Re: Extremely low disk performance on K7S5A Pro

[Andreas Schwarz <usenet@andreas-s.net>]

Lionel Bouton wrote:
> Andreas Schwarz said the following on 10/02/2003 05:47 PM:
>
>>Hi,
>>
>>since I replaced my Abit KT7 with an Elitegroup K7S5A Pro (SIS735), I've
>>got extremly low disk performance with every tested kernel version
>>(2.4.20, 2.6.0-test6-mm2):
>>
>># hdparm -tT /dev/hda                                                           
>>/dev/hda:                                                                       
>> Timing buffer-cache reads:   824 MB in  2.00 seconds = 411.65 MB/sec           
>> Timing buffered disk reads:   10 MB in  3.28 seconds =   3.05 MB/sec
>>                                                          ^^^^
>>
>>DMA, 32bit etc. is activated (hdparm -d1 -c3 -u1 /dev/hda):
>>
>>  
>>
>
> 3.05 MB is even less than what I'm used to see with most drives and *PIO 
> 4* !
>
> Is there any ide message in /var/log/messages ?

No, nothing at all.

> I see you use hdparm to setup the drive/controller settings. I advise 
> you to let the kernel autotune the transfer modes by itself.

That doesn't change anything.

> Could you send us :
> - the exact kernel version,

2.6.20-test6-mm2 (but 2.4.20 produces exactly the same result!)

> - your kernel compilation config file,

http://andreas-s.net/kernel/config.gz

> - any kernel parameters provided,

root=/dev/hda7 hdc=ide-scsi hdd=ide-scsi vga=792 noapic

> - the content of /var/log/dmesg,

http://andreas-s.net/kernel/dmesg.gz

> - the output of `lspci -vvxxx`,

http://andreas-s.net/kernel/lspci.gz

> - the ouput of `cat /proc/ide/sis`

http://andreas-s.net/kernel/sis.gz


-- 
AVR-Tutorial, über 350 Links
Forum für AVRGCC und MSPGCC
-> http://www.mikrocontroller.net