Re: severe slowdown with 2.4 series w/heavy disk access

Guillaume Morin (guillaume@morinfr.org)
Wed, 26 Dec 2001 20:25:35 +0100


FYI,

I experience the same problem with recent kernels. I run 2.4.16. When I
copy a file from one hd to another, ls'ing a empty directory takes about
6-7 secs.

Disks are

/dev/hda:

non-removable ATA device, with non-removable media
Model Number: QUANTUM FIREBALLP LM15
Serial Number: 883011568812
Firmware Revision: A35.0700
Standards:
Used: ATA/ATAPI-5 T13 1321D revision 1
Supported: 1 2 3 4 5
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
bytes/track: 32256 (obsolete)
bytes/sector: 21298 (obsolete)
current sector capacity: 16514064
LBA user addressable sectors = 29336832
Capabilities:
LBA, IORDY(can be disabled)
Buffer size: 1900.0kB ECC bytes: 4 Queue depth: 1
Standby timer values: spec'd by Vendor, no device specific
minimum
r/w multiple sector transfer: Max = 16 Current = 0
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 *udma4
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:
Master password revision code = 65534
supported
not enabled
not locked
not frozen
not expired: security count
not supported: enhanced erase
12min for SECURITY ERASE UNIT.
HW reset results:
CBLID- above Vih
Device num = 0 determined by the jumper
Checksum: correct

/dev/hdd:

non-removable ATA device, with non-removable media
Model Number: WDC WD400BB-00CLB0
Serial Number: WD-WMAAN1229771
Firmware Revision: 05.04E05
Standards:
Supported: 1 2 3 4 5
Likely used: 5
Configuration:
Logical max current
cylinders 16383 17475
heads 16 15
sectors/track 63 63
bytes/track: 57600 (obsolete)
bytes/sector: 600 (obsolete)
current sector capacity: 16513875
LBA user addressable sectors = 78165360
Capabilities:
LBA, IORDY(can be disabled)
Buffer size: 2048.0kB 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 = 1 determined by the jumper
Checksum: correct

at boot :

ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: 29336832 sectors (15020 MB) w/1900KiB Cache, CHS=1826/255/63,
UDMA(66)
hdd: 78165360 sectors (40021 MB) w/2048KiB Cache, CHS=77545/16/63,
UDMA(33)

Let me know if you want me to test patches or provide more information.

Regards,

-- 
Guillaume Morin <guillaume@morinfr.org>

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