Re: ICH5 with 2.6.1 very slow

["Kyle" <kyle@southa.com>]

Today I tried to boot with redhat kernel 2.4.20-24.9smp, much better result:

/dev/hda:
 Timing buffer-cache reads:   128 MB in  0.14 seconds =914.29 MB/sec
 Timing buffered disk reads:  64 MB in  1.67 seconds = 38.32 MB/sec

Really strange that /dev/hdc is even faster!
/dev/hdc:
 Timing buffer-cache reads:   128 MB in  0.13 seconds =984.62 MB/sec
 Timing buffered disk reads:  64 MB in  1.17 seconds = 54.70 MB/sec

I ran hdparm 5 times at both harddisk and take the fastest result.
/dev/hda and /dev/hdc are both WD 250GB / 8M, same model.

at kernel 2.6, I got same performance for  /dev/hda and /dev/hdc, around
~28MB/sec. 50%-100% slower then kernel 2.4

/proc/interrupt:

           CPU0       CPU1
  0:    8014632          0    IO-APIC-edge  timer
  1:       2273          0    IO-APIC-edge  i8042
  2:          0          0          XT-PIC  cascade
  8:          1          0    IO-APIC-edge  rtc
  9:          0          0   IO-APIC-level  acpi
 14:     167888          0    IO-APIC-edge  ide0
 15:     199399          0    IO-APIC-edge  ide1
 20:    2186070          0   IO-APIC-level  eth1
NMI:          0          0
LOC:    8014888    8014887
ERR:          0
MIS:          0

I tried to update my mobo BIOS (Intel D865GLC), remove one of the NIC (I
have two), disable serial, parallel, USB etc just leave IDE and built-in
display, no help. I have NO IDE cdrom and floppy, only 2 harddisk, 1 CPU, 4
x 512M DDR and a mobo at my machine.

CONFIG_IDE=y
CONFIG_BLK_DEV_IDE=y
CONFIG_BLK_DEV_IDEDISK=y
CONFIG_IDEDISK_MULTI_MODE=y
CONFIG_BLK_DEV_IDECD=m
CONFIG_BLK_DEV_IDESCSI=m
CONFIG_BLK_DEV_IDEPNP=y
CONFIG_BLK_DEV_IDEPCI=y
CONFIG_IDEPCI_SHARE_IRQ=y
CONFIG_BLK_DEV_GENERIC=y
CONFIG_BLK_DEV_IDEDMA_PCI=y
CONFIG_IDEDMA_PCI_AUTO=y
CONFIG_BLK_DEV_ADMA=y
CONFIG_BLK_DEV_PIIX=y
CONFIG_BLK_DEV_IDEDMA=y
CONFIG_IDEDMA_AUTO=y

Kyle



----- Original Message ----- 
From: "Bas Mevissen" <ml@basmevissen.nl>
To: "Kyle" <kyle@southa.com>
Cc: <linux-kernel@vger.kernel.org>
Sent: Friday, February 06, 2004 6:10 PM
Subject: Re: ICH5 with 2.6.1 very slow


> Kyle wrote:
>
> > hdparm /dev/hda
> > /dev/hda:
> > multcount = 16 (on)
> > IO_support = 1 (32-bit)
> > unmaskirq = 1 (on)
> > using_dma = 1 (on)
> > keepsettings = 0 (off)
> > readonly = 0 (off)
> > readahead = 256 (on)
> > geometry = 30401/255/63, sectors = 488397168, start = 0
> >
> > tried with hdparm -a8192 /dev/hda, not much different
> > /dev/hdc same as /dev/hda
> >
>
> Looks fine. That's strange. Maybe reboot the system and check
> /proc/interrupts to see if none of them is excessive.
>
> What's your .config? Try with as less as possible IDE stuff enabled.
>
> Bas.
>
>
>