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SubjectRe: ICH5 with 2.6.1 very slow
Date
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.
>
>
>

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