From: Florian Schmidt <mista.tapas@gmx.net>
To: Florian Schmidt <mista.tapas@gmx.net>
Cc: Ingo Molnar <mingo@elte.hu>, "K.R. Foley" <kr@cybsft.com>,
Mark_H_Johnson@raytheon.com, linux-kernel@vger.kernel.org,
Lee Revell <rlrevell@joe-job.com>,
Rui Nuno Capela <rncbc@rncbc.org>, Bill Huey <bhuey@lnxw.com>,
Adam Heath <doogie@debian.org>,
Thomas Gleixner <tglx@linutronix.de>,
Michal Schmidt <xschmi00@stud.feec.vutbr.cz>,
Fernando Pablo Lopez-Lezcano <nando@ccrma.Stanford.EDU>,
Karsten Wiese <annabellesgarden@yahoo.de>,
Gunther Persoons <gunther_persoons@spymac.com>,
emann@mrv.com, Shane Shrybman <shrybman@aei.ca>,
Amit Shah <amit.shah@codito.com>,
Stefan Schweizer <sschweizer@gmail.com>
Subject: Re: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm1-V0.7.27-3
Date: Tue, 16 Nov 2004 22:32:43 +0100 [thread overview]
Message-ID: <20041116223243.43feddf4@mango.fruits.de> (raw)
In-Reply-To: <20041116222039.662f41ac@mango.fruits.de>
On Tue, 16 Nov 2004 22:20:39 +0100
Florian Schmidt <mista.tapas@gmx.net> wrote:
> /proc/latency_trace doesn't show that high latencies either on console
> switch:
>
correction: now i do see large wakeup latencies in /proc/latency_trace, but
only when rtc_wakeup is not running [??? :)]. something's fishy..
(IRQ 1/18/CPU#0): new 2 us maximum-latency wakeup.
(IRQ 1/18/CPU#0): new 3 us maximum-latency wakeup.
(syslogd/302/CPU#0): new 4 us maximum-latency wakeup.
(ksoftirqd/0/3/CPU#0): new 4 us maximum-latency wakeup.
(ksoftirqd/0/3/CPU#0): new 5 us maximum-latency wakeup.
(IRQ 0/2/CPU#0): new 857 us maximum-latency wakeup.
(IRQ 0/2/CPU#0): new 891 us maximum-latency wakeup.
(IRQ 0/2/CPU#0): new 976 us maximum-latency wakeup.
(IRQ 0/2/CPU#0): new 1117 us maximum-latency wakeup.
It seems this excerpt from below trace is characteristic for all the long
traces:
5 80000002 0.001ms (+1.114ms): __do_softirq (do_softirq)
5 00000000 1.115ms (+0.000ms): preempt_schedule (_mmx_memcpy)
preemption latency trace v1.0.7 on 2.6.10-rc2-mm1-RT-V0.7.27-10
-------------------------------------------------------
latency: 1117 us, entries: 22 (22) | [VP:0 KP:1 SP:1 HP:1 #CPUS:1]
-----------------
| task: IRQ 0/2, uid:0 nice:0 policy:1 rt_prio:50
-----------------
=> started at: try_to_wake_up+0x51/0x170 <c010f3a1>
=> ended at: finish_task_switch+0x51/0xb0 <c010f911>
=======>
5 80010004 0.000ms (+0.000ms): trace_start_sched_wakeup (try_to_wake_up)
5 80010003 0.000ms (+0.000ms): (49) ((98))
5 80010003 0.000ms (+0.000ms): (2) ((5))
5 80010003 0.000ms (+0.000ms): try_to_wake_up (wake_up_process)
5 80010003 0.000ms (+0.000ms): (0) ((1))
5 80010002 0.000ms (+0.000ms): preempt_schedule (try_to_wake_up)
5 80010002 0.000ms (+0.000ms): wake_up_process (redirect_hardirq)
5 80010001 0.000ms (+0.000ms): preempt_schedule (__do_IRQ)
5 80010001 0.000ms (+0.000ms): irq_exit (do_IRQ)
5 80000002 0.000ms (+0.000ms): do_softirq (irq_exit)
5 80000002 0.001ms (+1.114ms): __do_softirq (do_softirq)
5 00000000 1.115ms (+0.000ms): preempt_schedule (_mmx_memcpy)
5 90000000 1.115ms (+0.000ms): __schedule (preempt_schedule)
5 90000000 1.115ms (+0.000ms): profile_hit (__schedule)
5 90000001 1.116ms (+0.000ms): sched_clock (__schedule)
2 80000002 1.116ms (+0.000ms): __switch_to (__schedule)
2 80000002 1.116ms (+0.000ms): (5) ((2))
2 80000002 1.116ms (+0.000ms): (98) ((49))
2 80000002 1.116ms (+0.000ms): finish_task_switch (__schedule)
2 80000001 1.116ms (+0.000ms): trace_stop_sched_switched (finish_task_switch)
2 80000001 1.116ms (+0.003ms): (2) ((49))
2 80000001 1.120ms (+0.000ms): trace_stop_sched_switched (finish_task_switch)
Ah, and one more thing: When i boot up the computer my init script sets irq
3 to prio 98. But it seems the irq handler's priority changes actually when
the soundcard is used the first time. So i need to re-set the irq prio
_after_ i have used the soundcard for the first time..
flo
next prev parent reply other threads:[~2004-11-16 21:32 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-16 16:09 [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm1-V0.7.27-3 Mark_H_Johnson
2004-11-16 18:43 ` Ingo Molnar
2004-11-16 18:41 ` K.R. Foley
2004-11-16 19:51 ` K.R. Foley
2004-11-16 21:24 ` Ingo Molnar
2004-11-16 21:20 ` Florian Schmidt
2004-11-16 21:32 ` Florian Schmidt [this message]
2004-11-16 22:42 ` Ingo Molnar
2004-11-16 22:04 ` Florian Schmidt
2004-11-16 23:11 ` Ingo Molnar
2004-11-16 22:55 ` Florian Schmidt
2004-11-16 23:29 ` Florian Schmidt
2004-11-17 0:06 ` john cooper
2004-11-17 11:23 ` Florian Schmidt
2004-11-17 12:28 ` Ingo Molnar
2004-11-17 13:02 ` Ingo Molnar
2004-11-17 12:14 ` Florian Schmidt
2004-11-17 13:41 ` Ingo Molnar
2004-11-17 12:59 ` Florian Schmidt
2004-11-17 13:35 ` Paul Ma
2004-11-17 13:45 ` Ingo Molnar
2004-11-17 13:00 ` Florian Schmidt
2004-11-17 15:01 ` Ingo Molnar
2004-11-17 6:19 ` [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm1-V0.7.27-11 ???
2004-11-16 21:42 ` [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm1-V0.7.27-3 K.R. Foley
2004-11-16 21:47 ` Florian Schmidt
2004-11-16 22:31 ` Ingo Molnar
2004-11-16 21:33 ` Florian Schmidt
2004-11-16 21:40 ` Florian Schmidt
2004-11-16 23:03 ` Ingo Molnar
2004-11-17 7:59 ` BUG with 0.7.27-11, with KGDB Amit Shah
2004-11-17 8:26 ` Bill Huey
2004-11-17 9:19 ` Bill Huey
2004-11-17 12:05 ` Ingo Molnar
-- strict thread matches above, loose matches on Subject: below --
2004-11-17 14:01 [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm1-V0.7.27-3 Mark_H_Johnson
2004-11-16 16:15 Mark_H_Johnson
2004-11-16 17:39 ` K.R. Foley
2004-10-27 0:15 [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0.3 Ingo Molnar
2004-11-03 10:58 ` [patch] Real-Time Preemption, -RT-2.6.10-rc1-mm2-V0.7.1 Ingo Molnar
2004-11-06 15:57 ` [patch] Real-Time Preemption, -RT-2.6.10-rc1-mm3-V0.7.18 Ingo Molnar
2004-11-08 9:16 ` [patch] Real-Time Preemption, -RT-2.6.10-rc1-mm3-V0.7.19 Ingo Molnar
2004-11-08 16:57 ` [patch] Real-Time Preemption, -RT-2.6.10-rc1-mm3-V0.7.21 Ingo Molnar
2004-11-09 16:05 ` [patch] Real-Time Preemption, -RT-2.6.10-rc1-mm3-V0.7.23 Ingo Molnar
2004-11-11 14:44 ` [patch] Real-Time Preemption, -RT-2.6.10-rc1-mm3-V0.7.25-0 Ingo Molnar
2004-11-11 21:51 ` [patch] Real-Time Preemption, -RT-2.6.10-rc1-mm3-V0.7.25-1 Ingo Molnar
2004-11-16 12:54 ` [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm1-V0.7.27-0 Ingo Molnar
2004-11-16 13:09 ` [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm1-V0.7.27-1 Ingo Molnar
2004-11-16 13:40 ` [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm1-V0.7.27-3 Ingo Molnar
2004-11-16 14:20 ` Florian Schmidt
2004-11-16 15:08 ` Florian Schmidt
2004-11-16 15:29 ` Florian Schmidt
2004-11-16 15:52 ` Stefan Schweizer
2004-11-16 18:43 ` Marcos D. Marado Torres
2004-11-16 18:51 ` Lee Revell
2004-11-16 19:53 ` Ingo Molnar
2004-11-17 0:36 ` Bill Huey
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