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Date: Mon, 6 Jan 2003 15:50:24 -0800
From: William Lee Irwin III <wli@holomorphy.com>
To: Chris Wood <cwood@xmission.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.4.20, .text.lock.swap cpu usage? (ibm x440)
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On Mon, Jan 06, 2003 at 04:35:17PM -0700, Chris Wood wrote:
>   6383 .text.lock.swap                          110.0517
>   4689 .text.lock.vmscan                         28.2470
>   4486 shrink_cache                               4.6729
>    168 rw_swap_page_base                          0.6176
>    124 prune_icache                               0.5167
>     81 statm_pgd_range                            0.1534
>     51 .text.lock.inode                           0.0966
>     38 system_call                                0.6786
>     31 .text.lock.tty_io                          0.0951
>     31 .text.lock.locks                           0.1435
>     18 .text.lock.sched                           0.0373
>     16 _stext                                     0.2000
>     15 fput                                       0.0586
>     11 .text.lock.read_write                      0.0924
>      9 strnicmp                                   0.0703
>      9 do_wp_page                                 0.0110
>      9 do_page_fault                              0.0066
>      9 .text.lock.namei                           0.0073
>      9 .text.lock.fcntl                           0.0714
>      8 sys_read                                   0.0294

This is really bad lock contention. You may need 2.5.x.


Bill
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