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| <div class="titlepage"><div><div><h2 class="title" style="clear: both"> |
| <a name="context.performance"></a><a class="link" href="performance.html" title="Performance">Performance</a> |
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| <p> |
| Performance of <span class="bold"><strong>Boost.Context</strong></span> was measured |
| on the platforms shown in the following table. Performance measurements were |
| taken using <code class="computeroutput"><span class="identifier">rdtsc</span></code> and <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">chrono</span><span class="special">::</span><span class="identifier">high_resolution_clock</span></code>, |
| with overhead corrections, on x86 platforms. In each case, cache warm-up was |
| accounted for, and the one running thread was pinned to a single CPU. The code |
| was compiled using the build options, 'variant = release cxxflags = -DBOOST_DISABLE_ASSERTS'. |
| </p> |
| <div class="table"> |
| <a name="context.performance.performance_of_context_switch"></a><p class="title"><b>Table 1.1. Performance of context switch</b></p> |
| <div class="table-contents"><table class="table" summary="Performance of context switch"> |
| <colgroup> |
| <col> |
| <col> |
| <col> |
| <col> |
| </colgroup> |
| <thead><tr> |
| <th> |
| <p> |
| Platform |
| </p> |
| </th> |
| <th> |
| <p> |
| ucontext_t |
| </p> |
| </th> |
| <th> |
| <p> |
| fcontext_t |
| </p> |
| </th> |
| <th> |
| <p> |
| windows fibers |
| </p> |
| </th> |
| </tr></thead> |
| <tbody> |
| <tr> |
| <td> |
| <p> |
| i386 <a href="#ftn.context.performance.f0" class="footnote" name="context.performance.f0"><sup class="footnote">[a]</sup></a> |
| </p> |
| </td> |
| <td> |
| <p> |
| 708 ns / 754 cycles |
| </p> |
| </td> |
| <td> |
| <p> |
| 37 ns / 37 cycles |
| </p> |
| </td> |
| <td> |
| <p> |
| ns / cycles |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| x86_64 <a href="#ftn.context.performance.f1" class="footnote" name="context.performance.f1"><sup class="footnote">[b]</sup></a> |
| </p> |
| </td> |
| <td> |
| <p> |
| 547 ns / 1433 cycles |
| </p> |
| </td> |
| <td> |
| <p> |
| 8 ns / 23 cycles |
| </p> |
| </td> |
| <td> |
| <p> |
| ns / cycles |
| </p> |
| </td> |
| </tr> |
| </tbody> |
| <tbody class="footnotes"><tr><td colspan="4"> |
| <div id="ftn.context.performance.f0" class="footnote"><p><a href="#context.performance.f0" class="para"><sup class="para">[a] </sup></a> |
| AMD Athlon 64 DualCore 4400+ |
| </p></div> |
| <div id="ftn.context.performance.f1" class="footnote"><p><a href="#context.performance.f1" class="para"><sup class="para">[b] </sup></a> |
| Intel Core2 Q6700 |
| </p></div> |
| </td></tr></tbody> |
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| <td align="left"></td> |
| <td align="right"><div class="copyright-footer">Copyright © 2014 Oliver Kowalke<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) |
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