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614 lines
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HTML
614 lines
14 KiB
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</head>
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<body>
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<a href="#skip" class="visually-hidden">Skip to main content</a>
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<header>
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<a href="/" class="home-link">Chris Kaczor</a>
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Home
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About
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</header>
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<main id="skip">
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<heading-anchors>
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<h1 id="cpu-usage-status-window">CPU Usage Status Window</h1>
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<ul class="post-metadata">
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<li>
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||
<time datetime="2018-03-08">08 March 2018</time>
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||
</li>
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||
<li>
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||
<a href="/tags/code/" class="post-tag">Code</a>,
|
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</li>
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<li>
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<a href="/tags/floating-status-window/" class="post-tag">Floating Status Window</a>
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</li>
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||
</ul>
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<p>Now that I've written about my <a href="https://github.com/ckaczor/FloatingStatusWindow">FloatingStatusWindow</a> library I can start to talk about the projects that use it. First up is the <a href="https://github.com/ckaczor/ProcessCpuUsageStatusWindow">ProcessCpuUsageStatusWindow</a> project.</p>
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<p><a href="/blog/cpu-usage-status-window/images/ProcessCpuUsageStatusWindow.png"><picture><source type="image/avif" srcset="/img/L-UgyKZ-NI-373.avif 373w"><source type="image/webp" srcset="/img/L-UgyKZ-NI-373.webp 373w"><img loading="lazy" decoding="async" src="/img/L-UgyKZ-NI-373.png" alt="" width="373" height="139"></picture></a></p>
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||
<p>It is basically a mini task manager showing the top X processes by CPU usage and the total CPU usage of the system. The values update automatically every 2 seconds.</p>
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||
<p>CPU usage is calculated by taking a snapshot of "% processor time" for the "Process" performance counter category every 2 seconds and having the counter sample calculate the percent usage for each process based on the previous snapshot.</p>
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<p>This ended needing a lot more calculation than I had hoped although I don't remember all the details as to why - one of the perils of blogging so long after the code was written. From what I remember what I first tried was built into .NET and was easier to code but used a lot more processor time than I was comfortable with. Perhaps that has since been fixed in a later framework version - someday I'll have to try to recreate what I was doing.</p>
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<p>One caveat - the code doesn't always work quite right. I have seen a few times where the calculation comes out way over 100% but I haven't been able to reliably reproduce it. It seems to be when either something hangs Windows or there's exceptionally high disk usage. Either way - it works well enough for getting a quick look at CPU usage so I haven't spent much time on it.</p>
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<p>This was also the first project where I tried using <a href="https://github.com/Squirrel/Squirrel.Windows">Squirrel</a> for installation and updates. I had used both <a href="http://wixtoolset.org/">WiX</a> (with custom update detection and installation) and <a href="https://en.wikipedia.org/wiki/ClickOnce">ClickOnce</a> in other projects and I think I'll probably go with Squirrel for most things going forward.</p>
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