svn commit: r48590 - head/en_US.ISO8859-1/htdocs/news/status
Warren Block <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.cvs.doc |
|---|---|
| Message-ID | <[email protected]> |
Author: wblock Date: Tue Apr 12 22:10:52 2016 New Revision: 48590 URL: https://svnweb.freebsd.org/changeset/doc/48590 Log: Add build and filemon reports from Bryan Drewery <[email protected]>. Modified: head/en_US.ISO8859-1/htdocs/news/status/report-2016-01-2016-03.xml Modified: head/en_US.ISO8859-1/htdocs/news/status/report-2016-01-2016-03.xml ============================================================================== --- head/en_US.ISO8859-1/htdocs/news/status/report-2016-01-2016-03.xml Tue Apr 12 22:02:21 2016 (r48589) +++ head/en_US.ISO8859-1/htdocs/news/status/report-2016-01-2016-03.xml Tue Apr 12 22:10:52 2016 (r48590) @@ -934,4 +934,139 @@ </body> <help></help> </project> + + <project cat='misc'> + <title>FreeBSD Build</title> + + <contact> + <person> + <name> + <given>Bryan</given> + <common>Drewery</common> + </name> + <email>[email protected]</email> + </person> + </contact> + + <links></links> + + <body> + <p>Build improvements for buildworld on <em>head</em> continue. + Some highlights include:</p> + + <ul> + <li><em>WITH_FAST_DEPEND</em> was made default in r296668 and + later made the only option in r297434. The new depend code + avoids a 'make depend' tree walk and generates .depend files + during build as a side-effect of compiling. This is using + the -MF flags of the compiler. This speeds up the build by + 15-35%.</li> + + <li><a href="http://bugs.freebsd.org/196193">PR 196193</a>: + <em>WITHOUT_CROSS_COMPILER</em> was fixed to properly use + <em>--sysroot</em> which allows the option to work in more + cases. It is still unsafe when major compiler upgrades + occur. Further work is planned to improve that still.</li> + + <li><em>WITHOUT_TOOLCHAIN</em> now properly builds.</li> + </ul> + </body> + + <sponsor> + EMC / Isilon Storage Division + </sponsor> + + <help> + <task> + <p>Opportunistically skipping the bootstrap compiler phase of + buildworld.</p> + </task> + + <task> + <p>Skipping the 'make obj' tree walk.</p> + </task> + + <task> + <p>Enabling <em>WITH_META_MODE</em> in buildworld to provide a + reliable incremental build using filemon(4) and bmake's + .MAKE.MODE=meta. This should not be confused with + <em>WITH_DIRDEPS_BUILD</em> which previously was named + <em>WITH_META_MODE</em> and is a drastically different build + system presented at BSDCan 2014 by Simon Gerraty.</p> + </task> + </help> + </project> + + <project cat='kern'> + <title>Filemon performance/stability improvements</title> + + <contact> + <person> + <name> + <given>Bryan</given> + <common>Drewery</common> + </name> + <email>[email protected]</email> + </person> + + <person> + <name> + <given>Mateusz</given> + <common>Guzik</common> + </name> + <email>[email protected]</email> + </person> + </contact> + + <links></links> + + <body> + <p>Filemon is a kernel module for tracing which files a command + creates, reads, writes or executes. It allows tracking build + dependencies in combination with bmake's meta mode. Bmake + will store filemon's output in a .meta file along with the + build command and later use this to check if any of the files + references are missing or modified, or if the build command + changes, to trigger a rebuild of the target. It provides the + same functionality as compiler -MF flags but for everything. + It will be critical for buildworld's <em>WITH_META_MODE</em> + (which is the normal buildworld but just using filemon) to + provide a reliable incremental build without even the need of + .depend files or compiler -MF flags. This will allow + <em>-DNO_CLEAN</em> to work all of the time.</p> + + <p>Over this quarter filemon on head was improved for stability + and performance. It no longer causes every syscall it hooks + into to loop on processes looking for a matching filemon + struct. It now just attaches directly to the struct proc with + its own pointer. This improves performance by reducing lock + contention during a build using it. Much other work went into + improving error handling and other stability issues in the + module as well.</p> + + <p>All of this work was done by Bryan Drewery, sponsored by EMC, + but much help and identification of bugs was provided by + Mateusz Guzik.</p> + </body> + + <sponsor> + EMC / Isilon Storage Division + </sponsor> + + <help> + <task> + <p>Improving credential handling</p> + </task> + + <task> + <p>Improving EVENTHANDLER performance</p> + </task> + + <task> + <p>Possibly providing a framework for syscallenter/syscallret + hooking to avoid the need to hook syscalls as Filemon + does.</p> + </task> + </help> + </project> </report> _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/svn-doc-all To unsubscribe, send any mail to "[email protected]"