2012-12-18 12:08:33 +01:00
|
|
|
|
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
|
2017-10-25 16:18:43 +02:00
|
|
|
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Empirical Cost Model</title><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><meta name="keywords" content="C++, library, profile" /><meta name="keywords" content="ISO C++, library" /><meta name="keywords" content="ISO C++, runtime, library" /><link rel="home" href="../index.html" title="The GNU C++ Library" /><link rel="up" href="profile_mode.html" title="Chapter 19. Profile Mode" /><link rel="prev" href="profile_mode_api.html" title="Extensions for Custom Containers" /><link rel="next" href="profile_mode_impl.html" title="Implementation Issues" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Empirical Cost Model</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="profile_mode_api.html">Prev</a> </td><th width="60%" align="center">Chapter 19. Profile Mode</th><td width="20%" align="right"> <a accesskey="n" href="profile_mode_impl.html">Next</a></td></tr></table><hr /></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="manual.ext.profile_mode.cost_model"></a>Empirical Cost Model</h2></div></div></div><p>
|
2012-12-18 12:08:33 +01:00
|
|
|
|
Currently, the cost model uses formulas with predefined relative weights
|
|
|
|
|
for alternative containers or container implementations. For instance,
|
|
|
|
|
iterating through a vector is X times faster than iterating through a list.
|
|
|
|
|
</p><p>
|
|
|
|
|
(Under development.)
|
|
|
|
|
We are working on customizing this to a particular machine by providing
|
|
|
|
|
an automated way to compute the actual relative weights for operations
|
|
|
|
|
on the given machine.
|
|
|
|
|
</p><p>
|
|
|
|
|
(Under development.)
|
|
|
|
|
We plan to provide a performance parameter database format that can be
|
|
|
|
|
filled in either by hand or by an automated training mechanism.
|
|
|
|
|
The analysis module will then use this database instead of the built in.
|
|
|
|
|
generic parameters.
|
2013-02-12 00:24:26 +01:00
|
|
|
|
</p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="profile_mode_api.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="profile_mode.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="profile_mode_impl.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Extensions for Custom Containers </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> Implementation Issues</td></tr></table></div></body></html>
|