67 lines
2.8 KiB
HTML
67 lines
2.8 KiB
HTML
|
<html lang="en">
|
||
|
|
<head>
|
||
|
|
<title>i386-LWP - Using as</title>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html">
|
||
|
|
<meta name="description" content="Using as">
|
||
|
|
<meta name="generator" content="makeinfo 4.13">
|
||
|
|
<link title="Top" rel="start" href="index.html#Top">
|
||
|
|
<link rel="up" href="i386_002dDependent.html#i386_002dDependent" title="i386-Dependent">
|
||
|
|
<link rel="prev" href="i386_002dSIMD.html#i386_002dSIMD" title="i386-SIMD">
|
||
|
|
<link rel="next" href="i386_002dBMI.html#i386_002dBMI" title="i386-BMI">
|
||
|
|
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
||
|
|
<!--
|
||
|
|
This file documents the GNU Assembler "as".
|
||
|
|
|
||
|
|
Copyright (C) 1991-2019 Free Software Foundation, Inc.
|
||
|
|
|
||
|
|
Permission is granted to copy, distribute and/or modify this document
|
||
|
|
under the terms of the GNU Free Documentation License, Version 1.3
|
||
|
|
or any later version published by the Free Software Foundation;
|
||
|
|
with no Invariant Sections, with no Front-Cover Texts, and with no
|
||
|
|
Back-Cover Texts. A copy of the license is included in the
|
||
|
|
section entitled ``GNU Free Documentation License''.
|
||
|
|
|
||
|
|
-->
|
||
|
|
<meta http-equiv="Content-Style-Type" content="text/css">
|
||
|
|
<style type="text/css"><!--
|
||
|
|
pre.display { font-family:inherit }
|
||
|
|
pre.format { font-family:inherit }
|
||
|
|
pre.smalldisplay { font-family:inherit; font-size:smaller }
|
||
|
|
pre.smallformat { font-family:inherit; font-size:smaller }
|
||
|
|
pre.smallexample { font-size:smaller }
|
||
|
|
pre.smalllisp { font-size:smaller }
|
||
|
|
span.sc { font-variant:small-caps }
|
||
|
|
span.roman { font-family:serif; font-weight:normal; }
|
||
|
|
span.sansserif { font-family:sans-serif; font-weight:normal; }
|
||
|
|
--></style>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<div class="node">
|
||
|
|
<a name="i386-LWP"></a>
|
||
|
|
<a name="i386_002dLWP"></a>
|
||
|
|
<p>
|
||
|
|
Next: <a rel="next" accesskey="n" href="i386_002dBMI.html#i386_002dBMI">i386-BMI</a>,
|
||
|
|
Previous: <a rel="previous" accesskey="p" href="i386_002dSIMD.html#i386_002dSIMD">i386-SIMD</a>,
|
||
|
|
Up: <a rel="up" accesskey="u" href="i386_002dDependent.html#i386_002dDependent">i386-Dependent</a>
|
||
|
|
<hr>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<h4 class="subsection">9.16.11 AMD's Lightweight Profiling Instructions</h4>
|
||
|
|
|
||
|
|
<p><a name="index-LWP_002c-i386-1255"></a><a name="index-LWP_002c-x86_002d64-1256"></a>
|
||
|
|
<code>as</code> supports AMD's Lightweight Profiling (LWP)
|
||
|
|
instruction set, available on AMD's Family 15h (Orochi) processors.
|
||
|
|
|
||
|
|
<p>LWP enables applications to collect and manage performance data, and
|
||
|
|
react to performance events. The collection of performance data
|
||
|
|
requires no context switches. LWP runs in the context of a thread and
|
||
|
|
so several counters can be used independently across multiple threads.
|
||
|
|
LWP can be used in both 64-bit and legacy 32-bit modes.
|
||
|
|
|
||
|
|
<p>For detailed information on the LWP instruction set, see the
|
||
|
|
<cite>AMD Lightweight Profiling Specification</cite> available at
|
||
|
|
<a href="http://developer.amd.com/cpu/LWP">Lightweight Profiling Specification</a>.
|
||
|
|
|
||
|
|
</body></html>
|
||
|
|
|