From: Kirk True <ktrue@movaris.com>
To: Kirk True <ktrue@movaris.com>
Cc: "Martin J. Bligh" <mbligh@aracnet.com>,
kernelnewbies <kernelnewbies@nl.linux.org>,
Linux-MM@kvack.org
Subject: Re: LTP VM test slower under 2.6.3 than 2.4.20
Date: Fri, 20 Feb 2004 11:03:43 -0800 [thread overview]
Message-ID: <40365A0F.8070003@movaris.com> (raw)
In-Reply-To: <40365887.6020204@movaris.com>
OK, try this profile for 2.4.20 instead (helps to use the right System.map):
221 default_idle 4.6042
2 error_code 0.0333
1 restore_fpu 0.0312
12 apm_bios_call_simple 0.0833
6 do_page_fault 0.0047
1 do_anonymous_page 0.0039
1 pte_alloc 0.0057
2 set_page_dirty 0.0179
1 add_to_page_cache_unique 0.0078
2 mark_page_accessed 0.0417
1 kmem_cache_free 0.0208
1 activate_page 0.0078
1 lru_cache_add 0.0104
2 __lru_cache_del 0.0179
14 shrink_cache 0.0179
3 swap_out_pmd 0.0117
2 try_to_swap_out 0.0048
2 __free_pages_ok 0.0030
7 rmqueue 0.0129
1 try_to_free_buffers 0.0039
1 ide_dmaproc 0.0012
53 fast_clear_page 0.6625
337 total 0.0003
Kirk
Kirk True wrote:
> Hi all,
>
> > A kernel profile might help.
>
> Here's the profiles comparing the two versions. I don't understand why
> no "do_page_fault" shows up under 2.4.20 or why "gunzip" does.
>
> Kirk
>
> -------------------------------------------------
>
>
>
> 2.6.3:
>
> # readprofile -r;./mem01;readprofile -m /boot/System.map-2.6.3 \
> >> captured_profile2.6.3
>
> 1446 poll_idle 24.9310
> 4 delay_tsc 0.1667
> 71 do_page_fault 0.0536
> 41 schedule 0.0238
> 13 __might_sleep 0.0637
> 1 prepare_to_wait 0.0068
> 1 put_files_struct 0.0042
> 3229 do_softirq 16.3081
> 1 run_timer_softirq 0.0022
> 4807 total 0.0262
>
>
>
> 2.4.20:
>
> # readprofile -r;./mem01;readprofile -m /boot/System.map-2.4.20 \
> >> captured_profile2.4.20
>
> 347 gunzip 0.1559
> 8 acpi_restore_state_mem 0.0021
> 2 proc_dostring 0.0033
> 3 access_process_vm 0.0054
> 2 __mod_timer 0.0038
> 1 del_timer 0.0065
> 1 update_one_process 0.0036
> 1 notifier_chain_unregister 0.0052
> 365 total 0.0020
>
> --
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next prev parent reply other threads:[~2004-02-20 19:03 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-20 16:36 LTP VM test slower under 2.6.3 than 2.4.20 Kirk True
2004-02-20 16:39 ` Martin J. Bligh
2004-02-20 18:57 ` Kirk True
2004-02-20 19:03 ` Kirk True [this message]
[not found] ` <40363DEE.9040608@movaris.com>
[not found] ` <5760000.1077296989@[10.10.2.4]>
2004-02-22 15:32 ` Kirk True
2004-02-20 22:45 ` Nick Piggin
2004-02-21 2:50 ` Kirk True
2004-02-21 2:50 ` Kirk True
2004-02-21 15:39 ` Kirk True
2004-02-23 7:19 ` Andrew Morton
2004-02-23 16:51 ` Kirk True
2004-02-23 19:42 ` Andrew Morton
2004-02-24 15:08 ` Kirk True
2004-02-24 23:38 ` Andrew Morton
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