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4 | <title>Performance</title> | |
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7 | <link rel="home" href="../../index.html" title="Chapter 1. Context"> | |
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24 | </div> | |
25 | <div class="section"> | |
26 | <div class="titlepage"><div><div><h3 class="title"> | |
27 | <a name="context.econtext.performance"></a><a class="link" href="performance.html" title="Performance">Performance</a> | |
28 | </h3></div></div></div> | |
29 | <p> | |
30 | Performance of <span class="bold"><strong>Boost.Context</strong></span> was measured | |
31 | on the platforms shown in the following table. Performance measurements were | |
32 | 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, | |
33 | on x86 platforms. In each case, cache warm-up was accounted for, and the | |
34 | one running thread was pinned to a single CPU. The code was compiled using | |
35 | the build options, 'variant = release cxxflags = -DBOOST_DISABLE_ASSERTS'. | |
36 | </p> | |
37 | <div class="table"> | |
38 | <a name="context.econtext.performance.performance_of_context_switch"></a><p class="title"><b>Table 1.1. Performance of context switch</b></p> | |
39 | <div class="table-contents"><table class="table" summary="Performance of context switch"> | |
40 | <colgroup> | |
41 | <col> | |
42 | <col> | |
43 | <col> | |
44 | <col> | |
45 | </colgroup> | |
46 | <thead><tr> | |
47 | <th> | |
48 | <p> | |
49 | Platform | |
50 | </p> | |
51 | </th> | |
52 | <th> | |
53 | <p> | |
54 | ucontext_t | |
55 | </p> | |
56 | </th> | |
57 | <th> | |
58 | <p> | |
59 | fcontext_t | |
60 | </p> | |
61 | </th> | |
62 | <th> | |
63 | <p> | |
64 | windows fibers | |
65 | </p> | |
66 | </th> | |
67 | </tr></thead> | |
68 | <tbody> | |
69 | <tr> | |
70 | <td> | |
71 | <p> | |
72 | i386 <sup>[<a name="context.econtext.performance.f0" href="#ftn.context.econtext.performance.f0" class="footnote">a</a>]</sup> | |
73 | </p> | |
74 | </td> | |
75 | <td> | |
76 | <p> | |
77 | 708 ns / 754 cycles | |
78 | </p> | |
79 | </td> | |
80 | <td> | |
81 | <p> | |
82 | 37 ns / 37 cycles | |
83 | </p> | |
84 | </td> | |
85 | <td> | |
86 | <p> | |
87 | ns / cycles | |
88 | </p> | |
89 | </td> | |
90 | </tr> | |
91 | <tr> | |
92 | <td> | |
93 | <p> | |
94 | x86_64 <sup>[<a name="context.econtext.performance.f1" href="#ftn.context.econtext.performance.f1" class="footnote">b</a>]</sup> | |
95 | </p> | |
96 | </td> | |
97 | <td> | |
98 | <p> | |
99 | 547 ns / 1433 cycles | |
100 | </p> | |
101 | </td> | |
102 | <td> | |
103 | <p> | |
104 | 8 ns / 23 cycles | |
105 | </p> | |
106 | </td> | |
107 | <td> | |
108 | <p> | |
109 | ns / cycles | |
110 | </p> | |
111 | </td> | |
112 | </tr> | |
113 | </tbody> | |
114 | <tbody class="footnotes"><tr><td colspan="4"> | |
115 | <div class="footnote"><p><sup>[<a name="ftn.context.econtext.performance.f0" href="#context.econtext.performance.f0" class="para">a</a>] </sup> | |
116 | AMD Athlon 64 DualCore 4400+ | |
117 | </p></div> | |
118 | <div class="footnote"><p><sup>[<a name="ftn.context.econtext.performance.f1" href="#context.econtext.performance.f1" class="para">b</a>] </sup> | |
119 | Intel Core2 Q6700 | |
120 | </p></div> | |
121 | </td></tr></tbody> | |
122 | </table></div> | |
123 | </div> | |
124 | <br class="table-break"> | |
125 | </div> | |
126 | <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> | |
127 | <td align="left"></td> | |
128 | <td align="right"><div class="copyright-footer">Copyright © 2014 Oliver Kowalke<p> | |
129 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
130 | 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>) | |
131 | </p> | |
132 | </div></td> | |
133 | </tr></table> | |
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