* SATA Performance
@ 2004-10-08 11:35 Sebastian Slota
2004-10-08 14:48 ` Jeff Garzik
0 siblings, 1 reply; 2+ messages in thread
From: Sebastian Slota @ 2004-10-08 11:35 UTC (permalink / raw)
To: linux-raid
Hello,
After I've updated my system and installed everything anew I experience a
really low IDE Performance.
Here some data:
hdparm -t /dev/sda
/dev/sda:
Timing buffered disk reads: 44 MB in 3.09 seconds = 14.24 MB/sec
hdparm -t /dev/md0
/dev/md0:
Timing buffered disk reads: 116 MB in 3.02 seconds = 38.47 MB/sec
Any Idea whats wrong?
I read this year there were problems with seagate HD and there would be a
patch against corrupting data....
When is it intended to rise the performance? I remember from 2.4 kernel that
the HD's were working with average 50MB/s each!
Here is my dmesg (all ide relevant data)
dmesg:
libata version 1.02 loaded.
sata_sil version 0.54
ACPI: PCI interrupt 0000:03:03.0[A] -> GSI 19 (level, low) -> IRQ 19
ata1: SATA max UDMA/100 cmd 0xF8B09080 ctl 0xF8B0908A bmdma 0xF8B09000 irq 19
ata2: SATA max UDMA/100 cmd 0xF8B090C0 ctl 0xF8B090CA bmdma 0xF8B09008 irq 19
ata3: SATA max UDMA/100 cmd 0xF8B09280 ctl 0xF8B0928A bmdma 0xF8B09200 irq 19
ata4: SATA max UDMA/100 cmd 0xF8B092C0 ctl 0xF8B092CA bmdma 0xF8B09208 irq 19
ata1: dev 0 cfg 49:2f00 82:346b 83:7d01 84:4003 85:3469 86:3c01 87:4003
88:207f
ata1: dev 0 ATA, max UDMA/133, 312581808 sectors: lba48
ata1(0): applying Seagate errata fix
ata1: dev 0 configured for UDMA/100
scsi0 : sata_sil
ata2: dev 0 cfg 49:2f00 82:346b 83:7d01 84:4003 85:3469 86:3c01 87:4003
88:207f
ata2: dev 0 ATA, max UDMA/133, 312581808 sectors: lba48
ata2(0): applying Seagate errata fix
ata2: dev 0 configured for UDMA/100
scsi1 : sata_sil
ata3: dev 0 cfg 49:2f00 82:346b 83:7d01 84:4003 85:3469 86:3c01 87:4003
88:207f
ata3: dev 0 ATA, max UDMA/133, 312581808 sectors: lba48
ata3(0): applying Seagate errata fix
ata3: dev 0 configured for UDMA/100
scsi2 : sata_sil
ata4: dev 0 cfg 49:2f00 82:346b 83:7d01 84:4003 85:3469 86:3c01 87:4003
88:207f
ata4: dev 0 ATA, max UDMA/133, 312581808 sectors: lba48
ata4(0): applying Seagate errata fix
ata4: dev 0 configured for UDMA/100
scsi3 : sata_sil
Vendor: ATA Model: ST3160023AS Rev: 3.05
Type: Direct-Access ANSI SCSI revision: 05
SCSI device sda: 312581808 512-byte hdwr sectors (160042 MB)
SCSI device sda: drive cache: write back
sda: sda1 sda2
Attached scsi disk sda at scsi0, channel 0, id 0, lun 0
Vendor: ATA Model: ST3160023AS Rev: 3.05
Type: Direct-Access ANSI SCSI revision: 05
SCSI device sdb: 312581808 512-byte hdwr sectors (160042 MB)
SCSI device sdb: drive cache: write back
sdb: sdb1 sdb2
Attached scsi disk sdb at scsi1, channel 0, id 0, lun 0
Vendor: ATA Model: ST3160023AS Rev: 3.05
Type: Direct-Access ANSI SCSI revision: 05
SCSI device sdc: 312581808 512-byte hdwr sectors (160042 MB)
SCSI device sdc: drive cache: write back
sdc: sdc1 sdc2
Attached scsi disk sdc at scsi2, channel 0, id 0, lun 0
Vendor: ATA Model: ST3160023AS Rev: 3.05
Type: Direct-Access ANSI SCSI revision: 05
SCSI device sdd: 312581808 512-byte hdwr sectors (160042 MB)
SCSI device sdd: drive cache: write back
sdd: sdd1
Attached scsi disk sdd at scsi3, channel 0, id 0, lun 0
md: md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27
raid5: automatically using best checksumming function: pIII_sse
pIII_sse : 3920.000 MB/sec
raid5: using function: pIII_sse (3920.000 MB/sec)
md: raid5 personality registered as nr 4
ReiserFS: hda5: found reiserfs format "3.6" with standard journal
ReiserFS: hda5: using ordered data mode
ReiserFS: hda5: journal params: device hda5, size 8192, journal first block
18,
max trans len 1024, max batch 900, max commit age 30, max trans age 30
ReiserFS: hda5: checking transaction log (hda5)
ReiserFS: hda5: Using r5 hash to sort names
Freeing unused kernel memory: 156k freed
md: raidstart(pid 353) used deprecated START_ARRAY ioctl. This will not be
suppo
rted beyond 2.6
md: autorun ...
md: considering sdc2 ...
md: adding sdc2 ...
md: adding sdb2 ...
md: adding sda2 ...
md: created md0
md: bind<sda2>
md: bind<sdb2>
md: bind<sdc2>
md: running: <sdc2><sdb2><sda2>
raid5: device sdc2 operational as raid disk 2
raid5: device sdb2 operational as raid disk 1
raid5: device sda2 operational as raid disk 0
raid5: allocated 3155kB for md0
raid5: raid level 5 set md0 active with 3 out of 3 devices, algorithm 2
RAID5 conf printout:
--- rd:3 wd:3 fd:0
disk 0, o:1, dev:sda2
disk 1, o:1, dev:sdb2
disk 2, o:1, dev:sdc2
md: ... autorun DONE.
ReiserFS: md0: found reiserfs format "3.6" with standard journal
ReiserFS: md0: using ordered data mode
ReiserFS: md0: journal params: device md0, size 8192, journal first block 18,
ma
x trans len 1024, max batch 900, max commit age 30, max trans age 30
ReiserFS: md0: checking transaction log (md0)
ReiserFS: md0: Using r5 hash to sort names
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: SATA Performance
2004-10-08 11:35 SATA Performance Sebastian Slota
@ 2004-10-08 14:48 ` Jeff Garzik
0 siblings, 0 replies; 2+ messages in thread
From: Jeff Garzik @ 2004-10-08 14:48 UTC (permalink / raw)
To: Sebastian Slota; +Cc: linux-raid
Sebastian Slota wrote:
> libata version 1.02 loaded.
> sata_sil version 0.54
> ACPI: PCI interrupt 0000:03:03.0[A] -> GSI 19 (level, low) -> IRQ 19
> ata1: SATA max UDMA/100 cmd 0xF8B09080 ctl 0xF8B0908A bmdma 0xF8B09000 irq 19
> ata2: SATA max UDMA/100 cmd 0xF8B090C0 ctl 0xF8B090CA bmdma 0xF8B09008 irq 19
> ata3: SATA max UDMA/100 cmd 0xF8B09280 ctl 0xF8B0928A bmdma 0xF8B09200 irq 19
> ata4: SATA max UDMA/100 cmd 0xF8B092C0 ctl 0xF8B092CA bmdma 0xF8B09208 irq 19
> ata1: dev 0 cfg 49:2f00 82:346b 83:7d01 84:4003 85:3469 86:3c01 87:4003
> 88:207f
> ata1: dev 0 ATA, max UDMA/133, 312581808 sectors: lba48
> ata1(0): applying Seagate errata fix
> ata1: dev 0 configured for UDMA/100
> scsi0 : sata_sil
> ata2: dev 0 cfg 49:2f00 82:346b 83:7d01 84:4003 85:3469 86:3c01 87:4003
> 88:207f
> ata2: dev 0 ATA, max UDMA/133, 312581808 sectors: lba48
> ata2(0): applying Seagate errata fix
> ata2: dev 0 configured for UDMA/100
> scsi1 : sata_sil
> ata3: dev 0 cfg 49:2f00 82:346b 83:7d01 84:4003 85:3469 86:3c01 87:4003
> 88:207f
> ata3: dev 0 ATA, max UDMA/133, 312581808 sectors: lba48
> ata3(0): applying Seagate errata fix
> ata3: dev 0 configured for UDMA/100
> scsi2 : sata_sil
> ata4: dev 0 cfg 49:2f00 82:346b 83:7d01 84:4003 85:3469 86:3c01 87:4003
> 88:207f
> ata4: dev 0 ATA, max UDMA/133, 312581808 sectors: lba48
> ata4(0): applying Seagate errata fix
> ata4: dev 0 configured for UDMA/100
The "applying Seagate errata fix" locks each request to a small size,
which kills performance basically.
Jeff
^ permalink raw reply [flat|nested] 2+ messages in thread
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