ok solved my pb,
I have added on GENERIC amd64 kernel : (UP/MP)
  ixpide* at pci? dev ? function ? # ATI IXP IDE controllers
already exist on GENERIC i386 kernel
and perf IS VERY GOOD now ! (x10!)
maybe another ide chipset is missing ...
Best Regards
Rmkml


On Tue, 20 Jun 2006, rmkml wrote:

> Date: Tue, 20 Jun 2006 22:31:09 +0200 (CEST)
> From: rmkml <rmkml@free.fr>
> To: port-amd64@NetBSD.org
> Subject: ide disk performance question on amd64 port
> 
> Hi,
> my test is very simple:
> 1) boot on cdrom netbsd v3 amd64,
>  exit install and launch shell :
>  mount /dev/wd0a /mnt && cd /mnt
>  dd if=/dev/zero of=writefile bs=16k count=16k
>   29818880 bytes transferred in 24.318 secs (1226206 bytes/sec)
>  rm writefile
>  dd if=/dev/zero of=writefile bs=64k count=64k
>   17170432 bytes transferred in 11.307 secs (1518566 bytes/sec)
>
> 2) boot on cdrom netbsd v3 i386,
>  exit install and launch shell :
>  mount /dev/wd0a /mnt && cd /mnt
>  dd if=/dev/zero of=writefile bs=16k count=16k
>   268435456 bytes transferred in 4.085 secs (65712473 bytes/sec)
>  rm writefile
>  dd if=/dev/zero of=writefile bs=64k count=64k
>   4294967296 bytes transferred in 71.731 secs (59876027 bytes/sec)
>
> i386 have 10x perf !
>
> same disk, just reboot on cdrom amd64/i386 ...
>
> anyone have same pb ?
>
> dmesg amd64 :
> wd0 at atabus4 drive 0: <ST3200021A>
> wd0: drive supports 16-sector PIO transfers, LBA48 addressing
> wd0: 176 GB, 366247 cyl, 16 head, 63 sec, 512 bytes/sect x 369177306 sectors
> wd0: 32-bit data port
> wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
>
> dmesg i386 :
> wd0 at atabus4 drive 0: <ST3200021A>
> wd0: drive supports 16-sector PIO transfers, LBA48 addressing
> wd0: 176 GB, 366247 cyl, 16 head, 63 sec, 512 bytes/sect x 369177306 sectors
> wd0: 32-bit data port
> wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
> wd0(ixpide0:0:0): using PIO mode 4, Ultra-DMA mode 5 (Ultra/100) (using DMA)
>
> dmesg diff amd64/i386 missing last line on amd64 ! (?)
> {I have rebooted 10x and same missing last line on amd64}
>
> Best Regards
> Rmkml
>