Date: Thu, 9 Jun 2005 15:31:09 -0300 (EST) From: <scuba@centroin.com.br> To: <freebsd-questions@freebsd.org> Subject: Re: mismatch results with disk performance Message-ID: <Pine.BSI.4.33.0506091527380.24584-100000@hypselo.centroin.com.br> In-Reply-To: <Pine.BSI.4.33.0506071836160.11749-100000@hypselo.centroin.com.br>
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Hi, =09No one else has seem this? =09I upgraded to 5.4 and the problem was kept. =09Should it be a problem with ICH5 driver? On Tue, 7 Jun 2005 scuba@centroin.com.br wrote: |Hi ALL, | |=09I hope it=B4s not a known issue. |=09I=B4ve installed (express) a FreeBSD 5.3 (I know it=B4s not the last |stable) on a new machine with the following hardware: | |=09Asus P4P800 SE (BIOS v. 1008) |=092GB RAM ( 4x 512 DDR400 ) |=092 HDD Samsung SP0802N (80GB 7200rpm ata-100) 80 pins cable. | |=09The HD were formated with newfs defaults, and the following |results were the same using both as master (primary e secondary) or with a |master / slave (same interface). | |=09With diskinfo both performance are the same, but with "dd", the |second disc (the slave or the secondary master), is always worst as if it |were working in DMA2. | |=09what should be the right results? | |=09Here are the results: | |=09DD: dd if=3D/dev/zero of=3DTEST count=3D1000 bs=3D64k | |=09master: 60 Mb/s |=09slave: 16 Mb/s | |=09The results with diskinfo (almost the same): | |/dev/ad0 |=09512 =09# sectorsize |=0980060424192 =09# mediasize in bytes (75G) |=09156368016 =09# mediasize in sectors |=09155127 =09# Cylinders according to firmware. |=0916 =09# Heads according to firmware. |=0963 =09# Sectors according to firmware. | |Seek times: |=09Full stroke:=09 250 iter in 5.477568 sec =3D 21.910 msec |=09Half stroke:=09 250 iter in 4.140590 sec =3D 16.562 msec |=09Quarter stroke:=09 500 iter in 6.093340 sec =3D 12.187 msec |=09Short forward:=09 400 iter in 2.088111 sec =3D 5.220 msec |=09Short backward:=09 400 iter in 2.532713 sec =3D 6.332 msec |=09Seq outer:=09 2048 iter in 0.261596 sec =3D 0.128 msec |=09Seq inner:=09 2048 iter in 0.259723 sec =3D 0.127 msec |Transfer rates: |=09outside: 102400 kbytes in 1.743910 sec =3D 58719 kbytes/sec |=09middle: 102400 kbytes in 2.031982 sec =3D 50394 kbytes/sec |=09inside: 102400 kbytes in 3.354742 sec =3D 30524 kbytes/sec | |=3D=3D=3D=3D=3D=3D=3D=3D=3D | |/dev/ad1 |=09512 =09# sectorsize |=0980060424192 =09# mediasize in bytes (75G) |=09156368016 =09# mediasize in sectors |=09155127 =09# Cylinders according to firmware. |=0916 =09# Heads according to firmware. |=0963 =09# Sectors according to firmware. | |Seek times: |=09Full stroke:=09 250 iter in 5.431290 sec =3D 21.725 msec |=09Half stroke:=09 250 iter in 4.111275 sec =3D 16.445 msec |=09Quarter stroke:=09 500 iter in 6.282551 sec =3D 12.565 msec |=09Short forward:=09 400 iter in 1.741538 sec =3D 4.354 msec |=09Short backward:=09 400 iter in 3.285028 sec =3D 8.213 msec |=09Seq outer:=09 2048 iter in 0.259503 sec =3D 0.127 msec |=09Seq inner:=09 2048 iter in 0.258212 sec =3D 0.126 msec |Transfer rates: |=09outside: 102400 kbytes in 1.720602 sec =3D 59514 kbytes/sec |=09middle: 102400 kbytes in 1.998063 sec =3D 51250 kbytes/sec |=09inside: 102400 kbytes in 3.235904 sec =3D 31645 kbytes/sec | | |- Marcelo |
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