_site/environment/index.html - public/gem5-website - Git at Google

 <!DOCTYPE html>
 <html>
 <head>
 	<meta charset="utf-8">
 	<meta http-equiv="x-ua-compatible" content="ie=edge">
 	<meta name="viewport" content="width=device-width, initial-scale=1">

 	<title>gem5</title>

 	<!-- SITE FAVICON -->
 	<link rel="shortcut icon" type="image/gif" href="/assets/img/gem5ColorVert.gif"/>

 	<link rel="canonical" href="http://localhost:4000/environment/">
 	<link href='https://fonts.googleapis.com/css?family=Open+Sans:400,300,700,800,600' rel='stylesheet' type='text/css'>
 	<link href='https://fonts.googleapis.com/css?family=Muli:400,300' rel='stylesheet' type='text/css'>

 	<!-- FAVICON -->
 	<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css">

 	<!-- BOOTSTRAP -->
 	<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">

 	<!-- CUSTOM CSS -->
 	<link rel="stylesheet" href="/css/main.css">
 </head>


 <body>
 	<nav class="navbar navbar-expand-md navbar-light bg-light">
   <a class="navbar-brand" href="/">
 		<img src="/assets/img/gem5ColorLong.gif" alt="gem5" height=45px>
 	</a>
   <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNavDropdown" aria-controls="navbarNavDropdown" aria-expanded="false" aria-label="Toggle navigation">
     <span class="navbar-toggler-icon"></span>
   </button>
   <div class="collapse navbar-collapse" id="navbarNavDropdown">
     <ul class="navbar-nav ml-auto">
       <li class="nav-item ">
         <a class="nav-link" href="/">Home</a>
       </li>

 			<li class="nav-item dropdown ">
 				<a class="nav-link dropdown-toggle" href="/about" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
 					About
 				</a>
 				<div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
           <a class="dropdown-item" href="/about">About</a>
           <a class="dropdown-item" href="/publications">Publications</a>
           <a class="dropdown-item" href="/governance">Governance</a>
 				</div>
 			</li>

 			<li class="nav-item dropdown active">
 				<a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
 					Documentation
 				</a>
 				<div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
 					<!-- Pull navigation from _data/documentation.yml -->

             <a class="dropdown-item" href="/introduction">Introduction</a>

             <a class="dropdown-item" href="/building">Getting Started</a>

             <a class="dropdown-item" href="/environment">Modifying/Extending</a>

             <a class="dropdown-item" href="/MSIintro">Modeling Cache Coherence with Ruby</a>

 				</div>
 			</li>

       <li class="nav-item ">
         <a class="nav-link" href="/contributing">Contributing</a>
       </li>

 			<li class="nav-item ">
         <a class="nav-link" href="/search">Search</a>
       </li>
     </ul>
   </div>
 </nav>

 	<main>
 		<div class="sidenav-top">
   <img src="/assets/img/gem5ColorLong.gif" height="80">
   <div class="search">
     <form action="/search" method="get">
       <!-- <label for="search-box"><i class="fa fa-search"></i></label> -->
       <input type="text" name="query">
       <button type="submit" name="submit"><i class="fa fa-search"></i></button>
     </form>
   </div>
 </div>
 <div class="sidenav">
   <!-- Pull navigation from _data/documentation.yml -->

     <a class="item" href="/introduction" role="button" aria-expanded="false" aria-controls="collapseExample">
       Introduction
     </a>
     <div class="collapse " id="introdution">

     </div>

     <a class="item" data-toggle="collapse" href="#pt1" role="button" aria-expanded="false" aria-controls="collapseExample">
       Getting Started
     </a>
     <div class="collapse " id="pt1">

         <a class="subitem " href="/building">Building gem5</a>

         <a class="subitem " href="/simple_config">Creating a simple configuration script</a>

         <a class="subitem " href="/cache_config">Adding cache to configuration script</a>

         <a class="subitem " href="/gem5_stats">Understanding gem5 statistics and output</a>

         <a class="subitem " href="/example_configs">Using the default configuration scripts</a>

     </div>

     <a class="item" data-toggle="collapse" href="#pt2" role="button" aria-expanded="false" aria-controls="collapseExample">
       Modifying/Extending
     </a>
     <div class="collapse show" id="pt2">

         <a class="subitem active" href="/environment">Setting up your development environment</a>

         <a class="subitem " href="/helloobject">Creating a very simple SimObject</a>

         <a class="subitem " href="/debugging">Debugging gem5</a>

         <a class="subitem " href="/events">Event-driven programming</a>

         <a class="subitem " href="/parameters">Adding parameters to SimObjects and more events</a>

         <a class="subitem " href="/memoryobject">Creating SimObjects in the memory system</a>

         <a class="subitem " href="/simplecache">Creating a simple cache object</a>

     </div>

     <a class="item" data-toggle="collapse" href="#pt3" role="button" aria-expanded="false" aria-controls="collapseExample">
       Modeling Cache Coherence with Ruby
     </a>
     <div class="collapse " id="pt3">

         <a class="subitem " href="/MSIintro">Introduction to Ruby</a>

         <a class="subitem " href="/cache-intro">MSI example cache protocol</a>

         <a class="subitem " href="/cache-declarations">Declaring a state machine</a>

         <a class="subitem " href="/cache-in-ports">In port code blocks</a>

         <a class="subitem " href="/cache-actions">Action code blocks</a>

         <a class="subitem " href="/cache-transitions">Transition code blocks</a>

         <a class="subitem " href="/directory">MSI Directory implementation</a>

         <a class="subitem " href="/MSIbuilding">Compiling a SLICC protocol</a>

         <a class="subitem " href="/configuration">Configuring a simple Ruby system</a>

         <a class="subitem " href="/running">Running the simple Ruby system</a>

         <a class="subitem " href="/MSIdebugging">Debugging SLICC Protocols</a>

         <a class="subitem " href="/simple-MI_example">Configuring for a standard protocol</a>

     </div>

 </div>

 <div class="container" id="doc-container">

   <!-- <h1>Setting up your development environment</h1> -->
   <dl>
   <dt>authors</dt>
   <dd>Jason Lowe-Power</dd>
 </dl>

 <h1 id="setting-up-your-development-environment">Setting up your development environment</h1>

 <p>This is going to talk about getting started developing gem5.</p>

 <h2 id="gem5-style-guidelines">gem5-style guidelines</h2>

 <p>When modifying any open source project, it is important to follow the
 project’s style guidelines. Details on gem5 style can be found on the
 gem5 <a href="http://gem5.org/Coding_Style">wiki page</a>.</p>

 <p>To help you conform to the style guidelines, gem5 includes a script
 which runs whenever you commit a changeset in git. This script should be
 automatically added to your .git/config file by SCons the first time you
 build gem5. Please do not ignore these warnings/errors. However, in the
 rare case where you are trying to commit a file that doesn’t conform to
 the gem5 style guidelines (e.g., something from outside the gem5 source
 tree) you can use the git option <code class="highlighter-rouge">--no-verify</code> to skip running the style
 checker.</p>

 <p>The key takeaways from the style guide are:</p>

 <ul>
   <li>Use 4 spaces, not tabs</li>
   <li>Sort the includes</li>
   <li>Use capitalized camel case for class names, camel case for member
 variables, and underscores for local variables.</li>
   <li>Document your code</li>
 </ul>

 <h2 id="git-branches">git branches</h2>

 <p>Most people developing with gem5 use the branch feature of git to track
 their changes. This makes it quite simple to commit your changes back to
 gem5. Additionally, using branches can make it easier to update gem5
 with new changes that other people make while keeping your own changes
 separate. The <a href="https://git-scm.com/book/en/v2">Git book</a> has a great
 <a href="https://git-scm.com/book/en/v2/Git-Branching-Branches-in-a-Nutshell">chapter</a>
 describing the details of how to use branches.</p>


 </div>

 	</main>

 	<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
 	<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin="anonymous"></script>
 	<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>

 	<script>
 	  // When the user scrolls down 20px from the top of the document, show the button
 	  window.onscroll = function() {scrollFunction()};

 	  function scrollFunction() {
 	      if (document.body.scrollTop > 100 || document.documentElement.scrollTop > 20) {
 	          document.getElementById("myBtn").style.display = "block";
 	      } else {
 	          document.getElementById("myBtn").style.display = "none";
 	      }
 	  }

 	  // When the user clicks on the button, scroll to the top of the document
 	  function topFunction() {
 	      document.body.scrollTop = 0;
 	      document.documentElement.scrollTop = 0;
 	  }
 	</script>

 </body>

 <footer class="page-footer">
 	<div class="container">
 		<div class="row">

 			<div class="col-12 col-sm-4">
 				<p><a href="/about">About</a></p>
 				<p><a href="/publications">Publications</a></p>
 				<p><a href="/contributing">Contributing</a></p>
 			</div><br>

 			<div class="col-12 col-sm-4">
 				<p><a href="/gettingstarted">Documentation</a></p>
 				<p><a href="#">Source</a></p>
 			</div><br>

 			<div class="col-12 col-sm-4">
 				<p><a href="/help">Help</a></p>
 				<p><a href="/search">Search</a></p>
 				<p><a href="#">Mailing Lists</a></p>
 			</div>

 		</div>
 	</div>
 </footer>


 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<meta http-equiv="x-ua-compatible" content="ie=edge">
	<meta name="viewport" content="width=device-width, initial-scale=1">

	<title>gem5</title>

	<!-- SITE FAVICON -->
	<link rel="shortcut icon" type="image/gif" href="/assets/img/gem5ColorVert.gif"/>

	<link rel="canonical" href="http://localhost:4000/environment/">
	<link href='https://fonts.googleapis.com/css?family=Open+Sans:400,300,700,800,600' rel='stylesheet' type='text/css'>
	<link href='https://fonts.googleapis.com/css?family=Muli:400,300' rel='stylesheet' type='text/css'>

	<!-- FAVICON -->
	<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css">

	<!-- BOOTSTRAP -->
	<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">

	<!-- CUSTOM CSS -->
	<link rel="stylesheet" href="/css/main.css">
	</head>


	<body>
	<nav class="navbar navbar-expand-md navbar-light bg-light">
	<a class="navbar-brand" href="/">
	<img src="/assets/img/gem5ColorLong.gif" alt="gem5" height=45px>
	</a>
	<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNavDropdown" aria-controls="navbarNavDropdown" aria-expanded="false" aria-label="Toggle navigation">
	<span class="navbar-toggler-icon"></span>
	</button>
	<div class="collapse navbar-collapse" id="navbarNavDropdown">
	<ul class="navbar-nav ml-auto">
	<li class="nav-item ">
	<a class="nav-link" href="/">Home</a>
	</li>

	<li class="nav-item dropdown ">
	<a class="nav-link dropdown-toggle" href="/about" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
	About
	</a>
	<div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
	<a class="dropdown-item" href="/about">About</a>
	<a class="dropdown-item" href="/publications">Publications</a>
	<a class="dropdown-item" href="/governance">Governance</a>
	</div>
	</li>

	<li class="nav-item dropdown active">
	<a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
	Documentation
	</a>
	<div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
	<!-- Pull navigation from _data/documentation.yml -->

	<a class="dropdown-item" href="/introduction">Introduction</a>

	<a class="dropdown-item" href="/building">Getting Started</a>

	<a class="dropdown-item" href="/environment">Modifying/Extending</a>

	<a class="dropdown-item" href="/MSIintro">Modeling Cache Coherence with Ruby</a>

	</div>
	</li>

	<li class="nav-item ">
	<a class="nav-link" href="/contributing">Contributing</a>
	</li>

	<li class="nav-item ">
	<a class="nav-link" href="/search">Search</a>
	</li>
	</ul>
	</div>
	</nav>

	<main>
	<div class="sidenav-top">
	<img src="/assets/img/gem5ColorLong.gif" height="80">
	<div class="search">
	<form action="/search" method="get">
	<!-- <label for="search-box"><i class="fa fa-search"></i></label> -->
	<input type="text" name="query">
	<button type="submit" name="submit"><i class="fa fa-search"></i></button>
	</form>
	</div>
	</div>
	<div class="sidenav">
	<!-- Pull navigation from _data/documentation.yml -->

	<a class="item" href="/introduction" role="button" aria-expanded="false" aria-controls="collapseExample">
	Introduction
	</a>
	<div class="collapse " id="introdution">

	</div>

	<a class="item" data-toggle="collapse" href="#pt1" role="button" aria-expanded="false" aria-controls="collapseExample">
	Getting Started
	</a>
	<div class="collapse " id="pt1">

	<a class="subitem " href="/building">Building gem5</a>

	<a class="subitem " href="/simple_config">Creating a simple configuration script</a>

	<a class="subitem " href="/cache_config">Adding cache to configuration script</a>

	<a class="subitem " href="/gem5_stats">Understanding gem5 statistics and output</a>

	<a class="subitem " href="/example_configs">Using the default configuration scripts</a>

	</div>

	<a class="item" data-toggle="collapse" href="#pt2" role="button" aria-expanded="false" aria-controls="collapseExample">
	Modifying/Extending
	</a>
	<div class="collapse show" id="pt2">

	<a class="subitem active" href="/environment">Setting up your development environment</a>

	<a class="subitem " href="/helloobject">Creating a very simple SimObject</a>

	<a class="subitem " href="/debugging">Debugging gem5</a>

	<a class="subitem " href="/events">Event-driven programming</a>

	<a class="subitem " href="/parameters">Adding parameters to SimObjects and more events</a>

	<a class="subitem " href="/memoryobject">Creating SimObjects in the memory system</a>

	<a class="subitem " href="/simplecache">Creating a simple cache object</a>

	</div>

	<a class="item" data-toggle="collapse" href="#pt3" role="button" aria-expanded="false" aria-controls="collapseExample">
	Modeling Cache Coherence with Ruby
	</a>
	<div class="collapse " id="pt3">

	<a class="subitem " href="/MSIintro">Introduction to Ruby</a>

	<a class="subitem " href="/cache-intro">MSI example cache protocol</a>

	<a class="subitem " href="/cache-declarations">Declaring a state machine</a>

	<a class="subitem " href="/cache-in-ports">In port code blocks</a>

	<a class="subitem " href="/cache-actions">Action code blocks</a>

	<a class="subitem " href="/cache-transitions">Transition code blocks</a>

	<a class="subitem " href="/directory">MSI Directory implementation</a>

	<a class="subitem " href="/MSIbuilding">Compiling a SLICC protocol</a>

	<a class="subitem " href="/configuration">Configuring a simple Ruby system</a>

	<a class="subitem " href="/running">Running the simple Ruby system</a>

	<a class="subitem " href="/MSIdebugging">Debugging SLICC Protocols</a>

	<a class="subitem " href="/simple-MI_example">Configuring for a standard protocol</a>

	</div>

	</div>

	<div class="container" id="doc-container">

	<!-- <h1>Setting up your development environment</h1> -->
	<dl>
	<dt>authors</dt>
	<dd>Jason Lowe-Power</dd>
	</dl>

	<h1 id="setting-up-your-development-environment">Setting up your development environment</h1>

	<p>This is going to talk about getting started developing gem5.</p>

	<h2 id="gem5-style-guidelines">gem5-style guidelines</h2>

	<p>When modifying any open source project, it is important to follow the
	project’s style guidelines. Details on gem5 style can be found on the
	gem5 <a href="http://gem5.org/Coding_Style">wiki page</a>.</p>

	<p>To help you conform to the style guidelines, gem5 includes a script
	which runs whenever you commit a changeset in git. This script should be
	automatically added to your .git/config file by SCons the first time you
	build gem5. Please do not ignore these warnings/errors. However, in the
	rare case where you are trying to commit a file that doesn’t conform to
	the gem5 style guidelines (e.g., something from outside the gem5 source
	tree) you can use the git option <code class="highlighter-rouge">--no-verify</code> to skip running the style
	checker.</p>

	<p>The key takeaways from the style guide are:</p>

	<ul>
	<li>Use 4 spaces, not tabs</li>
	<li>Sort the includes</li>
	<li>Use capitalized camel case for class names, camel case for member
	variables, and underscores for local variables.</li>
	<li>Document your code</li>
	</ul>

	<h2 id="git-branches">git branches</h2>

	<p>Most people developing with gem5 use the branch feature of git to track
	their changes. This makes it quite simple to commit your changes back to
	gem5. Additionally, using branches can make it easier to update gem5
	with new changes that other people make while keeping your own changes
	separate. The <a href="https://git-scm.com/book/en/v2">Git book</a> has a great
	<a href="https://git-scm.com/book/en/v2/Git-Branching-Branches-in-a-Nutshell">chapter</a>
	describing the details of how to use branches.</p>


	</div>

	</main>

	<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin="anonymous"></script>
	<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>

	<script>
	// When the user scrolls down 20px from the top of the document, show the button
	window.onscroll = function() {scrollFunction()};

	function scrollFunction() {
	if (document.body.scrollTop > 100 \|\| document.documentElement.scrollTop > 20) {
	document.getElementById("myBtn").style.display = "block";
	} else {
	document.getElementById("myBtn").style.display = "none";
	}
	}

	// When the user clicks on the button, scroll to the top of the document
	function topFunction() {
	document.body.scrollTop = 0;
	document.documentElement.scrollTop = 0;
	}
	</script>

	</body>

	<footer class="page-footer">
	<div class="container">
	<div class="row">

	<div class="col-12 col-sm-4">
	<p><a href="/about">About</a></p>
	<p><a href="/publications">Publications</a></p>
	<p><a href="/contributing">Contributing</a></p>
	</div><br>

	<div class="col-12 col-sm-4">
	<p><a href="/gettingstarted">Documentation</a></p>
	<p><a href="#">Source</a></p>
	</div><br>

	<div class="col-12 col-sm-4">
	<p><a href="/help">Help</a></p>
	<p><a href="/search">Search</a></p>
	<p><a href="#">Mailing Lists</a></p>
	</div>

	</div>
	</div>
	</footer>


	</html>