diff options
Diffstat (limited to 'static/freebsd/man4/cc_newreno.4 3.html')
| -rw-r--r-- | static/freebsd/man4/cc_newreno.4 3.html | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/static/freebsd/man4/cc_newreno.4 3.html b/static/freebsd/man4/cc_newreno.4 3.html deleted file mode 100644 index 3328b3c4..00000000 --- a/static/freebsd/man4/cc_newreno.4 3.html +++ /dev/null @@ -1,140 +0,0 @@ -<table class="head"> - <tr> - <td class="head-ltitle">CC_NEWRENO(4)</td> - <td class="head-vol">Device Drivers Manual</td> - <td class="head-rtitle">CC_NEWRENO(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_newreno</code> — - <span class="Nd">NewReno Congestion Control Algorithm</span></p> -</section> -<section class="Sh"> -<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1> -<p class="Pp"><code class="In">#include - <<a class="In">netinet/cc/cc_newreno.h</a>></code></p> -</section> -<section class="Sh"> -<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1> -<p class="Pp">Details about the algorithm can be found in RFC5681.</p> -</section> -<section class="Sh"> -<h1 class="Sh" id="Socket_Options"><a class="permalink" href="#Socket_Options">Socket - Options</a></h1> -<p class="Pp">The <code class="Nm">cc_newreno</code> module supports a number of - socket options under TCP_CCALGOOPT (refer to <a class="Xr">tcp(4)</a> and - <a class="Xr">mod_cc(9)</a> for details) which can be set with - <a class="Xr">setsockopt(2)</a> and tested with - <a class="Xr">getsockopt(2)</a>. The <code class="Nm">cc_newreno</code> - socket options use this structure defined in - <sys/netinet/cc/cc_newreno.h>:</p> -<div class="Bd Pp Li"> -<pre>struct cc_newreno_opts { - int name; - uint32_t val; -}</pre> -</div> -<dl class="Bl-tag"> - <dt id="CC_NEWRENO_BETA"><var class="Va">CC_NEWRENO_BETA</var></dt> - <dd>Multiplicative window decrease factor, specified as a percentage, applied - to the congestion window in response to a congestion signal per: cwnd = - (cwnd * CC_NEWRENO_BETA) / 100. Default is 50.</dd> - <dt id="CC_NEWRENO_BETA_ECN"><var class="Va">CC_NEWRENO_BETA_ECN</var></dt> - <dd>Multiplicative window decrease factor, specified as a percentage, applied - to the congestion window in response to an ECN congestion signal when - <var class="Va">net.inet.tcp.cc.abe=1</var> per: cwnd = (cwnd * - CC_NEWRENO_BETA_ECN) / 100. Default is 80. - <p class="Pp">Note that currently the only way to enable hystart++ is to - enable it via socket option. When enabling it a value of 1 will enable - precise internet-draft (version 4) behavior (subject to any MIB variable - settings), other setting (2 and 3) are experimental.</p> - </dd> -</dl> -<p class="Pp">Note that hystart++ requires the TCP stack be able to call to the - congestion controller with both the <var class="Va">newround</var> function - as well as the <var class="Va">rttsample</var> function. Currently the only - TCP stacks that provide this feedback to the congestion controller is - rack.</p> -</section> -<section class="Sh"> -<h1 class="Sh" id="MIB_Variables"><a class="permalink" href="#MIB_Variables">MIB - Variables</a></h1> -<p class="Pp">The algorithm exposes these variables in the - <var class="Va">net.inet.tcp.cc.newreno</var> branch of the - <a class="Xr">sysctl(3)</a> MIB:</p> -<dl class="Bl-tag"> - <dt id="beta"><var class="Va">beta</var></dt> - <dd>Multiplicative window decrease factor, specified as a percentage, applied - to the congestion window in response to a congestion signal per: cwnd = - (cwnd * beta) / 100. Default is 50.</dd> - <dt id="beta_ecn"><var class="Va">beta_ecn</var></dt> - <dd>Multiplicative window decrease factor, specified as a percentage, applied - to the congestion window in response to an ECN congestion signal when - <var class="Va">net.inet.tcp.cc.abe=1</var> per: cwnd = (cwnd * beta_ecn) - / 100. Default is 80.</dd> -</dl> -</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_cubic(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_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">Mark Allman</span>, - <span class="RsA">Vern Paxson</span>, and <span class="RsA">Ethan - Blanton</span>, <span class="RsT">TCP Congestion Control</span>, - <span class="RsO">RFC 5681</span>.</cite></p> -<p class="Pp"><cite class="Rs"><span class="RsA">Naeem Khademi</span>, - <span class="RsA">Michael Welzl</span>, <span class="RsA">Grenville - Armitage</span>, and <span class="RsA">Gorry Fairhurst</span>, - <span class="RsT">TCP Alternative Backoff with ECN (ABE)</span>, - <span class="RsO">RFC 8511</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_newreno</code> congestion control - algorithm first appeared in its modular form in <span class="Ux">FreeBSD - 9.0</span>.</p> -<p class="Pp">This was the default congestion control algorithm in FreeBSD - before version <span class="Ux">FreeBSD 14.0</span>, after which - <a class="Xr">cc_cubic(4)</a> replaced it.</p> -<p class="Pp">The module was first released in 2007 by James Healy and Lawrence - Stewart whilst working on the NewTCP research project at Swinburne - University of Technology's Centre for Advanced Internet Architectures, - Melbourne, Australia, which was made possible in part by a grant from the - Cisco University Research Program Fund at Community Foundation Silicon - Valley. 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_newreno</code> congestion control module - was written by <span class="An">James Healy</span> - <<a class="Mt" href="mailto:jimmy@deefa.com">jimmy@deefa.com</a>>, - <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> -<p class="Pp">Support for TCP ABE was added by <span class="An">Tom Jones</span> - <<a class="Mt" href="mailto:tj@enoti.me">tj@enoti.me</a>>.</p> -<p class="Pp">This manual page was written by <span class="An">Lawrence - Stewart</span> - <<a class="Mt" href="mailto:lstewart@FreeBSD.org">lstewart@FreeBSD.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> |