Re: 2.6.8.1-mm3

[Jesse Barnes]

On Friday, August 20, 2004 12:57 pm, Jesse Barnes wrote:
> I applied wli's per-cpu profiling patch, added some tweaks that he and I
> discussed on irc and things look pretty good.  We can now profile all 512
> CPUs in the system w/o livelocking :)
>
> Here's the output part way through a kernbench run:

In the interest of consistency with my last run and to see if marcelo and 
akpm's fixes made a difference, here's the top 30 profile hits:

[root@ascender root]# time readprofile -n -m System.map-2.6.8.1-mm3 | sort -nr 
| head -30
120535656 total                                     18.6877
53156327 ia64_pal_call_static                     276855.8698
52716600 default_idle                             137282.8125
6122150 ia64_save_scratch_fpregs                 95658.5938
6118803 ia64_load_scratch_fpregs                 95606.2969
1918154 ia64_spinlock_contention                 19980.7708
 92550 collate_per_cpu_profiles                 192.8125
 22281 rcu_check_quiescent_state                 58.0234
 19673 file_move                                 87.8259
 15470 file_kill                                 69.0625
 15417 clear_page                                96.3563
 14668 __d_lookup                                16.3705
 12638 clear_page_tables                          9.6326
 12616 copy_page                                 49.2812
 11772 atomic_dec_and_lock                       45.9844
 11690 memset                                    11.0701
 11415 del_timer_sync                            22.2949
 10952 __copy_user                                4.6884
  9090 xfs_ilock                                 17.7539
  9087 zap_pte_range                              4.7328
  8122 finish_task_switch                        28.2014
  7125 find_get_page                             17.1274
  6288 link_path_walk                             0.6318
  6047 get_zone_counts                           15.7474
  6045 __down_trylock                            18.8906
  5745 _pagebuf_find                              3.9896
  4873 xfs_trans_push_ail                         3.1725
  4613 current_kernel_time                       24.0260
  4200 xfs_iaccess                                4.1016
  4199 fd_install                                14.5799

real    1m32.766s
user    0m0.191s
sys     1m32.592s
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