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<!DOCTYPE HTML>
<html lang="zh-Hans">
<head>
<meta charset="UTF-8">
<title>Don't Respond</title>
<meta name="viewport" content="width=device-width, initial-scale=1,user-scalable=no">
<meta name="author" content="Dou Jiang">
<meta property="og:type" content="website">
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<meta property="og:url" content="https://hjchen2.github.io/index.html">
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<meta property="og:locale">
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<meta name="twitter:card" content="summary">
<link rel="alternative" href="/atom.xml" title="Don't Respond" type="application/atom+xml">
<link rel="stylesheet" href="/css/style.css">
<meta name="generator" content="Hexo 6.3.0"></head>
<body>
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<div>
<div id="textlogo">
<h1 class="site-name"><a href="/" title="Don't Respond">Don't Respond</a></h1>
<h2 class="blog-motto"></h2>
</div>
<div class="navbar"><a class="navbutton navmobile" href="#" title="Menu">
</a></div>
<nav class="animated">
<ul>
<ul>
<li><a href="/">Home</a></li>
<li><a href="/archives">Archives</a></li>
<li><a href="/about">About</a></li>
<li>
<form class="search" action="//google.com/search" method="get" accept-charset="utf-8">
<label>Search</label>
<input type="search" id="search" name="q" autocomplete="off" maxlength="20" placeholder="Search" />
<input type="hidden" name="q" value="site:hjchen2.github.io">
</form>
</li>
</ul>
</nav>
</div>
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<div id="container">
<div id="main">
<article class="post-expand post" itemprop="articleBody">
<header class="article-info clearfix">
<h1 itemprop="name">
<a href="/2023/02/24/IREE编译流程6/" title="IREE编译流程解析(六)" itemprop="url">IREE编译流程解析(六)</a>
</h1>
<p class="article-author">By
<a href="/about" title="Dou Jiang" target="_blank" itemprop="author">Dou Jiang</a>
<p class="article-time">
<time datetime="2023-02-24T10:47:11.000Z" itemprop="datePublished"> Published 2023-02-24</time>
</p>
</header>
<div class="article-content">
<p>HAL::HALTransformPassPipeline的主要作用是进行tiling、vectorization和bufferization等操作，分配计算负载，最终生成target
device的代码。比如cuda target的dispatch source code会被递降为NVVM
IR。</p>
<p class="article-more-link">
<a href="/2023/02/24/IREE%E7%BC%96%E8%AF%91%E6%B5%81%E7%A8%8B6/#more">Read More</a>
</p>
</div>
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<div class="article-catetags">
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<span></span>
<a class="article-category-link" href="/categories/DL-Compiler/">DL Compiler</a>
</div>
<div class="article-tags">
<span></span> <a href="/tags/Deep-Learning-Compiler/">Deep Learning Compiler</a><a href="/tags/IREE/">IREE</a>
</div>
</div>
<div class="comments-count">
</div>
</footer>
</article>
<article class="post-expand post" itemprop="articleBody">
<header class="article-info clearfix">
<h1 itemprop="name">
<a href="/2023/02/13/IREE编译流程5/" title="IREE编译流程解析(五)" itemprop="url">IREE编译流程解析(五)</a>
</h1>
<p class="article-author">By
<a href="/about" title="Dou Jiang" target="_blank" itemprop="author">Dou Jiang</a>
<p class="article-time">
<time datetime="2023-02-13T13:57:20.000Z" itemprop="datePublished"> Published 2023-02-13</time>
</p>
</header>
<div class="article-content">
<p>IREE::Stream::StreamTransformPassPipeline
的主要作用是将program转换到stream
dialect，优化变量编码方式，划分调度子图，生成异步调度策略，并实现内存规划策略。</p>
<p class="article-more-link">
<a href="/2023/02/13/IREE%E7%BC%96%E8%AF%91%E6%B5%81%E7%A8%8B5/#more">Read More</a>
</p>
</div>
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<div class="article-catetags">
<div class="article-categories">
<span></span>
<a class="article-category-link" href="/categories/DL-Compiler/">DL Compiler</a>
</div>
<div class="article-tags">
<span></span> <a href="/tags/Deep-Learning-Compiler/">Deep Learning Compiler</a><a href="/tags/IREE/">IREE</a>
</div>
</div>
<div class="comments-count">
</div>
</footer>
</article>
<article class="post-expand post" itemprop="articleBody">
<header class="article-info clearfix">
<h1 itemprop="name">
<a href="/2023/01/04/IREE编译流程4/" title="IREE编译流程解析(四)" itemprop="url">IREE编译流程解析(四)</a>
</h1>
<p class="article-author">By
<a href="/about" title="Dou Jiang" target="_blank" itemprop="author">Dou Jiang</a>
<p class="article-time">
<time datetime="2023-01-04T13:15:20.000Z" itemprop="datePublished"> Published 2023-01-04</time>
</p>
</header>
<div class="article-content">
<p>IREE
Flow::buildFlowTransformPassPipeline主要作用是执行一系列窥孔优化，比如1x1的conv2d转换成matmul、tiling、op
fusion等，最终将workload拆分成<code>flow.executable</code>。相关的passes及其作用如下。</p>
<p class="article-more-link">
<a href="/2023/01/04/IREE%E7%BC%96%E8%AF%91%E6%B5%81%E7%A8%8B4/#more">Read More</a>
</p>
</div>
<footer class="article-footer clearfix">
<div class="article-catetags">
<div class="article-categories">
<span></span>
<a class="article-category-link" href="/categories/DL-Compiler/">DL Compiler</a>
</div>
<div class="article-tags">
<span></span> <a href="/tags/Deep-Learning-Compiler/">Deep Learning Compiler</a><a href="/tags/IREE/">IREE</a>
</div>
</div>
<div class="comments-count">
</div>
</footer>
</article>
<article class="post-expand post" itemprop="articleBody">
<header class="article-info clearfix">
<h1 itemprop="name">
<a href="/2023/01/04/IREE编译流程3/" title="IREE编译流程解析(三)" itemprop="url">IREE编译流程解析(三)</a>
</h1>
<p class="article-author">By
<a href="/about" title="Dou Jiang" target="_blank" itemprop="author">Dou Jiang</a>
<p class="article-time">
<time datetime="2023-01-04T12:30:12.000Z" itemprop="datePublished"> Published 2023-01-04</time>
</p>
</header>
<div class="article-content">
<p>IREE
ABI::TransformPassPipeline主要作用是将外部导入的接口和本module导出到外部的接口参数统一成标准标量类型或<code>hal.buffer_view</code>类型（<code>hal.buffer_view</code>对应tensor），包含以下几个passes。</p>
<p class="article-more-link">
<a href="/2023/01/04/IREE%E7%BC%96%E8%AF%91%E6%B5%81%E7%A8%8B3/#more">Read More</a>
</p>
</div>
<footer class="article-footer clearfix">
<div class="article-catetags">
<div class="article-categories">
<span></span>
<a class="article-category-link" href="/categories/DL-Compiler/">DL Compiler</a>
</div>
<div class="article-tags">
<span></span> <a href="/tags/Deep-Learning-Compiler/">Deep Learning Compiler</a><a href="/tags/IREE/">IREE</a>
</div>
</div>
<div class="comments-count">
</div>
</footer>
</article>
<article class="post-expand post" itemprop="articleBody">
<header class="article-info clearfix">
<h1 itemprop="name">
<a href="/2023/01/04/IREE编译流程2/" title="IREE编译流程解析(二)" itemprop="url">IREE编译流程解析(二)</a>
</h1>
<p class="article-author">By
<a href="/about" title="Dou Jiang" target="_blank" itemprop="author">Dou Jiang</a>
<p class="article-time">
<time datetime="2023-01-04T12:20:12.000Z" itemprop="datePublished"> Published 2023-01-04</time>
</p>
</header>
<div class="article-content">
<p>IREE CommonInputConversionPassPipeline主要作用是将IREE::Input dialect
lower成IREE::Util、IREE::Flow和IREE::HAL
dialect，包括以下几个passes。</p>
<p class="article-more-link">
<a href="/2023/01/04/IREE%E7%BC%96%E8%AF%91%E6%B5%81%E7%A8%8B2/#more">Read More</a>
</p>
</div>
<footer class="article-footer clearfix">
<div class="article-catetags">
<div class="article-categories">
<span></span>
<a class="article-category-link" href="/categories/DL-Compiler/">DL Compiler</a>
</div>
<div class="article-tags">
<span></span> <a href="/tags/Deep-Learning-Compiler/">Deep Learning Compiler</a><a href="/tags/IREE/">IREE</a>
</div>
</div>
<div class="comments-count">
</div>
</footer>
</article>
<article class="post-expand post" itemprop="articleBody">
<header class="article-info clearfix">
<h1 itemprop="name">
<a href="/2023/01/04/IREE编译流程1/" title="IREE编译流程解析(一)" itemprop="url">IREE编译流程解析(一)</a>
</h1>
<p class="article-author">By
<a href="/about" title="Dou Jiang" target="_blank" itemprop="author">Dou Jiang</a>
<p class="article-time">
<time datetime="2023-01-04T12:14:12.000Z" itemprop="datePublished"> Published 2023-01-04</time>
</p>
</header>
<div class="article-content">
<p>IREE
InputConversionPassPipeline的主要作用是将不同的输入（MHLO、XLA、Torch
Tensor和TOSA）统一lower成linalg dialect和builtin的arith dialect、scf
dialect和tensor
dialect。下面以MHLO输入为例，列举了InputConversionPassPipeline中各个pass以及它们的主要作用。</p>
<p class="article-more-link">
<a href="/2023/01/04/IREE%E7%BC%96%E8%AF%91%E6%B5%81%E7%A8%8B1/#more">Read More</a>
</p>
</div>
<footer class="article-footer clearfix">
<div class="article-catetags">
<div class="article-categories">
<span></span>
<a class="article-category-link" href="/categories/DL-Compiler/">DL Compiler</a>
</div>
<div class="article-tags">
<span></span> <a href="/tags/Deep-Learning-Compiler/">Deep Learning Compiler</a><a href="/tags/IREE/">IREE</a>
</div>
</div>
<div class="comments-count">
</div>
</footer>
</article>
<article class="post-expand post" itemprop="articleBody">
<header class="article-info clearfix">
<h1 itemprop="name">
<a href="/2023/01/04/IREE编译流程/" title="IREE编译流程解析" itemprop="url">IREE编译流程解析</a>
</h1>
<p class="article-author">By
<a href="/about" title="Dou Jiang" target="_blank" itemprop="author">Dou Jiang</a>
<p class="article-time">
<time datetime="2023-01-04T04:00:04.000Z" itemprop="datePublished"> Published 2023-01-04</time>
</p>
</header>
<div class="article-content">
<p>IREE目前支持将MHLO或XLA、Torch
Tensor和TOSA作为输入，经过一系列passes编译生成IREE定义的VM
bytecode中间产物，其中硬件相关代码会编译成相应的Executable，保存在VM
bytecode中供host进行调用，比如CUDA相关的计算代码会被lower成PTX代码，在IREE的runtime中再被CUDA的运行时以JIT的方式编译成可执行的cubin
kernel。</p>
<p class="article-more-link">
<a href="/2023/01/04/IREE%E7%BC%96%E8%AF%91%E6%B5%81%E7%A8%8B/#more">Read More</a>
</p>
</div>
<footer class="article-footer clearfix">
<div class="article-catetags">
<div class="article-categories">
<span></span>
<a class="article-category-link" href="/categories/DL-Compiler/">DL Compiler</a>
</div>
<div class="article-tags">
<span></span> <a href="/tags/Deep-Learning-Compiler/">Deep Learning Compiler</a><a href="/tags/IREE/">IREE</a>
</div>
</div>
<div class="comments-count">
</div>
</footer>
</article>
<article class="post-expand post" itemprop="articleBody">
<header class="article-info clearfix">
<h1 itemprop="name">
<a href="/2020/02/25/如何在XRT框架下添加自定义的后端引擎/" title="如何在XRT框架下添加自定义的后端引擎" itemprop="url">如何在XRT框架下添加自定义的后端引擎</a>
</h1>
<p class="article-author">By
<a href="/about" title="Dou Jiang" target="_blank" itemprop="author">Dou Jiang</a>
<p class="article-time">
<time datetime="2020-02-25T08:06:18.000Z" itemprop="datePublished"> Published 2020-02-25</time>
</p>
</header>
<div class="article-content">
<p>XRT为不同的后端引擎提供了统一的上层功能和接口抽象，这些功能和接口包括：</p>
<ul>
<li>统一的DAG计算图表示</li>
<li>统一的子图表达、切分和折叠过程</li>
<li>统一的JIT子图编译接口和缓存机制</li>
<li>统一的Executable Launch接口</li>
</ul>
<p>得益于上层统一的抽象和模块化的设计，后端引擎只需要处理一些差异化的接口，并且这些差异化通常只体现在子图的编译和executable
launch接口的具体实现上。</p>
<p class="article-more-link">
<a href="/2020/02/25/%E5%A6%82%E4%BD%95%E5%9C%A8XRT%E6%A1%86%E6%9E%B6%E4%B8%8B%E6%B7%BB%E5%8A%A0%E8%87%AA%E5%AE%9A%E4%B9%89%E7%9A%84%E5%90%8E%E7%AB%AF%E5%BC%95%E6%93%8E/#more">Read More</a>
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<span></span> <a href="/tags/XRT/">XRT</a><a href="/tags/Compiler/">Compiler</a><a href="/tags/TensorFlow-XLA/">TensorFlow XLA</a><a href="/tags/TensorRT/">TensorRT</a>
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<a href="/2020/01/10/TVM-PackedFunc实现机制/" title="TVM PackedFunc实现机制" itemprop="url">TVM PackedFunc实现机制</a>
</h1>
<p class="article-author">By
<a href="/about" title="Dou Jiang" target="_blank" itemprop="author">Dou Jiang</a>
<p class="article-time">
<time datetime="2020-01-10T04:24:08.000Z" itemprop="datePublished"> Published 2020-01-10</time>
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<h2 id="tvm-packedfunc实现">TVM PackedFunc实现</h2>
<p>为了便于Python和C++混合编程，TVM使用了统一的PackedFunc机制。PackedFunc可以将C++中的各类函数打包成统一的函数接口，并自动导出到Python模块中进行调用，并且也支持从Python中注册一个函数，并伪装成PackedFunc在C++和Python中调用。</p>
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<a href="/2020/01/10/TVM-PackedFunc%E5%AE%9E%E7%8E%B0%E6%9C%BA%E5%88%B6/#more">Read More</a>
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<span></span> <a href="/tags/TVM/">TVM</a><a href="/tags/PackedFunc/">PackedFunc</a>
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<a href="/2019/12/26/图替换/" title="图替换" itemprop="url">图替换</a>
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<p class="article-author">By
<a href="/about" title="Dou Jiang" target="_blank" itemprop="author">Dou Jiang</a>
<p class="article-time">
<time datetime="2019-12-26T05:54:04.000Z" itemprop="datePublished"> Published 2019-12-26</time>
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<h3 id="背景">背景</h3>
<p>图替换（或者叫图改写）是一种重要的图优化技术，几乎在所有的开源框架（尤其是移动端框架）中都有应用。比如tensorflow
r1.14版本中就包含了155个替换子，而且实现这些替换子的总代码量接近53k行。</p>
<blockquote>
<p>一些常见的图优化技术：</p>
<ul>
<li><p>DCE</p></li>
<li><p>CSE（公共子表达式消除）</p></li>
<li><p>常量折叠</p></li>
<li><p>数学公式简化</p></li>
<li><p>Op融合</p></li>
<li><p>Layout变换</p></li>
<li><p>内存优化（swap-in/swap-out、重计算）</p></li>
</ul>
</blockquote>
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<span></span> <a href="/tags/图替换/">图替换</a><a href="/tags/超优化/">超优化</a><a href="/tags/graph-optimization/">graph optimization</a><a href="/tags/super-optimization/">super optimization</a><a href="/tags/substitution/">substitution</a>
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