Extremely low disk performance on K7S5A Pro

Extremely low disk performance on K7S5A Pro

[Andreas Schwarz]

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):

# hdparm -v -i /dev/hda                                                         
/dev/hda:                                                                       
 multcount    = 16 (on)                                                         
 IO_support   =  3 (32-bit w/sync)                                              
 unmaskirq    =  1 (on)                                                         
 using_dma    =  1 (on)                                                         
 keepsettings =  0 (off)                                                        
 readonly     =  0 (off)                                                        
 readahead    = 256 (on)                                                        
 geometry     = 65535/16/63, sectors = 117231408, start = 0                     
                                                                                
 Model=ST360021A, FwRev=3.10, SerialNo=3HR0E280                                 
 Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }           
 RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
 BuffType=unknown, BuffSize=2048kB, MaxMultSect=16, MultSect=16                 
 CurCHS=4047/16/255, CurSects=16511760, LBA=yes, LBAsects=117231408             
 IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}               
 PIO modes:  pio0 pio1 pio2 pio3 pio4                                           
 DMA modes:  mdma0 mdma1 mdma2                                                  
 UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5                               
 AdvancedPM=no WriteCache=enabled                                               
 Drive conforms to: device does not report version:

Any hints how this problem could be solved?

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Re: Extremely low disk performance on K7S5A Pro

[Lionel Bouton]

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 ?

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

Could you send us :
- the exact kernel version,
- your kernel compilation config file,
- any kernel parameters provided,
- the content of /var/log/dmesg,
- the output of `lspci -vvxxx`,
- the ouput of `cat /proc/ide/sis`

Best regards,

-- 
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Re: Extremely low disk performance on K7S5A Pro

[Andreas Schwarz]

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

Re: Extremely low disk performance on K7S5A Pro

[Daniel Egger]

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Am Mon, den 06.10.2003 schrieb Andreas Schwarz um 22:38:

> >># 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

Eek, thanks to you I just figured out that one of my fileserver
harddrives has degraded its connection settings. After reactivating DMA
though I have the usual speeds also on a K7S5A:

egger@karin:~$ sudo hdparm -tT /dev/hdc
 
/dev/hdc:
 Timing buffer-cache reads:   800 MB in  2.00 seconds = 400.00 MB/sec
 Timing buffered disk reads:  120 MB in  3.01 seconds =  39.87 MB/sec

egger@karin:~$ sudo hdparm -tT /dev/hda
 
/dev/hda:
 Timing buffer-cache reads:   800 MB in  2.00 seconds = 400.00 MB/sec
 Timing buffered disk reads:   82 MB in  3.00 seconds =  27.33 MB/sec

-- 
Servus,
       Daniel

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Re: Extremely low disk performance on K7S5A Pro

[Andreas Schwarz]

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* !

I found the source of the problem: I was using athcool to enable the "bus
disconnect when STPGNT detected" bit on startup. That didn't cause any
problems with my old board (Abit KT7), but the K7S5A seems to be
allergic to it. Sorry if I wasted your time!

Andreas