Date: Wed, 31 Jan 2007 10:12:10 +1100 From: Peter Jeremy <peterjeremy@optushome.com.au> To: Robert Huff <roberthuff@rcn.com> Cc: freebsd-current@freebsd.org Subject: Re: Interesting speed benchmarks Message-ID: <20070130231210.GR892@turion.vk2pj.dyndns.org> In-Reply-To: <17855.41967.928998.142397@jerusalem.litteratus.org> References: <20070126224352.GD927@turion.vk2pj.dyndns.org> <17854.27369.656331.328734@jerusalem.litteratus.org> <20070130075708.GB892@turion.vk2pj.dyndns.org> <17855.41967.928998.142397@jerusalem.litteratus.org>
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--z+pzSjdB7cqptWpS Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, 2007-Jan-30 15:00:47 -0500, Robert Huff wrote: >huff@>>dump 0 -La -C 32 -f /dev/null /usr >& /tmp/null_dump > DUMP: DUMP: 27162681 tape blocks on 1 volume > DUMP: finished in 12961 seconds, throughput 2095 KBytes/sec Still fairly atrocious. What about: dd if=3D/dev/da1s1d of=3D/dev/null bs=3D2k count=3D5120 dd if=3D/dev/da1s1d of=3D/dev/null bs=3D16k count=3D640 dd if=3D/dev/da1s1d of=3D/dev/null bs=3D64k count=3D160 >Filesystem 1024-blocks Used Avail Capacity iused ifree %iused M= ounted on >/dev/da1s1d 46287340 26883474 15700880 63% 423220 5582538 7% /= usr There's definitely something amiss on your system. I don't have a SCSI system at home but I see: # dump -0a -f /dev/null -C 32 -L /var =2E.. DUMP: DUMP: 5825156 tape blocks on 1 volume DUMP: finished in 533 seconds, throughput 10928 KBytes/sec #=20 # dump -0a -f /dev/null -C 32 -L /usr =2E.. DUMP: DUMP: 2883438 tape blocks on 1 volume DUMP: finished in 391 seconds, throughput 7374 KBytes/sec # df -ki /usr /var Filesystem 1K-blocks Used Avail Capacity iused ifree %iused Mo= unte /dev/ad3s1d 8122126 2744650 4727706 37% 165650 894188 16% /u= sr /dev/ad3s1e 8114104 5686582 1778394 76% 174183 885655 16% /v= ar Even my laptop manages: # df -ki /usr Filesystem 1K-blocks Used Avail Capacity iused ifree %iused Mount= ed /dev/ad0s2e 16244334 13028280 1916508 87% 616595 1503083 29% /usr # dump -0a -f /dev/null -C 32 -L /usr =2E.. DUMP: DUMP: 13507693 tape blocks on 1 volume DUMP: finished in 1425 seconds, throughput 9479 KBytes/sec One last possibility: Is something else hammering da1? You might like to have a look at iostat or systat -v and see if there's anything that looks odd. --=20 Peter Jeremy --z+pzSjdB7cqptWpS Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iD8DBQFFv9DK/opHv/APuIcRArCSAJ9IadP/GPvcnYH4RavYbedcPQyHYQCgnQX/ 8PskYS+UJH2KIHxSoRLWYu8= =dEyp -----END PGP SIGNATURE----- --z+pzSjdB7cqptWpS--
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