Date: Thu, 9 Jan 2014 19:08:07 +0000 (UTC) From: Gabor Pali <pgj@FreeBSD.org> To: doc-committers@freebsd.org, svn-doc-all@freebsd.org, svn-doc-head@freebsd.org Subject: svn commit: r43458 - head/en_US.ISO8859-1/htdocs/news/status Message-ID: <201401091908.s09J87bF077787@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: pgj Date: Thu Jan 9 19:08:06 2014 New Revision: 43458 URL: http://svnweb.freebsd.org/changeset/doc/43458 Log: - Add a 2013Q4 report entry on ZFS/NFS improvements Submitted by: mav Modified: head/en_US.ISO8859-1/htdocs/news/status/report-2013-10-2013-12.xml Modified: head/en_US.ISO8859-1/htdocs/news/status/report-2013-10-2013-12.xml ============================================================================== --- head/en_US.ISO8859-1/htdocs/news/status/report-2013-10-2013-12.xml Thu Jan 9 16:51:55 2014 (r43457) +++ head/en_US.ISO8859-1/htdocs/news/status/report-2013-10-2013-12.xml Thu Jan 9 19:08:06 2014 (r43458) @@ -19,7 +19,7 @@ <!-- XXX: Keep updating the number of entries --> <p>Thanks to all the reporters for the excellent work! This report - contains 9 entries and we hope you enjoy reading it.</p> + contains 10 entries and we hope you enjoy reading it.</p> <p>The deadline for submissions covering between January and March 2014 is April 7th, 2014.</p> @@ -38,6 +38,12 @@ </category> <category> + <name>kern</name> + + <description>Kernel</description> + </category> + + <category> <name>arch</name> <description>Architectures</description> @@ -498,4 +504,59 @@ reports!</task> </help> </project> + + <project cat='kern'> + <title>UMA/ZFS and RPC/NFS Performance Improvements</title> + + <contact> + <person> + <name> + <given>Alexander</given> + <common>Motin</common> + </name> + <email>mav@FreeBSD.org</email> + </person> + </contact> + + <links> + <url href="http://docs.freebsd.org/cgi/mid.cgi?52894C92.60905">Discussion of the ZFS/UMA changes</url> + </links> + + <body> + <p>The performance of ZFS and NFS was suboptimal in &os;, so we + have recently investigated some possible improvement paths. The + <tt>uma(9)</tt> memory allocator caching code was improved to + adapt better to system memory constraints. Combined with other + virtual memory subsystem improvements done in the previous + years, it should be safe to actively use <tt>uma(9)</tt> caches + now. It may be enabled for ZFS to use them for ZIO/ARC via the + <tt>vfs.zfs.zio.use_uma</tt> <tt>loader(8)</tt> tunable, which + is now the default for amd64, where it is recommended. Use of + <tt>uma(9)</tt> caches for LZ4 compression buffers is + unconditionally enabled on all architectures as it is has no + serious drawbacks. On systems with many CPUs, these changes + doubled the performance in the benchmarks.</p> + + <p>Several areas of the NFS server stack (RPC, FHA, DRC) got + number of fixes and performance optimizations that significantly + improves the performance and reduces the CPU usage in number of + tests. Together with the ZFS memory allocator changes mentioned + above, it was possible to reach 200K NFS block read IOPS and 55K + SPEC NFS IOPS.</p> + + <p>The code was committed to <tt>head</tt>. The <tt>uma(9)</tt> + ZFS commits have been already merged to <tt>stable/10</tt>, and + the remainder will be done soon as well.</p> + + <p>The project is sponsored by iXsystems, Inc.</p> + </body> + + <help> + <task>The SPEC NFS test hits lock congestion on several global + locks in the file system layer when a quite intensive + <tt>READDIRPLUS</tt> NFS request is received. Fixing this + problem could improve the performance on large systems even + further.</task> + </help> + </project> </report>
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201401091908.s09J87bF077787>