </td>
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        </tr>
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        <!-- Memory Usage Details -->
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        <tr>
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            <td style="font-weight: bold">Memory Usage Details</td>
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            <td></td>
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            <td></td>
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        </tr>
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        <tr>
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            <td>Active anonymous memory <br> (active_anon) </td>
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            <td id="active_anon_pages" class="pages"></td>
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            <td>Recently used anonymous memory.<br>
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                These memory pages will usually not swapped out.
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            </td>
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        </tr>
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        <tr>
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            <td>Inactive anonymous memory <br> (inactive_anon)</td>
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            <td id="inactive_anon_pages" class="pages"></td>
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            <td>Least recently used anonymous memory.<br>
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                These memory pages can be swapped out.
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            </td>
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        </tr>
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        <tr>
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            <td>Isolated anonymous memory <br> (isolated_anon)</td>
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            <td id="isolated_anon_pages" class="pages"></td>
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            <td>Memory isolation is used to separate memory between different virtual machines.</td>
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        </tr>
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        <tr>
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            <td>Active Pagecache <br> (active_file)</td>
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            <td id="active_file_pages" class="pages"></td>
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            <td>Pagecache that has been used more recently and usually not reclaimed unless absolutely necessary.</td>
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        </tr>
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        <tr>
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            <td>Inactive Pagecache <br> (inactive_file)</td>
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            <td id="inactive_file_pages" class="pages"></td>
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            <td>Pagecache which has been less recently used. It can be reclaimed without huge performance impact.</td>
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        </tr>
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        <tr>
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            <td>Isolated Pagecache <br> (isolated_file)</td>
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            <td id="isolated_file_pages" class="pages"></td>
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            <td>Memory isolation is used to separate memory between different virtual machines.</td>
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        </tr>
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        <tr>
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            <td>Unevictable Pages <br> (unevictable)</td>
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            <td id="unevictable_pages" class="pages"></td>
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            <td>Unevictable memory. It can't be swapped out because the pages are owned by ramfs or protected by
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                <a href="http://man7.org/linux/man-pages/man3/mlock.5.html" target="_blank">mlock(3)</a> /
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                <a href="http://man7.org/linux/man-pages/man2/shmctl.2.html" target="_blank">shmctl(SHM_LOCK)</a>.
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                Unevictable pages are managed by kernels LRU framework.
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            </td>
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        </tr>
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        <tr>
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            <td>Dirty Pages <br> (dirty)</td>
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            <td id="dirty_pages" class="pages"></td>
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            <td>Memory which is waiting to get written back to the disk.
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                <sup><a href="#footnote-proc5">[1]</a></sup>
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            </td>
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        </tr>
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        <tr>
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            <td>Writeback <br> (writeback)</td>
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            <td id="writeback_pages" class="pages"></td>
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            <td>
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                Memory which is actively being written back to the disk.
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                <sup><a href="#footnote-proc5">[1]</a></sup>
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            </td>
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        </tr>
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        <tr>
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            <td>Unstable <br> (unstable)</td>
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            <td id="unstable_pages" class="pages"></td>
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            <td>Not yet committed to stable storage.</td>
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        </tr>
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        <tr>
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            <td>Slab Reclaimable <br> (slab_reclaimable)</td>
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            <td id="slab_reclaimable_pages" class="pages"></td>
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            <td>
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                Slab is a in-kernel data structures cache. Part of Slab, that might be reclaimed, such as caches.
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                <sup><a href="#footnote-proc5">[1]</a></sup>
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                <br>
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                Additional details are listed in
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                <a href="http://man7.org/linux/man-pages/man5/slabinfo.5.html" target="_blank">slabinfo(5)</a> also.
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            </td>
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        </tr>
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        <tr>
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            <td>Slab Unreclaimable <br> (slab_unreclaimable)</td>
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            <td id="slab_unreclaimable_pages" class="pages"></td>
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            <td>
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                Part of Slab, that cannot be reclaimed on memory pressure.
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                <sup><a href="#footnote-proc5">[1]</a></sup>
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            </td>
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        </tr>
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        <tr>
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            <td>Mapped <br> (mapped)</td>
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            <td id="mapped_pages" class="pages"></td>
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            <td>
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                Files which have been mapped into memory (with
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                <a href="http://man7.org/linux/man-pages/man2/mmap.2.html">mmap(2)</a>), such as libraries.
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                <sup><a href="#footnote-proc5">[1]</a></sup>
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            </td>
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        </tr>
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        <tr>
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            <td>Shared Memory <br> (shmem)</td>
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            <td id="shmem_pages" class="pages"></td>
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            <td>
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                Amount of memory consumed in
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                <a href="http://man7.org/linux/man-pages/man5/tmpfs.5.html">tmpfs(5)</a>
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                filesystems.
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                <sup><a href="#footnote-proc5">[1]</a></sup>
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            </td>
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        </tr>
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        <tr>
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            <td>Pagetables <br> (pagetables)</td>
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            <td id="pagetables_pages" class="pages"></td>
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            <td>
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                Amount of memory dedicated to the lowest level of pagetables.
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                <sup><a href="#footnote-proc5">[1]</a></sup>
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            </td>
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        </tr>
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        <tr>
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            <td>Bounce <br> (bounce)</td>
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            <td id="bounce_pages" class="pages"></td>
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            <td>
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                Memory used for block device "bounce buffers".
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                <sup><a href="#footnote-proc5">[1]</a></sup>
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            </td>
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        </tr>
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        <tr>
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            <td>free <br> (free)</td>
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            <td id="free_pages" class="pages"></td>
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            <td></td>
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        </tr>
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        <tr>
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            <td>free_pcp <br> (free_pcp)</td>
 | 
						||
            <td id="free_pcp_pages" class="pages"></td>
 | 
						||
            <td></td>
 | 
						||
        </tr>
 | 
						||
        <tr>
 | 
						||
            <td>free_cma <br> (free_cma)</td>
 | 
						||
            <td id="free_cma_pages" class="pages"></td>
 | 
						||
            <td></td>
 | 
						||
        </tr>
 | 
						||
        <tr>
 | 
						||
            <td>Total Pagecache</td>
 | 
						||
            <td id="pagecache_total_pages" class="pages"></td>
 | 
						||
            <td></td>
 | 
						||
        </tr>
 | 
						||
 | 
						||
        <!-- Swap Usage -->
 | 
						||
 | 
						||
        <tr>
 | 
						||
            <td style="font-weight: bold">Swap Usage</td>
 | 
						||
            <td></td>
 | 
						||
            <td></td>
 | 
						||
        </tr>
 | 
						||
        <tr>
 | 
						||
            <td>Swap Total</td>
 | 
						||
            <td id="swap_total_kb" class="kbytes"></td>
 | 
						||
            <td>Total amount of swap space available.
 | 
						||
                <sup><a href="#footnote-proc5">[1]</a></sup>
 | 
						||
            </td>
 | 
						||
        </tr>
 | 
						||
        <tr>
 | 
						||
            <td>Swap Free</td>
 | 
						||
            <td id="swap_free_kb" class="kbytes"></td>
 | 
						||
            <td>Amount of swap space that is currently unused.
 | 
						||
                <sup><a href="#footnote-proc5">[1]</a></sup>
 | 
						||
            </td>
 | 
						||
        </tr>
 | 
						||
        <tr>
 | 
						||
            <td>Swap Cached</td>
 | 
						||
            <td id="swap_cache_kb" class="kbytes"></td>
 | 
						||
            <td>Memory that once was swapped out, is swapped back in
 | 
						||
                but still also is in the swap file.  (If memory pres‐
 | 
						||
                sure is high, these pages don't need to be swapped out
 | 
						||
                again because they are already in the swap file.  This
 | 
						||
                saves I/O).
 | 
						||
                <sup><a href="#footnote-proc5">[1]</a></sup>
 | 
						||
            </td>
 | 
						||
        </tr>
 | 
						||
        <tr>
 | 
						||
            <td>Swap Used</td>
 | 
						||
            <td id="swap_used_kb" class="kbytes"></td>
 | 
						||
            <td>Amount of used swap space w/o cached swap <br>
 | 
						||
                (<code>SwapUsed = SwapTotal - SwapFree -SwapCache</code>)
 | 
						||
            </td>
 | 
						||
        </tr>
 | 
						||
 | 
						||
        <!-- Operating System -->
 | 
						||
 | 
						||
        <tr>
 | 
						||
            <th scope="row" colspan="3">Operating System</th>
 | 
						||
        </tr>
 | 
						||
        <tr>
 | 
						||
            <td>Kernel</td>
 | 
						||
            <td id="kernel_version" class="align_right"></td>
 | 
						||
            <td></td>
 | 
						||
        </tr>
 | 
						||
        <tr>
 | 
						||
            <td>Distribution</td>
 | 
						||
            <td id="dist" class="align_right"></td>
 | 
						||
            <td>Guessed from the kernel version</td>
 | 
						||
        </tr>
 | 
						||
        <tr>
 | 
						||
            <td>Platform</td>
 | 
						||
            <td id="platform" class="align_right"></td>
 | 
						||
            <td>Guessed from the kernel version</td>
 | 
						||
        </tr>
 | 
						||
        <tr>
 | 
						||
            <td>Page size</td>
 | 
						||
            <td id="page_size" class="kbytes"></td>
 | 
						||
            <td>Guessed</td>
 | 
						||
        </tr>
 | 
						||
 | 
						||
 | 
						||
        <!-- Memory Chunks -->
 | 
						||
 | 
						||
        <tr>
 | 
						||
            <th scope="row" colspan="3">Memory Chunks</th>
 | 
						||
        </tr>
 | 
						||
        <tr>
 | 
						||
            <td></td>
 | 
						||
            <td colspan="2" class="terminal">
 | 
						||
                <pre id="mem_node_info"></pre>
 | 
						||
            </td>
 | 
						||
        </tr>
 | 
						||
 | 
						||
        <tr>
 | 
						||
            <th scope="row" colspan="3">Process Table</th>
 | 
						||
        </tr>
 | 
						||
        <tr>
 | 
						||
            <td></td>
 | 
						||
            <td colspan="2" class="terminal">
 | 
						||
                <pre id="process_table"></pre>
 | 
						||
            </td>
 | 
						||
        </tr>
 | 
						||
 | 
						||
        <!-- Hardware Details -->
 | 
						||
 | 
						||
        <tr>
 | 
						||
            <th scope="row" colspan="3">Hardware Details</th>
 | 
						||
        </tr>
 | 
						||
        <tr>
 | 
						||
            <td></td>
 | 
						||
            <td colspan="2" class="terminal">
 | 
						||
                <pre id="hardware_info"></pre>
 | 
						||
            </td>
 | 
						||
        </tr>
 | 
						||
 | 
						||
        <!-- Kernel Call Tree -->
 | 
						||
 | 
						||
        <tr>
 | 
						||
            <th scope="row" colspan="3">Kernel Call Trace</th>
 | 
						||
        </tr>
 | 
						||
        <tr>
 | 
						||
            <td></td>
 | 
						||
            <td colspan="2" class="terminal">
 | 
						||
                <pre id="call_trace"></pre>
 | 
						||
            </td>
 | 
						||
        </tr>
 | 
						||
 | 
						||
        <!-- Initial OOM -->
 | 
						||
 | 
						||
        <tr>
 | 
						||
            <th scope="row" colspan="3">Entire OOM Message
 | 
						||
                <span class="click_msg_in_th">
 | 
						||
                    <a href="javascript:void(0);" id="oom_toogle_msg" onclick="OOMAnalyser.OOMDisplayInstance.toggle_oom()" title="Click to show/hide full OOM message">(click to hide)</a>
 | 
						||
                </span>
 | 
						||
            </th>
 | 
						||
        </tr>
 | 
						||
        <tr>
 | 
						||
            <td></td>
 | 
						||
            <td colspan="2" class="terminal">
 | 
						||
                <pre id="oom"></pre>
 | 
						||
            </td>
 | 
						||
        </tr>
 | 
						||
        </tbody>
 | 
						||
    </table>
 | 
						||
 | 
						||
    <p>
 | 
						||
        Go back to
 | 
						||
        <a href="javascript:void(0);" onclick="OOMAnalyser.OOMDisplayInstance.reset()" title="Run a new analysis">"Step 1 - Enter your OOM message"</a>
 | 
						||
        to run a new analysis.
 | 
						||
    </p>
 | 
						||
 | 
						||
    <h2>Footnotes</h2>
 | 
						||
    <ol>
 | 
						||
        <li id="footnote-proc5"><cite><a href="http://man7.org/linux/man-pages/man5/proc.5.html" target="_blank">
 | 
						||
	proc(5) - process information pseudo-filesystem</a></cite> (<a href="#" onclick="goBack()">Go Back</a>)
 | 
						||
        </li>
 | 
						||
    </ol>
 | 
						||
</div>
 | 
						||
 | 
						||
<h2>Further Information</h2>
 | 
						||
<ol>
 | 
						||
  <li>
 | 
						||
    <a href="https://man7.org/">Linux man pages online</a>
 | 
						||
  </li>
 | 
						||
  <li>
 | 
						||
    <a href="https://utcc.utoronto.ca/~cks/space/blog/linux/DecodingPageAllocFailures">
 | 
						||
      Decoding the Linux kernel's page allocation failure messages
 | 
						||
    </a>
 | 
						||
  </li>
 | 
						||
  <li>
 | 
						||
    <a href="http://elearningmedium.com/linux-kernel-oom-log-analysis/">Linux Kernel OOM Log Analysis</a>
 | 
						||
  </li>
 | 
						||
</ol>
 | 
						||
 | 
						||
<hr/>
 | 
						||
 | 
						||
<div class="footer">
 | 
						||
    OOMAnalyser <span id="version"></span> |
 | 
						||
    Copyright (C) 2017-2018 Carsten Grohmann |
 | 
						||
    <a href="javascript:void(0);" onclick="OOMAnalyser.toggle('license')" title="Show / hide license text">License: MIT</a> |
 | 
						||
    <a href="https://github.com/CarstenGrohmann/OOMAnalyser" title="Source code on GitHub">Source Code on GitHub</a>
 | 
						||
</div>
 | 
						||
 | 
						||
<div class="license" id="license">
 | 
						||
    <p>
 | 
						||
        Copyright (c) 2017-2018 Carsten Grohmann mail <add at here> carsten-grohmann.de
 | 
						||
    </p>
 | 
						||
    <p>
 | 
						||
        Permission is hereby granted, free of charge, to any person obtaining a copy of
 | 
						||
        this software and associated documentation files (the "Software"), to deal in
 | 
						||
        the Software without restriction, including without limitation the rights to
 | 
						||
        use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 | 
						||
        of the Software, and to permit persons to whom the Software is furnished to do
 | 
						||
        so, subject to the following conditions:
 | 
						||
    </p>
 | 
						||
    <p>
 | 
						||
        The above copyright notice and this permission notice shall be included in all
 | 
						||
        copies or substantial portions of the Software.
 | 
						||
    </p>
 | 
						||
    <p>
 | 
						||
        THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 | 
						||
        IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 | 
						||
        FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 | 
						||
        AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 | 
						||
        LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 | 
						||
        OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 | 
						||
        SOFTWARE.
 | 
						||
    </p>
 | 
						||
</div>
 | 
						||
 | 
						||
</body>
 | 
						||
</html>
 |