Home » Mailing list archives » linux-kernel » 2007 » August » 26

Problems with disc-performance and libata

!MAILaRCHIVE_VOTE_RePLACE
Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
[view in full thread]
From: Oliver Janscheidt <oliver.janscheidt@...>
To: <linux-kernel@...>
Subject: Problems with disc-performance and libata
Date: Sunday, August 26, 2007 - 4:08 pm

Hi,

I'm using a Lenovo Thinkpad with TOSHIBA MK1234GS HD and MATSHITA
DVD-RAM UJ-850 on 82801GBM/GHM (ICH7 Family) Serial ATA Storage
Controller IDE. The Kernel is a 2.6.22.1 from Kernel.org (with 2.6.23-rc1- 
and hdaps-queue-freezing-patch).

sudo hdparm -t /dev/scd0 gives 

Timing buffered disk reads:    2 MB in  4.47 seconds = 457.75 kB/sec

sudo hdparm -t /dev/sda gives

Timing buffered disk reads:  102 MB in  3.04 seconds =  33.51 MB/sec

which is a quite poor performance and makes any streaming impossible.
Obviously UDMA is working correctly as dmesg | grep UDMA says:

[   43.636590] ata1: SATA max UDMA/133 cmd 0xffffc20004612500 ctl
0x0000000000000000 bmdma 0x0000000000000000 irq 314
[   43.636595] ata2: SATA max UDMA/133 cmd 0xffffc20004612580 ctl
0x0000000000000000 bmdma 0x0000000000000000 irq 314
[   43.636599] ata3: SATA max UDMA/133 cmd 0xffffc20004612600 ctl
0x0000000000000000 bmdma 0x0000000000000000 irq 314
[   43.636603] ata4: SATA max UDMA/133 cmd 0xffffc20004612680 ctl
0x0000000000000000 bmdma 0x0000000000000000 irq 314
[   44.177980] ata1.00: ATA-7: TOSHIBA MK1234GSX, AH002E, max UDMA/100
[   44.179192] ata1.00: configured for UDMA/100
[   44.326918] ata5: PATA max UDMA/133 cmd 0x00000000000101f0 ctl
0x00000000000103f6 bmdma 0x0000000000011880 irq 14
[   44.326922] ata6: PATA max UDMA/133 cmd 0x0000000000010170 ctl
0x0000000000010376 bmdma 0x0000000000011888 irq 15
[   44.571970] ata5.00: ATAPI: MATSHITADVD-RAM UJ-850, RB01, max UDMA/33
[   44.738552] ata5.00: configured for UDMA/33
[    0.610332] ata5.00: configured for UDMA/33
[    0.750296] ata1.00: configured for UDMA/100

Is there any solution for that problem or at least a workaround?

I also tried to recompile the kernel as recommended in the official
libata-faq ( http://linux-ata.org/faq.html ) but the system stuck when
booting the root-partition. Booting with combined_mode=libata or
combined_mode=ide didn't affect the performance, too.  

Thanks in advance,

Oli

-
Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
Messages in current thread:
Problems with disc-performance and libata, Oliver Janscheidt, (Sun Aug 26, 4:08 pm)
Re: Problems with disc-performance and libata, Michal Piotrowski, (Sun Aug 26, 7:59 pm)
Re: Problems with disc-performance and libata, Oliver Janscheidt, (Mon Aug 27, 2:44 am)
Re: Problems with disc-performance and libata, Oliver Janscheidt, (Tue Aug 28, 2:44 am)