[reiserfs-list] Re: [OpenAFS-devel] more on the 2.2.18pre17 SMP cpu hog/etc.

[Nathan Neulinger]

Andi Kleen wrote:
> 
> [you didn't say it in the mail, but I'll guess you're using a reiserfs
> partition as a afs cache]

Yes. But am using it on my work machine (actually dozens of machines)
without any problems at all. But on my home machine, it crawls.

> Could you profile the kernel and see what is taking up the CPU ?
> (boot with profile=2 and read the profile log using readprofile afterwards)

After readprofile -r, I ran afsd, waited for it to finish it's startup,
and here's the result:

     4 startup_32                                 0.0244
     1 __switch_to                                0.0053
     1 do_signal                                  0.0014
     1 do_page_fault                              0.0010
     2 schedule                                   0.0021
     3 printk                                     0.0077
     1 do_anonymous_page                          0.0076
     1 filemap_nopage                             0.0012
     2 kmalloc                                    0.0050
     1 __get_free_pages                           0.0014
   193 find_buffer                                1.3403
    15 get_hash_table                             0.4167
    94 reiserfs_get_hash_table                    0.6912
     5 finish_log_block_io                        0.0154
    61 reiserfs_getblk                            0.1676
     4 fixup_reiserfs_buffers                     0.0303
     1 sys_select                                 0.0007
     1 d_lookup                                   0.0045
     1 grow_inodes                                0.0023
    40 decrement_counters_in_path                 0.5882
   664 search_by_key                              0.6081
     1 bin_search_in_dir_item                     0.0086
    44 search_by_objectid                         0.1236
    69 reiserfs_bread                             0.4539
     8 reiserfs_sync_block                        0.0435
     1 tcp_listen_poll                            0.0125
     1 ide_wait_stat                              0.0042
     2 ide_dmaproc                                0.0037
     2 do_rw_disk                                 0.0022
     1 check_tty_count                            0.0083
     1 write_chan                                 0.0018
     2 __generic_copy_to_user                     0.0312
     1 __generic_copy_from_user                   0.0156
  1229 total                                      0.0011

-- Nathan

------------------------------------------------------------
Nathan Neulinger                       EMail:  nneul@umr.edu
University of Missouri - Rolla         Phone: (573) 341-4841
CIS - Systems Programming                Fax: (573) 341-4216