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| author | Jacob McDonnell <jacob@jacobmcdonnell.com> | 2026-04-25 19:55:43 -0400 |
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| committer | Jacob McDonnell <jacob@jacobmcdonnell.com> | 2026-04-25 19:55:43 -0400 |
| commit | ac5e55f5f2af5b92794c2aded46c6bae85b5f5ed (patch) | |
| tree | 9367490586c84cba28652e443e3166d66c33b0d9 /static/freebsd/man4/cc_cubic.4 3.html | |
| parent | 253e67c8b3a72b3a4757fdbc5845297628db0a4a (diff) | |
docs: Added All FreeBSD Manuals
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| -rw-r--r-- | static/freebsd/man4/cc_cubic.4 3.html | 94 |
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diff --git a/static/freebsd/man4/cc_cubic.4 3.html b/static/freebsd/man4/cc_cubic.4 3.html new file mode 100644 index 00000000..117c6659 --- /dev/null +++ b/static/freebsd/man4/cc_cubic.4 3.html @@ -0,0 +1,94 @@ +<table class="head"> + <tr> + <td class="head-ltitle">CC_CUBIC(4)</td> + <td class="head-vol">Device Drivers Manual</td> + <td class="head-rtitle">CC_CUBIC(4)</td> + </tr> +</table> +<div class="manual-text"> +<section class="Sh"> +<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1> +<p class="Pp"><code class="Nm">cc_cubic</code> — <span class="Nd">CUBIC + Congestion Control Algorithm</span></p> +</section> +<section class="Sh"> +<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1> +<p class="Pp">The CUBIC congestion control algorithm was designed to provide + increased throughput in fast and long-distance networks. The CUBIC + congestion control algorithm is the default for TCP. It attempts to maintain + fairness when competing with legacy NewReno TCP in lower speed scenarios + where NewReno is able to operate adequately.</p> +<p class="Pp">The congestion window is increased as a function of the time + elapsed since the last congestion event. During regular operation, the + window increase function follows a cubic function, with the inflection point + set to be the congestion window value reached at the last congestion event. + CUBIC also calculates an estimate of the congestion window that NewReno + would have achieved at a given time after a congestion event. When updating + the congestion window, the algorithm will choose the larger of the + calculated CUBIC and estimated NewReno windows.</p> +<p class="Pp">CUBIC also backs off less on congestion by changing the + multiplicative decrease factor from 1/2 (used by standard NewReno TCP) to + 4/5.</p> +<p class="Pp">The implementation was done in a clean-room fashion, and is based + on the Internet Draft and paper referenced in the + <a class="Sx" href="#SEE_ALSO">SEE ALSO</a> section below.</p> +</section> +<section class="Sh"> +<h1 class="Sh" id="MIB_Variables"><a class="permalink" href="#MIB_Variables">MIB + Variables</a></h1> +<p class="Pp">There are currently no tunable MIB variables.</p> +</section> +<section class="Sh"> +<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE + ALSO</a></h1> +<p class="Pp"><a class="Xr">cc_cdg(4)</a>, <a class="Xr">cc_chd(4)</a>, + <a class="Xr">cc_dctcp(4)</a>, <a class="Xr">cc_hd(4)</a>, + <a class="Xr">cc_htcp(4)</a>, <a class="Xr">cc_newreno(4)</a>, + <a class="Xr">cc_vegas(4)</a>, <a class="Xr">mod_cc(4)</a>, + <a class="Xr">tcp(4)</a>, <a class="Xr">mod_cc(9)</a></p> +<p class="Pp"><cite class="Rs"><span class="RsA">Sangtae Ha</span>, + <span class="RsA">Injong Rhee</span>, and <span class="RsA">Lisong + Xu</span>, <span class="RsT">CUBIC for Fast Long-Distance Networks</span>, + <a class="RsU" href="https://tools.ietf.org/id/draft-rhee-tcpm-cubic-02.txt">https://tools.ietf.org/id/draft-rhee-tcpm-cubic-02.txt</a>.</cite></p> +<p class="Pp"><cite class="Rs"><span class="RsA">Sangtae Ha</span>, + <span class="RsA">Injong Rhee</span>, and <span class="RsA">Lisong + Xu</span>, <span class="RsT">CUBIC: a new TCP-friendly high-speed TCP + variant</span>, <i class="RsJ">SIGOPS Oper. Syst. Rev.</i>, + <span class="RsN">5</span>, <span class="RsV">42</span>, + <span class="RsP">64-74</span>, <span class="RsD">July + 2008</span>.</cite></p> +</section> +<section class="Sh"> +<h1 class="Sh" id="ACKNOWLEDGEMENTS"><a class="permalink" href="#ACKNOWLEDGEMENTS">ACKNOWLEDGEMENTS</a></h1> +<p class="Pp">Development and testing of this software were made possible in + part by grants from the FreeBSD Foundation and Cisco University Research + Program Fund at Community Foundation Silicon Valley.</p> +</section> +<section class="Sh"> +<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1> +<p class="Pp">The <code class="Nm">cc_cubic</code> congestion control module + first appeared in <span class="Ux">FreeBSD 9.0</span>.</p> +<p class="Pp">This became the default congestion algorithm for FreeBSD in + version <span class="Ux">FreeBSD 14.0</span>, replacing + <a class="Xr">cc_newreno(4)</a>.</p> +<p class="Pp">The module was first released in 2009 by Lawrence Stewart whilst + studying at Swinburne University of Technology's Centre for Advanced + Internet Architectures, Melbourne, Australia. More details are available + at:</p> +<p class="Pp">http://caia.swin.edu.au/urp/newtcp/</p> +</section> +<section class="Sh"> +<h1 class="Sh" id="AUTHORS"><a class="permalink" href="#AUTHORS">AUTHORS</a></h1> +<p class="Pp">The <code class="Nm">cc_cubic</code> congestion control module and + this manual page were written by <span class="An">Lawrence Stewart</span> + <<a class="Mt" href="mailto:lstewart@FreeBSD.org">lstewart@FreeBSD.org</a>> + and <span class="An">David Hayes</span> + <<a class="Mt" href="mailto:david.hayes@ieee.org">david.hayes@ieee.org</a>>.</p> +</section> +</div> +<table class="foot"> + <tr> + <td class="foot-date">February 4, 2023</td> + <td class="foot-os">FreeBSD 15.0</td> + </tr> +</table> |
