On Sun, 26 Jan 2003, Tom Winkler wrote:
> I've asked this question in several Newsgroups but nobody was really
> able to answer it. That's why I decided to send it to LKM. Please CC
> me on your replies. Thanks!
>
> I've got a question related to ide performance.
> First of all my hardware:
> Mainboard: ASUS P4PE (using onboard IDE but not S-ATA)
> http://www.asus.com/products/mb/socket478/p4pe/overview.htm
> Harddisk: Western Digital WD800JB
> http://www.westerndigital.com/products/products.asp?DriveID=32
>
>
> Now about the current performance (on 2.4.20 and almost the same on 2.5.56):
>
> tom@storm:~$ sudo hdparm -tT /dev/hda
> /dev/hda:
> Timing buffer-cache reads: 128 MB in 0.27 seconds =474.07 MB/sec
> Timing buffered disk reads: 64 MB in 3.05 seconds = 20.98 MB/sec
>
> The cache read time is pretty ok but the disk read time is below of
> what I'd have expected. My expectations would have been around 40MB/sec.
>
> Am I wrong with my expectations for this setup?
> I'd really be interested in any suggestion about how I could omptimize
> the system.
I won't try to guess why my setup seems faster, but here's some info:
Script started on Mon Jan 27 16:05:52 2003
bash-2.05b# uname -a
Linux gaimboi.tmr.com 2.4.18-18.8.0 #1 Thu Nov 14 00:10:29 EST 2002 i686 i686 i386 GNU/Linux
bash-2.05b# \
> for disk in hda hdc; do
> cat /proc/ide/$disk/model
> hdparm -I /dev/$disk
> hdparm -Tt /dev/$disk
> cat /proc/ide/$disk/settings
> done
WDC WD200EB-00CSF0
/dev/hda:
ATA device, with non-removable media
Model Number: WDC WD200EB-00CSF0
Serial Number: WD-WTAAV3724404
Firmware Revision: 04.01B04
Standards:
Supported: 5 4 3 2
Likely used: 6
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
--
CHS current addressable sectors: 16514064
LBA user addressable sectors: 39102336
device size with M = 1024*1024: 19092 MBytes
device size with M = 1000*1000: 20020 MBytes (20 GB)
Capabilities:
LBA, IORDY(can be disabled)
bytes avail on r/w long: 40 Queue depth: 1
Standby timer values: spec'd by Standard, with device specific minimum
R/W multiple sector transfer: Max = 16 Current = 16
Recommended acoustic management value: 128, current value: 254
DMA: mdma0 mdma1 mdma2 udma0 udma1 *udma2 udma3 udma4 udma5
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* READ BUFFER cmd
* WRITE BUFFER cmd
* Host Protected Area feature set
* Look-ahead
* Write cache
* Power Management feature set
Security Mode feature set
SMART feature set
Automatic Acoustic Management feature set
SET MAX security extension
* DOWNLOAD MICROCODE cmd
Security:
supported
not enabled
not locked
not frozen
not expired: security count
not supported: enhanced erase
HW reset results:
CBLID- above Vih
Device num = 0 determined by the jumper
Checksum: correct
/dev/hda:
Timing buffer-cache reads: 128 MB in 0.26 seconds =492.78 MB/sec
Timing buffered disk reads: 64 MB in 2.26 seconds = 28.30 MB/sec
name value min max mode
---- ----- --- --- ----
acoustic 0 0 254 rw
address 0 0 2 rw
bios_cyl 2434 0 65535 rw
bios_head 255 0 255 rw
bios_sect 63 0 63 rw
breada_readahead 8 0 255 rw
bswap 0 0 1 r
current_speed 66 0 69 rw
failures 0 0 65535 rw
file_readahead 508 0 16384 rw
ide_scsi 0 0 1 rw
init_speed 66 0 69 rw
io_32bit 0 0 3 rw
keepsettings 0 0 1 rw
lun 0 0 7 rw
max_failures 1 0 65535 rw
max_kb_per_request 128 1 255 rw
multcount 16 0 16 rw
nice1 1 0 1 rw
nowerr 0 0 1 rw
number 0 0 3 rw
pio_mode write-only 0 255 w
slow 0 0 1 rw
unmaskirq 0 0 1 rw
using_dma 1 0 1 rw
wcache 0 0 1 rw
ST360021A
/dev/hdc:
ATA device, with non-removable media
Model Number: ST360021A
Serial Number: 3HR1C0F1
Firmware Revision: 3.19
Standards:
Supported: 5 4 3 2
Likely used: 6
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
--
CHS current addressable sectors: 16514064
LBA user addressable sectors: 117231408
device size with M = 1024*1024: 57241 MBytes
device size with M = 1000*1000: 60022 MBytes (60 GB)
Capabilities:
LBA, IORDY(can be disabled)
bytes avail on r/w long: 4 Queue depth: 1
Standby timer values: spec'd by Standard
R/W multiple sector transfer: Max = 16 Current = 16
Recommended acoustic management value: 128, current value: 128
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=240ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* READ BUFFER cmd
* WRITE BUFFER cmd
* Host Protected Area feature set
* Look-ahead
* Write cache
* Power Management feature set
Security Mode feature set
SMART feature set
Device Configuration Overlay feature set
* Automatic Acoustic Management feature set
SET MAX security extension
* DOWNLOAD MICROCODE cmd
Security:
Master password revision code = 65534
supported
not enabled
not locked
not frozen
not expired: security count
not supported: enhanced erase
HW reset results:
CBLID- above Vih
Device num = 1
Checksum: correct
/dev/hdc:
Timing buffer-cache reads: 128 MB in 0.26 seconds =492.78 MB/sec
Timing buffered disk reads: 64 MB in 1.58 seconds = 40.50 MB/sec
name value min max mode
---- ----- --- --- ----
acoustic 0 0 254 rw
address 0 0 2 rw
bios_cyl 116301 0 65535 rw
bios_head 16 0 255 rw
bios_sect 63 0 63 rw
breada_readahead 8 0 255 rw
bswap 0 0 1 r
current_speed 69 0 69 rw
failures 0 0 65535 rw
file_readahead 508 0 16384 rw
ide_scsi 0 0 1 rw
init_speed 69 0 69 rw
io_32bit 0 0 3 rw
keepsettings 0 0 1 rw
lun 0 0 7 rw
max_failures 1 0 65535 rw
max_kb_per_request 128 1 255 rw
multcount 16 0 16 rw
nice1 1 0 1 rw
nowerr 0 0 1 rw
number 2 0 3 rw
pio_mode write-only 0 255 w
slow 0 0 1 rw
unmaskirq 0 0 1 rw
using_dma 1 0 1 rw
wcache 0 0 1 rw
bash-2.05b# exit
Script done on Mon Jan 27 16:18:40 2003
> And here's some more information about the current settings (let me
> know if you need anything else):
>
> tom@storm:~$ sudo hdparm /dev/hda
> /dev/hda:
> multcount = 16 (on)
> I/O support = 3 (32-bit w/sync)
> unmaskirq = 1 (on)
> using_dma = 1 (on)
> keepsettings = 0 (off)
> nowerr = 0 (off)
> readonly = 0 (off)
> readahead = 255 (on)
> geometry = 9729/255/63, sectors = 156301488, start = 0
> busstate = 1 (on)
>
>
> tom@storm:~$ sudo cat /proc/ide/hda/settings
> name value min max mode
> ---- ----- --- --- ----
> acoustic 0 0 254 rw
> address 0 0 2 rw
> bios_cyl 9729 0 65535 rw
> bios_head 255 0 255 rw
> bios_sect 63 0 63 rw
> breada_readahead 255 0 255 rw
> bswap 0 0 1 r
> current_speed 69 0 69 rw
> failures 0 0 65535 rw
> file_readahead 16384 0 16384 rw
> ide_scsi 0 0 1 rw
> init_speed 69 0 69 rw
> io_32bit 3 0 3 rw
> keepsettings 0 0 1 rw
> lun 0 0 7 rw
> max_failures 1 0 65535 rw
> max_kb_per_request 255 1 255 rw
> multcount 16 0 16 rw
> nice1 1 0 1 rw
> nowerr 0 0 1 rw
> number 0 0 3 rw
> pio_mode write-only 0 255 w
> slow 0 0 1 rw
> unmaskirq 1 0 1 rw
> using_dma 1 0 1 rw
> wcache 0 0 1 rw
>
>
> tom@storm:~$ sudo hdparm -I /dev/hda
> /dev/hda:
> non-removable ATA device, with non-removable media
> Model Number: WDC WD800JB-00CRA1
> Serial Number: WD-WMA8E3710419
> Firmware Revision: 17.07W17
> Standards:
> Supported: 1 2 3 4 5
> Likely used: 5
> Configuration:
> Logical max current
> cylinders 16383 16383
> heads 16 16
> sectors/track 63 63
> bytes/track: 57600 (obsolete)
> bytes/sector: 600 (obsolete)
> current sector capacity: 16514064
> LBA user addressable sectors = 156301488
> Capabilities:
> LBA, IORDY(can be disabled)
> Buffer size: 8192.0kB ECC bytes: 40 Queue depth: 1
> Standby timer values: spec'd by standard, with device specific minimum
> r/w multiple sector transfer: Max = 16 Current = 16
> DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
> Cycle time: min=120ns recommended=120ns
> PIO: pio0 pio1 pio2 pio3 pio4
> Cycle time: no flow control=120ns IORDY flow control=120ns
> Commands/features:
> Enabled Supported:
> * READ BUFFER cmd
> * WRITE BUFFER cmd
> * Host Protected Area feature set
> * look-ahead
> * write cache
> * Power Management feature set
> Security Mode feature set
> SMART feature set
> SET MAX security extension
> * DOWNLOAD MICROCODE cmd
> Security:
> supported
> not enabled
> not locked
> not frozen
> not expired: security count
> not supported: enhanced erase
> HW reset results:
> CBLID- above Vih
> Device num = 0 determined by the jumper
> Checksum: correct
>
>
>
> A full dmesg dump can be found at http://www.wnk.at/files/dmesg.txt
-- bill davidsen <davidsen@tmr.com> CTO, TMR Associates, Inc Doing interesting things with little computers since 1979.- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Fri Jan 31 2003 - 22:00:17 EST