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<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Eric X. Liu's Personal Page</title><link>/</link><description>Recent content on Eric X. Liu's Personal Page</description><generator>Hugo</generator><language>en</language><lastBuildDate>Wed, 20 Aug 2025 04:16:22 +0000</lastBuildDate><atom:link href="/index.xml" rel="self" type="application/rss+xml"/><item><title>A Comprehensive Guide to Breville Barista Pro Maintenance</title><link>/posts/a-comprehensive-guide-to-breville-barista-pro-maintenance/</link><pubDate>Wed, 20 Aug 2025 04:16:13 +0000</pubDate><guid>/posts/a-comprehensive-guide-to-breville-barista-pro-maintenance/</guid><description><p>Proper maintenance is critical for the longevity and performance of a Breville Barista Pro espresso machine. Consistent cleaning not only ensures the machine functions correctly but also directly impacts the quality of the espresso produced. This guide provides a detailed, technical breakdown of the essential maintenance routines, from automated cycles to daily upkeep.</p>
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<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Eric X. Liu's Personal Page</title><link>/</link><description>Recent content on Eric X. Liu's Personal Page</description><generator>Hugo</generator><language>en</language><lastBuildDate>Wed, 20 Aug 2025 04:32:59 +0000</lastBuildDate><atom:link href="/index.xml" rel="self" type="application/rss+xml"/><item><title>A Comprehensive Guide to Breville Barista Pro Maintenance</title><link>/posts/a-comprehensive-guide-to-breville-barista-pro-maintenance/</link><pubDate>Wed, 20 Aug 2025 04:32:52 +0000</pubDate><guid>/posts/a-comprehensive-guide-to-breville-barista-pro-maintenance/</guid><description><p>Proper maintenance is critical for the longevity and performance of a Breville Barista Pro espresso machine. Consistent cleaning not only ensures the machine functions correctly but also directly impacts the quality of the espresso produced. This guide provides a detailed, technical breakdown of the essential maintenance routines, from automated cycles to daily upkeep.</p>
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<h4 id="understanding-the-two-primary-maintenance-cycles">
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<strong>Understanding the Two Primary Maintenance Cycles</strong>
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<a class="heading-link" href="#understanding-the-two-primary-maintenance-cycles">
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@@ -6,7 +6,15 @@
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<span class="sr-only">Link to heading</span>
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</a>
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</h4>
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<p>The Breville Barista Pro has two distinct, automated maintenance procedures: the <strong>Cleaning (Flush) Cycle</strong> and the <strong>Descale Cycle</strong>. It is important to understand that these are not interchangeable, as they address different types of buildup within the machine.</p></description></item><item><title>Fixing GPU Operator Pods Stuck in Init: Secure Boot, DKMS, and MOK on Proxmox + Debian</title><link>/posts/secure-boot-dkms-and-mok-on-proxmox-debian/</link><pubDate>Sat, 09 Aug 2025 00:00:00 +0000</pubDate><guid>/posts/secure-boot-dkms-and-mok-on-proxmox-debian/</guid><description><p>I hit an issue where all GPU Operator pods on one node were stuck in Init after migrating from Legacy BIOS to UEFI. The common error was NVIDIA components waiting for “toolkit-ready,” while the toolkit init container looped with:</p>
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<p>The Breville Barista Pro has two distinct, automated maintenance procedures: the <strong>Cleaning (Flush) Cycle</strong> and the <strong>Descale Cycle</strong>. It is important to understand that these are not interchangeable, as they address different types of buildup within the machine.</p></description></item><item><title>A Technical Deep Dive into the Transformer's Core Mechanics</title><link>/posts/a-technical-deep-dive-into-the-transformer-s-core-mechanics/</link><pubDate>Wed, 20 Aug 2025 04:32:52 +0000</pubDate><guid>/posts/a-technical-deep-dive-into-the-transformer-s-core-mechanics/</guid><description><p>The Transformer architecture is the bedrock of modern Large Language Models (LLMs). While its high-level success is widely known, a deeper understanding requires dissecting its core components. This article provides a detailed, technical breakdown of the fundamental concepts within a Transformer block, from the notion of &ldquo;channels&rdquo; to the intricate workings of the attention mechanism and its relationship with other advanced architectures like Mixture of Experts.</p>
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<h3 id="1-the-channel-a-foundational-view-of-d_model">
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1. The &ldquo;Channel&rdquo;: A Foundational View of <code>d_model</code>
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<a class="heading-link" href="#1-the-channel-a-foundational-view-of-d_model">
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<i class="fa-solid fa-link" aria-hidden="true" title="Link to heading"></i>
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<span class="sr-only">Link to heading</span>
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</a>
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</h3>
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<p>In deep learning, a &ldquo;channel&rdquo; can be thought of as a feature dimension. While this term is common in Convolutional Neural Networks for images (e.g., Red, Green, Blue channels), in LLMs, the analogous concept is the model&rsquo;s primary embedding dimension, commonly referred to as <code>d_model</code>.</p></description></item><item><title>Fixing GPU Operator Pods Stuck in Init: Secure Boot, DKMS, and MOK on Proxmox + Debian</title><link>/posts/secure-boot-dkms-and-mok-on-proxmox-debian/</link><pubDate>Sat, 09 Aug 2025 00:00:00 +0000</pubDate><guid>/posts/secure-boot-dkms-and-mok-on-proxmox-debian/</guid><description><p>I hit an issue where all GPU Operator pods on one node were stuck in Init after migrating from Legacy BIOS to UEFI. The common error was NVIDIA components waiting for “toolkit-ready,” while the toolkit init container looped with:</p>
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<ul>
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<li>nvidia-smi failed to communicate with the NVIDIA driver</li>
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<li>modprobe nvidia → “Key was rejected by service”</li>
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