Date: Fri, 26 May 2006 16:15:51 +0800 From: "etalk etalk" <yanyuejin2004@hotmail.com> To: kris@obsecurity.org, freebsd-fs@freebsd.org, freebsd-fs-request@freebsd.org, freebsd-performance-request@freebsd.org Subject: Re: about ufs filesystem io performance! Message-ID: <BAY23-F22A0CFB48436827E576B5BBB9E0@phx.gbl> In-Reply-To: <20060525215810.GB31540@xor.obsecurity.org>
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>From: Kris Kennaway <kris@obsecurity.org> >To: etalk etalk <yanyuejin2004@hotmail.com> >CC: freebsd-fs@freebsd.org, freebsd-performance-request@freebsd.org >Subject: Re: about ufs filesystem io performance! >Date: Thu, 25 May 2006 17:58:10 -0400 > >On Thu, May 25, 2006 at 08:12:42PM +0800, etalk etalk wrote: > > 5.3 vs 6.0 > > The test tool is Iozone3_257, and the test command is ??./iozone -A -f > > /mnt/tmpfile.test -g 1g -n 1m -q 8k -y 2k -R -b outfile-Af.xls ?? > > (http://www.iozone.org/src/current/). We ran all the tests on the same PC > > with 2.4 GHz Pentium CPU and 512M main memory. Figure1~Figure5 show the > > results of the file system performance comparison between Bsd5.3??s UFS2 > > and Bsd6.0??s UFS2 when testing with different file system (local, sync, > > async, softupdate, sync+softupdate). > > > > According to the figures, our conclusion is: > > On all kinds of file systems, the write, rewrite, read and reread > > performance of the two is almost same and we cant say that Bsd6.0 make a > > improvement on file system IO performance. > >Very unlikely, since the former is giant locked and the latter not. I >saw a performance improvement of up to a factor of 7 in favour of 6.0 >when I tested concurrent I/O. > >http://people.freebsd.org/~kris/bsdcan/Filesystem%20Performance.pdf > >If this is truly what you're seeing, then you're probably hitting some >other bottleneck and not actually testing filesystem performance. > >Kris I can not see the pdf file,and how can i test concurrent I/O in 5.3 vs 6.0, is there some tools or patch? ><< attach3 >> _________________________________________________________________ 与联机的朋友进行交流，请使用 MSN Messenger: http://messenger.msn.com/cn
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