MVT/application_memory.html at main · rdkcentral/MVT · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Hyperlink Buttons</title>
    <link rel="stylesheet" href="custompagestyle.css"  type="text/css"/>
    <style>
        .positioned-textbox {
            position: absolute;
            top: 100px;
            left: 20px;
            width: 180px;
            padding: 10px;
        }
        .read-only-textarea {
            position: absolute;
            top: 250px;
            left: 20px;
            background-color: #cecbcb;
            border: 1px solid #ccc;
            padding: 5px;
            width: 1150px;
            height: 170px;
            resize: none;
        }
    </style>
</head>
<body>
    <h1>Application memory test</h1>

    <div class="container">
        <input type="text" class="positioned-textbox" value="0" id="textbox" readonly>
    </div>

    <p></p>
    <p></p>

    <button type="button" class="nav-button" id="button" onclick="tiggerfunction()">
        Fill Memory in MB
    </button>

    <!-- Go Back Link -->
    <a href="#" onclick="history.back(); return false;" class="back-link" tabindex="0" id="backLink">
        ← Go Back to Previous Page
    </a>

    <textarea class="read-only-textarea" readonly>
Points to note:

* This page is for testing application memory threshold.
* For each button press, 25 MB of memory is allocated in container.
* Amount of total application memory allocated in the container can be checked by using following command in CPE SSH for each button press:
    cat /sys/fs/cgroup/memory/lxc.slice/wpe-thunder@9.service/memory.max_usage_in_bytes
* When memory allocation exceeds 575 MB threshold of container, application will crash, exits from MVT and CS2400 notification is displayed.
* Please note that if navigated back to MVT page in between this test, ensure to exit from all Browser based apps and re-launch this test freshly.
    </textarea>

    <script>

        window.onload = function() {
            document.getElementById('button').focus();
        };
        document.body.style.backgroundColor = "#FFFFFF";

        globalThis.permanentStorage = globalThis.permanentStorage || [];
        var totalMem = 25;
        var blockSize = 25;

        function allocateMemory() {
            const bytes = blockSize * 1024 * 1024;
            const buffer = new Uint8Array(bytes);
            buffer.fill(Math.random());
            console.log("TotalMem allocated in MB : ", totalMem);
            const inputElement = document.getElementById('textbox');
            inputElement.value = totalMem;
            totalMem = totalMem + blockSize;
            return buffer;
        }

        function tiggerfunction() {
            globalThis.permanentStorage.push(allocateMemory());
        }

       // Keyboard navigation functionalities
        document.addEventListener('keydown', function(e) {
            const focusedElement = document.activeElement;
            let nextElement = null;

            if (e.key === 'ArrowDown' || e.key === 'ArrowUp') {
                e.preventDefault();
            }

            if (e.key === 'ArrowDown') {
                if (focusedElement.id === 'button') {
                    nextElement = document.getElementById('backLink');
                } else if (focusedElement.id === 'backLink') {
                    nextElement = document.getElementById('button');
                }
            } else if (e.key === 'ArrowUp') {
                if (focusedElement.id === 'button') {
                    nextElement = document.getElementById('backLink');
                } else if (focusedElement.id === 'backLink') {
                    nextElement = document.getElementById('button');
                }
            }

            if (nextElement) {
                nextElement.focus();
            }
        });
    </script>

</body>
</html>