Date: Thu, 25 Aug 2005 11:29:57 +0200 From: Divacky Roman <xdivac02@stud.fit.vutbr.cz> To: JG <jarek@adeon.lublin.pl> Cc: freebsd-performance@freebsd.org Subject: Re: slow tar performance on fbsd5 Message-ID: <20050825092957.GA49525@stud.fit.vutbr.cz> In-Reply-To: <1168719770.20050824183357@adeon.lublin.pl> References: <1168719770.20050824183357@adeon.lublin.pl>
next in thread | previous in thread | raw e-mail | index | archive | help
cannot this be related to low value of nswbufs (fixed in curennt and I think releng_6)? On Wed, Aug 24, 2005 at 06:33:57PM +0200, JG wrote: > Hello, > > I had to unpack a lot of tar archives and I occasional noticed terrible > bad performance on freebsd5. > > This is my test file: > > 854251520 24 Sie 12:13 mysql-m.tgz > > There are some real MySQL tables in it, it has been done with tar > -cvf. This archive contains about 146.000 small files. > > --------------------------------------- > Unpacking it on FreeBSD5 gives me such results: > > # time tar -xf mysql-m.tgz > 2.130u 20.187s 7:02.69 5.2% 41+382k 13097+8205io 0pf+0w > ...so 7 minutes of real time. > > This is today's FreeBSD 5.4-STABLE but I also tried 5.4-release. > > That server is brand new Dell PE2850 with Seagate ST373207L SCSI > drive, no raid. Parition is default UFS2 mounted with noatime, softupdates on. > This is Dual Xeon 2.8, 2GB ram. > > My sysctls: > vfs.ufs.dirhash_maxmem=16777216 (much better than default 2MB) > machdep.hyperthreading_allowed=1 (better dd results) > kern.maxfiles=65536 > kern.maxfilesperproc=65536 > vfs.read_max=16 > > I've tried a few different kernels - I had results like 6-15 minutes > of real time. 6 minutes was the best. > > I've also tried standard sysctls, and with/without make.conf cputype. > I've tested bsdtar and gtar from ports (btw. gtar seems to be faster). > > I didn't noticed slowness of any other things on this server. I've quiet good DD results. > > Diskinfo shows: > # diskinfo -tv /dev/da3s1d > /dev/da3s1d > 512 # sectorsize > 73402366464 # mediasize in bytes (68G) > 143363997 # mediasize in sectors > 8923 # Cylinders according to firmware. > 255 # Heads according to firmware. > 63 # Sectors according to firmware. > > Seek times: > Full stroke: 250 iter in 3.107691 sec = 12.431 msec > Half stroke: 250 iter in 2.223141 sec = 8.893 msec > Quarter stroke: 500 iter in 3.595413 sec = 7.191 msec > Short forward: 400 iter in 1.832164 sec = 4.580 msec > Short backward: 400 iter in 2.047162 sec = 5.118 msec > Seq outer: 2048 iter in 0.315528 sec = 0.154 msec > Seq inner: 2048 iter in 0.320899 sec = 0.157 msec > Transfer rates: > outside: 102400 kbytes in 1.341191 sec = 76350 kbytes/sec > middle: 102400 kbytes in 1.536625 sec = 66640 kbytes/sec > inside: 102400 kbytes in 2.731570 sec = 37488 kbytes/sec > > > Soon I'll be able to post results from my other server powered by > FreeBSD 4.11 with poor SCSI, maybe in the night. > > ---------------------------------------- > This is result from Gentoo Linux on 2.6.x hardened kernel: > # time tar -xf mysql-m.tgz > > real 1m3.944s > user 0m1.702s > sys 0m15.794s > > Only ~one minute! Six times faster than on a FreeBSD. I'm not a linux > fan, and I don't want to tell you how good linux is, but I would to > find out what causes such bad results on my favourite FreeBSD... > > This one is noname server with Dual Xeon 2.8, 2GB ram. It has > SATA Maxtor drive. Partition is ext3 -T news, -O dir_index, with > atime! I've similar results with ReiserFS. > > ------------------------------------------ > > Both systems was good optimized - as good as I can. All services (like > mysql, apache) was terminated before my tests. Both FreeBSD's > locate.updatedb and Gentoo's updatedb disabled. > > > Thank you for any opinions or hints how to tune FreeBSD a bit. > > Best Regards, > JG > > _______________________________________________ > freebsd-performance@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-performance > To unsubscribe, send any mail to "freebsd-performance-unsubscribe@freebsd.org"
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20050825092957.GA49525>