Date: Sun, 18 Oct 2015 22:06:12 +0000 (UTC) From: Benjamin Kaduk <bjk@FreeBSD.org> To: doc-committers@freebsd.org, svn-doc-all@freebsd.org, svn-doc-head@freebsd.org Subject: svn commit: r47621 - head/en_US.ISO8859-1/htdocs/news/status Message-ID: <201510182206.t9IM6CYK026005@repo.freebsd.org>
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Author: bjk Date: Sun Oct 18 22:06:12 2015 New Revision: 47621 URL: https://svnweb.freebsd.org/changeset/doc/47621 Log: Add automtud report from jmg Modified: head/en_US.ISO8859-1/htdocs/news/status/report-2015-07-2015-09.xml Modified: head/en_US.ISO8859-1/htdocs/news/status/report-2015-07-2015-09.xml ============================================================================== --- head/en_US.ISO8859-1/htdocs/news/status/report-2015-07-2015-09.xml Sun Oct 18 21:54:09 2015 (r47620) +++ head/en_US.ISO8859-1/htdocs/news/status/report-2015-07-2015-09.xml Sun Oct 18 22:06:12 2015 (r47621) @@ -3186,4 +3186,59 @@ </help> </project> + <project cat='proj'> + <title>automtud: Better Jumbo Frame Support</title> + + <contact> + <person> + <name> + <given>John-Mark</given> + <common>Gurney</common> + </name> + <email>jmg@FreeBSD.org</email> + </person> + </contact> + + <links> + <url href="https://github.com/jmgurney/automtud">jmgurney/automtud + on github</url> + </links> + + <body> + <p>The <tt>automtud</tt> script will allow a &os; machine to send + jumbo frames to machines that support them, while using + normal-sized frames for other machines.</p> + + <p>There are various advantages to using jumbo frames, + such as reduced protocol overhead. It also means that TCP streams + will not be segmented as much (though TSO helps mitigate the + disadvantages of such segmentation) and in cases where LRO does + not work well, fewer packets will be received.</p> + + <p>The script currently does not restore the system to its + original state when it exits. This means that you will have to + manually change the interface MTU and manually delete host routes + after stopping the script. + </p> + </body> + + <help> + <task> + <p>Fix up various ethernet drivers to better support jumbo frames. + Most ethernet drivers, though they support scatter/gather, use a + physically contiguous zone to do so, which can cause resource + shortages.</p> + </task> + + <task> + <p>More testing is needed to ensure that things behave as + expected. This means that when running the script, communication + to all machines functions normanlly, without slowdown or + connectivity issues. Check `vmstat -z | grep mbuf' to ensure that + such issues are not due to running out of jumbo_9k or jumbo_16k + buffers due to ethernet driver issue.</p> + </task> + </help> + </project> + </report>
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