Public bug reported:
Binary package hint: linux-image-2.6.24-16-generic
I see very bad I/O performance when doing a large copy of small files on my
laptop.
I'm using dm-crypt for my root filesystem and am using dm-crypt on my external
USB HDD. I try to copy around 16 GB of data from my root filesystem to the
external USB HDD and the performance is very bad. I eventually end up getting a
speed of 50 kB/S. The system is barely responsive.
>From dmesg, these are some very interesting messages I see.....
[12485.056379] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
[12485.056729] ata2.00: cmd a0/00:00:00:0c:00/00:00:00:00:00/a0 tag 0 pio 12 in
[12485.056761] cdb 43 00 00 00 00 00 00 00 0c 00 00 00 00 00 00 00
[12485.056823] res 51/20:03:00:0c:00/00:00:00:00:00/a0 Emask 0x3 (HSM
violation)
[12485.056919] ata2.00: status: { DRDY ERR }
[12485.057436] ata2: soft resetting link
[12487.704204] ata2.00: configured for UDMA/33
[12487.704652] ata2: EH complete
[13077.097783] CPU0 attaching NULL sched-domain.
[13077.097911] CPU1 attaching NULL sched-domain.
[13077.122603] CPU0 attaching sched-domain:
[13077.122698] domain 0: span 03
[13077.122731] groups: 01 02
[13077.122825] domain 1: span 03
[13077.122858] groups: 03
[13077.122921] CPU1 attaching sched-domain:
[13077.122954] domain 0: span 03
[13077.122987] groups: 02 01
[13077.123051] domain 1: span 03
[13077.123113] groups: 03
[13257.567642] CPU0 attaching NULL sched-domain.
[13257.567768] CPU1 attaching NULL sched-domain.
[13257.817747] CPU0 attaching sched-domain:
[13257.818066] domain 0: span 03
[13257.818100] groups: 01 02
[13257.818194] CPU1 attaching sched-domain:
[13257.818227] domain 0: span 03
[13257.818260] groups: 02 01
[16918.726319] CPU0 attaching NULL sched-domain.
[16918.726478] CPU1 attaching NULL sched-domain.
[16918.742973] CPU0 attaching sched-domain:
[16918.743068] domain 0: span 03
[16918.743131] groups: 01 02
[16918.743196] domain 1: span 03
[16918.743258] groups: 03
[16918.743322] CPU1 attaching sched-domain:
[16918.743354] domain 0: span 03
[16918.743387] groups: 02 01
[16918.743481] domain 1: span 03
[16918.743513] groups: 03
[17708.858904] CPU0 attaching NULL sched-domain.
[17708.859125] CPU1 attaching NULL sched-domain.
[17708.884150] CPU0 attaching sched-domain:
[17708.884278] domain 0: span 03
[17708.884343] groups: 01 02
[17708.884469] CPU1 attaching sched-domain:
[17708.884501] domain 0: span 03
[17708.884534] groups: 02 01
[18584.899435] CPU0 attaching NULL sched-domain.
[18584.899593] CPU1 attaching NULL sched-domain.
[18584.918651] CPU0 attaching sched-domain:
[18584.918747] domain 0: span 03
[18584.918810] groups: 01 02
[18584.918875] domain 1: span 03
[18584.918937] groups: 03
[18584.918971] CPU1 attaching sched-domain:
[18584.919033] domain 0: span 03
[18584.919065] groups: 02 01
[18584.919129] domain 1: span 03
[18584.919162] groups: 03
LSB Output
[EMAIL PROTECTED]:~$ lsb_release -rd
Description: Ubuntu 8.04
Release: 8.04
Kernel:
[EMAIL PROTECTED]:~$ uname -a
Linux learner 2.6.24-16-generic #1 SMP Thu Apr 10 13:23:42 UTC 2008 i686
GNU/Linux
Machine:
Dell XPS M1210
Proc 2.0Ghz
RAM: 2 GB
HDD: SATA 60 GB
Rest should be available from the dmesg file.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
--
very bad I/O performance with linux kernel in Hardy
https://bugs.launchpad.net/bugs/221437
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
