From owner-svn-doc-all@FreeBSD.ORG Thu Jan 9 19:08:07 2014 Return-Path: Delivered-To: svn-doc-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 71834296; Thu, 9 Jan 2014 19:08:07 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 5DBFB1448; Thu, 9 Jan 2014 19:08:07 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.7/8.14.7) with ESMTP id s09J87Fq077788; Thu, 9 Jan 2014 19:08:07 GMT (envelope-from pgj@svn.freebsd.org) Received: (from pgj@localhost) by svn.freebsd.org (8.14.7/8.14.7/Submit) id s09J87bF077787; Thu, 9 Jan 2014 19:08:07 GMT (envelope-from pgj@svn.freebsd.org) Message-Id: <201401091908.s09J87bF077787@svn.freebsd.org> From: Gabor Pali Date: Thu, 9 Jan 2014 19:08:07 +0000 (UTC) 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 X-SVN-Group: doc-head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-doc-all@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: "SVN commit messages for the entire doc trees \(except for " user" , " projects" , and " translations" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 09 Jan 2014 19:08:07 -0000 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 @@

Thanks to all the reporters for the excellent work! This report - contains 9 entries and we hope you enjoy reading it.

+ contains 10 entries and we hope you enjoy reading it.

The deadline for submissions covering between January and March 2014 is April 7th, 2014.

@@ -38,6 +38,12 @@ + kern + + Kernel + + + arch Architectures @@ -498,4 +504,59 @@ reports! + + + UMA/ZFS and RPC/NFS Performance Improvements + + + + + Alexander + Motin + + mav@FreeBSD.org + + + + + Discussion of the ZFS/UMA changes + + + +

The performance of ZFS and NFS was suboptimal in &os;, so we + have recently investigated some possible improvement paths. The + uma(9) 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 uma(9) caches + now. It may be enabled for ZFS to use them for ZIO/ARC via the + vfs.zfs.zio.use_uma loader(8) tunable, which + is now the default for amd64, where it is recommended. Use of + uma(9) 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.

+ +

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.

+ +

The code was committed to head. The uma(9) + ZFS commits have been already merged to stable/10, and + the remainder will be done soon as well.

+ +

The project is sponsored by iXsystems, Inc.

+ + + + The SPEC NFS test hits lock congestion on several global + locks in the file system layer when a quite intensive + READDIRPLUS NFS request is received. Fixing this + problem could improve the performance on large systems even + further. + +