From: "K.R. Foley" <kr@cybsft.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Scott Wood <scott@timesys.com>,
manas.saksena@timesys.com, linux-kernel@vger.kernel.org,
rlrevell@joe-job.com
Subject: Re: [patch] voluntary-preempt-2.6.8.1-P9
Date: Tue, 24 Aug 2004 22:26:27 -0500 [thread overview]
Message-ID: <412C06E3.8020804@cybsft.com> (raw)
In-Reply-To: <20040824061459.GA29630@elte.hu>
Any idea what is going on here?
dmesg gives me this:
(kswapd0/32): new 305 us maximum-latency critical section.
=> started at: <get_swap_page+0x28/0x280>
=> ended at: <get_swap_page+0x96/0x280>
[<c0135dbf>] check_preempt_timing+0x19f/0x240
[<c0151bf6>] get_swap_page+0x96/0x280
[<c0151bf6>] get_swap_page+0x96/0x280
[<c0135f88>] sub_preempt_count+0x48/0x60
[<c0135f88>] sub_preempt_count+0x48/0x60
[<c0151bf6>] get_swap_page+0x96/0x280
[<c015155a>] add_to_swap+0x2a/0xd0
[<c0142a73>] shrink_list+0x4e3/0x530
[<c01413a6>] lru_add_drain+0x36/0x70
[<c0135f88>] sub_preempt_count+0x48/0x60
[<c0142bc2>] shrink_cache+0x102/0x370
[<c0135f88>] sub_preempt_count+0x48/0x60
[<c0142c26>] shrink_cache+0x166/0x370
[<c014345e>] shrink_zone+0xae/0xe0
[<c0143871>] balance_pgdat+0x1e1/0x250
[<c01439a5>] kswapd+0xc5/0xe0
[<c0117cc0>] autoremove_wake_function+0x0/0x60
[<c0106336>] ret_from_fork+0x6/0x14
[<c0117cc0>] autoremove_wake_function+0x0/0x60
[<c01438e0>] kswapd+0x0/0xe0
[<c0104505>] kernel_thread_helper+0x5/0x10
The trace actually looks like this:
preemption latency trace v1.0.2
-------------------------------
latency: 305 us, entries: 2 (2)
-----------------
| task: kswapd0/32, uid:0 nice:0 policy:0 rt_prio:0
-----------------
=> started at: get_swap_page+0x28/0x280
=> ended at: get_swap_page+0x96/0x280
=======>
00000001 0.000ms (+0.000ms): get_swap_page (add_to_swap)
00000001 0.306ms (+0.306ms): sub_preempt_count (get_swap_page)
next prev parent reply other threads:[~2004-08-25 3:26 UTC|newest]
Thread overview: 93+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-23 22:18 [patch] PPC/PPC64 port of voluntary preempt patch Scott Wood
2004-08-24 6:14 ` [patch] voluntary-preempt-2.6.8.1-P9 Ingo Molnar
2004-08-24 17:43 ` K.R. Foley
2004-08-24 20:32 ` Lee Revell
2004-08-24 20:53 ` Scott Wood
2004-08-24 19:20 ` K.R. Foley
2004-08-24 22:47 ` Lee Revell
2004-08-25 2:00 ` Lee Revell
2004-08-25 3:17 ` K.R. Foley
2004-08-25 3:22 ` Lee Revell
2004-08-25 14:34 ` K.R. Foley
2004-08-25 16:00 ` K.R. Foley
2004-08-25 3:26 ` K.R. Foley [this message]
2004-08-25 9:58 ` [patch] voluntary-preempt-2.6.8.1-P9 : oprofile latency at 3.3ms P.O. Gaillard
2004-08-26 21:39 ` [patch] voluntary-preempt-2.6.8.1-P9 Lee Revell
2004-08-27 16:54 ` Lee Revell
2004-08-28 7:37 ` Ingo Molnar
2004-08-28 15:10 ` Lee Revell
2004-08-28 12:14 ` Ingo Molnar
2004-08-30 9:27 ` voluntary-preempt-2.6.8.1-P9 : big latency when logging on console P.O. Gaillard
2004-08-30 9:41 ` Ingo Molnar
2004-08-30 12:25 ` P.O. Gaillard
2004-08-30 9:48 ` [patch] voluntary-preempt-2.6.8.1-P9 : a few submillisecond latencies P.O. Gaillard
2004-08-28 12:03 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q0 Ingo Molnar
2004-08-28 16:18 ` Felipe Alfaro Solana
2004-08-28 16:50 ` K.R. Foley
2004-08-28 17:52 ` Lee Revell
2004-08-28 19:44 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q2 Ingo Molnar
2004-08-28 20:01 ` Lee Revell
2004-08-28 20:04 ` Ingo Molnar
2004-08-28 20:08 ` Lee Revell
2004-08-28 20:10 ` Daniel Schmitt
2004-08-28 20:31 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q3 Ingo Molnar
2004-08-28 21:10 ` Lee Revell
2004-08-28 21:13 ` Ingo Molnar
2004-08-28 21:16 ` Lee Revell
2004-08-28 23:51 ` Lee Revell
2004-08-29 2:35 ` Lee Revell
2004-08-29 5:43 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q4 Ingo Molnar
2004-08-29 6:57 ` Lee Revell
2004-08-29 18:01 ` Ingo Molnar
2004-08-29 19:06 ` Ingo Molnar
2004-08-30 0:47 ` K.R. Foley
2004-08-30 3:42 ` K.R. Foley
2004-08-30 13:06 ` Alan Cox
2004-08-30 17:37 ` Ingo Molnar
2004-08-31 16:39 ` K.R. Foley
2004-08-30 9:06 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q5 Ingo Molnar
2004-08-30 14:25 ` Thomas Charbonnel
2004-08-30 18:00 ` Ingo Molnar
2004-08-31 19:23 ` Thomas Charbonnel
2004-08-31 19:30 ` Ingo Molnar
2004-08-31 19:45 ` Thomas Charbonnel
2004-08-31 6:40 ` Lee Revell
2004-08-31 6:53 ` Ingo Molnar
2004-08-31 23:03 ` Lee Revell
2004-09-01 15:52 ` Martin Josefsson
2004-09-01 21:15 ` Lee Revell
2004-09-01 21:30 ` Lee Revell
2004-08-31 7:06 ` Ingo Molnar
2004-08-31 19:21 ` Lee Revell
2004-08-31 19:37 ` Ingo Molnar
2004-08-31 19:47 ` Lee Revell
2004-08-31 19:51 ` Ingo Molnar
2004-08-31 20:09 ` Ingo Molnar
2004-08-31 20:10 ` Lee Revell
2004-08-31 20:14 ` Ingo Molnar
2004-08-31 20:20 ` Ingo Molnar
2004-08-31 20:34 ` Lee Revell
2004-08-31 20:39 ` Ingo Molnar
2004-08-31 20:41 ` Lee Revell
2004-08-31 17:40 ` Peter Zijlstra
2004-09-01 1:43 ` Lee Revell
2004-09-01 2:30 ` Lee Revell
2004-09-01 7:27 ` Lee Revell
2004-09-01 8:29 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q6 Ingo Molnar
2004-09-01 13:51 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q7 Ingo Molnar
2004-09-01 17:09 ` Thomas Charbonnel
2004-09-01 19:03 ` K.R. Foley
2004-09-01 20:11 ` Peter Zijlstra
2004-09-01 20:16 ` Lee Revell
2004-09-01 20:53 ` K.R. Foley
[not found] ` <41367E5D.3040605@cybsft.com>
2004-09-02 5:37 ` Ingo Molnar
2004-09-02 5:40 ` Ingo Molnar
2004-08-30 12:52 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q3 Ingo Molnar
2004-08-29 7:40 ` Matt Heler
2004-08-24 19:51 ` [patch] PPC/PPC64 port of voluntary preempt patch Scott Wood
2004-08-26 3:17 ` Lee Revell
2004-08-26 16:38 ` Scott Wood
2004-08-27 1:18 ` Fernando Pablo Lopez-Lezcano
2004-08-28 12:36 ` Ingo Molnar
2004-08-28 13:01 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q1 Ingo Molnar
2004-08-30 1:06 ` Fernando Pablo Lopez-Lezcano
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