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SubjectRe: UDMA Support for ALI1543?
On Wed, 24 Feb 1999, Andrzej Krzysztofowicz wrote:

> > > Look at Andre's homepage:
> > >
> > > http://www.dyer.vanderbilt.edu/server/udma/
> >
> > I took a look at it and grabbed the patch, but I didn't see any reference
> > to the ALI 15xx series chips. The patch only appears to address ALI 14xx
> > series chips.
>
> The patch does nothing with ALI 14xx. It supports ALI 15xx called Aladdin.
> ALI 14xx is old and even does not support UDMA
> However the patch does almost nothing for you if your BIOS does set your
> chipset properly basing on CMOS settings...

I patched w/ 2.2.2-ac1 and your 2.2.2-uniorm ide patch and rebuilt the
kernel. When I boot, I get the following in dmesg;

ALI15X3: IDE controller on PCI bus 00 dev 78
ALI15X3: not 100% native mode: will probe irqs later
ALI15X3: enabled read of IDE channels state (en/dis-abled) Succeeded.
ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda:DMA, hdb:pio
ide1: BM-DMA at 0xf008-0xf00f, BIOS settings: hdc:pio, hdd:pio
hda: Maxtor 90576D4, ATA DISK drive
hdb: TOSHIBA CD-ROM XM-6402B, ATAPI CDROM drive
hdc: WDC AC21600H, ATA DISK drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: Maxtor 90576D4, 5495MB w/256kB Cache, CHS=700/255/63, (U)DMA
hdc: WDC AC21600H, 1549MB w/128kB Cache, CHS=3148/16/63, DMA
hdb: ATAPI 32X CD-ROM drive, 256kB Cache
Uniform CDROM driver Revision: 2.52

Here's my results using hdparm.

2.2.1-ac6 (Standard IDE Driver)

Timing buffered disk reads: 64 MB in 9.44 seconds = 6.78 MB/sec
Timing buffered disk reads: 64 MB in 9.43 seconds = 6.79 MB/sec
Timing buffered disk reads: 64 MB in 9.44 seconds = 6.78 MB/sec
Timing buffered disk reads: 64 MB in 9.51 seconds = 6.73 MB/sec
Timing buffered disk reads: 64 MB in 9.39 seconds = 6.82 MB/sec

2.2.2-ac1-uniform-ide

Timing buffered disk reads: 64 MB in 8.09 seconds = 7.91 MB/sec
Timing buffered disk reads: 64 MB in 8.13 seconds = 7.87 MB/sec
Timing buffered disk reads: 64 MB in 8.12 seconds = 7.88 MB/sec
Timing buffered disk reads: 64 MB in 8.33 seconds = 7.68 MB/sec
Timing buffered disk reads: 64 MB in 10.19 seconds = 6.28 MB/sec

So.. there is most definitly an improvement. Got any suggestions for a
better disk speed suite than "hdparm"?


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