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SubjectRe: [2.6] system is very slow during disk access
Date
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Hash: SHA1

On Thursday 07 August 2003 00:04, Andrew Morton wrote:
> Please boot the 2.6 machine with "profile=1" on the kernel boot command
> line.
>
> start the `dd', do a `readprofile -r', wait ten seconds, do
>
> readprofile -m /wherever/System.map
>
> then post the results.

I've done this twice and appended the results to this mail.



But I've captured a few other interesting things in the syslog.
After doing a
$ hdparm -c1 -u1 -d1 -X69 /dev/hda
I saw this in my syslog:

Aug 7 00:32:05 lfs kernel: blk: queue c049195c, I/O limit 4095Mb (mask 0xffffffff)
Aug 7 00:32:05 lfs kernel: hda: Speed warnings UDMA 3/4/5 is not functional.

The onboard IDE controller is a UDMA-100 controller
and the disks do run in this mode, too.

- --
Regards Michael Buesch [ http://www.8ung.at/tuxsoft ]
Penguin on this machine: Linux 2.6.0-test2 - i386

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14 free_thrown 0,1346
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81 _make_cpu_key 0,4378
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77 reiserfs_get_block 0,0154
27 inode2sd 0,1812
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1 clear_all_dirty_bits 0,0278
72 wait_tb_buffers_until_unlocked 0,0829
10 fix_nodes 0,0093
54 unfix_nodes 0,1538
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1 leaf_define_dest_src_infos 0,0024
464 leaf_paste_in_buffer 0,6563
1 internal_insert_childs 0,0021
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7 pathrelse_and_restore 0,0897
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78 is_internal 0,5612
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20 init_tb_struct 0,2532
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1 B_IS_IN_TREE 0,0476
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2 decrement_bcount 0,0370
1 reiserfs_check_lock_depth 0,2000
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63 do_journal_begin_r 0,0969
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2 journal_prepare 0,2857
64 journal_mark_dirty 0,0872
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62 check_journal_end 0,0960
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24 reiserfs_restore_prepared_buffer 0,7742
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37 do_journal_end 0,0128
2 sd_is_left_mergeable 0,2857
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1 cap_vm_enough_memory 0,0057
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2 __clear_user 0,0645
2 __copy_user_intel 0,0116
4 __copy_to_user_ll 0,0385
266 __copy_from_user_ll 2,5577
28 read_zero 0,0576
1 tty_poll 0,0085
1 normal_poll 0,0031
1 add_entropy_words 0,0060
2 con_chars_in_buffer 0,2857
46 blk_rq_map_sg 0,1437
1 get_request 0,0015
67 __make_request 0,0529
12 generic_make_request 0,0271
1 submit_bio 0,0094
1 as_set_request 0,0093
2 get_stats 0,0165
98 ide_end_request 0,2961
17 ide_do_request 0,0159
6 ide_intr 0,0143
41 ide_inb 3,4167
2 ide_outb 0,1538
106 ide_outbsync 8,1538
3 ide_outsl 0,1667
18 ide_execute_command 0,1011
1 __ide_do_rw_disk 0,0005
2 ide_dma_intr 0,0108
3 ide_build_dmatable 0,0077
1 i8042_interrupt 0,0018
17 raid0_make_request 0,0471
1 sock_sendmsg 0,0057
1 sock_poll 0,0208
1 dev_seq_start 0,0075
2 unix_peer_get 0,0370
4 unix_poll 0,0265
8982 gesamt 0,0038
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