From: Ingo Molnar <mingo@elte.hu>
To: Mark_H_Johnson@raytheon.com
Cc: Amit Shah <amit.shah@codito.com>,
Karsten Wiese <annabellesgarden@yahoo.de>,
Bill Huey <bhuey@lnxw.com>, Adam Heath <doogie@debian.org>,
emann@mrv.com, Gunther Persoons <gunther_persoons@spymac.com>,
"K.R. Foley" <kr@cybsft.com>,
linux-kernel@vger.kernel.org,
Florian Schmidt <mista.tapas@gmx.net>,
Fernando Pablo Lopez-Lezcano <nando@ccrma.Stanford.EDU>,
Lee Revell <rlrevell@joe-job.com>,
Rui Nuno Capela <rncbc@rncbc.org>,
Shane Shrybman <shrybman@aei.ca>,
Esben Nielsen <simlo@phys.au.dk>,
Thomas Gleixner <tglx@linutronix.de>,
Michal Schmidt <xschmi00@stud.feec.vutbr.cz>
Subject: Re: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm3-V0.7.32-6
Date: Thu, 9 Dec 2004 18:31:36 +0100 [thread overview]
Message-ID: <20041209173136.GE7975@elte.hu> (raw)
In-Reply-To: <OFADAD8EC1.8BCE1EC6-ON86256F65.005EFFA6@raytheon.com>
* Mark_H_Johnson@raytheon.com <Mark_H_Johnson@raytheon.com> wrote:
> >also, i'd like to take a look at latency traces, if you have them for
> >this run.
>
> I could if I had any. The _RT run had NO latency traces > 250 usec
> (the limit I had set for the test). The equivalent _PK run had 37 of
> those traces. I can rerun the test with a smaller limit to get some if
> it is really important. My build of -12 is almost done and we can see
> what kind of repeatability / results from the all_cpus trace shows.
/me is puzzled.
so all the CPU-loop delays within the -RT kernel are below 250 usecs? I
guess i dont understand what this means then:
| The max CPU latencies in RT are worse than PK as well. The values for
| RT range from 3.00 msec to 5.43 msec and on PK range from 1.45 msec to
| 2.24 msec.
these come from userspace timestamping? So where userspace detects a
delay the kernel tracer doesnt measure any?
Ingo
next prev parent reply other threads:[~2004-12-09 17:32 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-09 17:22 [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm3-V0.7.32-6 Mark_H_Johnson
2004-12-09 17:31 ` Ingo Molnar [this message]
2004-12-09 20:34 ` K.R. Foley
2004-12-09 22:06 ` Ingo Molnar
2004-12-09 23:16 ` K.R. Foley
2004-12-10 4:26 ` K.R. Foley
2004-12-10 11:22 ` Ingo Molnar
2004-12-10 15:26 ` K.R. Foley
-- strict thread matches above, loose matches on Subject: below --
2004-12-13 14:10 Mark_H_Johnson
2004-12-09 21:58 Mark_H_Johnson
2004-12-09 22:55 ` Ingo Molnar
2004-12-09 20:49 Mark_H_Johnson
2004-12-09 21:56 ` Ingo Molnar
2004-12-09 20:38 Mark_H_Johnson
2004-12-09 19:54 Mark_H_Johnson
2004-12-09 19:23 Mark_H_Johnson
2004-12-09 20:04 ` Ingo Molnar
2004-12-10 5:01 ` Bill Huey
2004-12-10 5:14 ` Steven Rostedt
2004-12-10 5:58 ` Bill Huey
2004-12-09 18:15 Mark_H_Johnson
2004-12-09 20:11 ` Ingo Molnar
2004-12-09 18:10 Mark_H_Johnson
2004-12-09 19:40 ` Ingo Molnar
2004-12-09 19:58 ` Ingo Molnar
2004-12-10 23:42 ` Steven Rostedt
2004-12-11 16:59 ` john cooper
2004-12-12 4:36 ` Steven Rostedt
2004-12-13 23:45 ` john cooper
2004-12-14 13:01 ` Steven Rostedt
2004-12-14 14:28 ` john cooper
2004-12-14 16:53 ` Steven Rostedt
2004-12-11 17:59 ` Esben Nielsen
2004-12-11 18:59 ` Steven Rostedt
2004-12-11 19:50 ` Esben Nielsen
2004-12-11 22:34 ` Steven Rostedt
2004-12-13 21:55 ` Bill Huey
2004-12-13 22:15 ` Steven Rostedt
2004-12-13 22:20 ` Ingo Molnar
2004-12-13 22:31 ` Ingo Molnar
2004-12-09 16:56 Mark_H_Johnson
2004-12-09 17:28 ` Ingo Molnar
2004-12-09 17:41 ` Ingo Molnar
2004-12-09 18:26 ` Ingo Molnar
2004-12-09 19:04 ` Esben Nielsen
2004-12-09 19:58 ` john cooper
2004-12-09 20:16 ` Lee Revell
2004-12-09 15:16 Mark_H_Johnson
2004-12-09 16:17 ` Florian Schmidt
2004-12-09 17:13 ` Ingo Molnar
2004-12-09 14:46 Mark_H_Johnson
2004-12-09 14:14 Mark_H_Johnson
2004-12-07 21:41 Mark_H_Johnson
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
2004-11-17 12:42 ` [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm1-V0.7.28-0 Ingo Molnar
2004-11-18 12:35 ` [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm1-V0.7.28-1 Ingo Molnar
2004-11-18 16:46 ` [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm2-V0.7.29-0 Ingo Molnar
2004-11-22 0:54 ` [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm2-V0.7.30-2 Ingo Molnar
2004-11-23 17:58 ` [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm2-V0.7.30-9 Ingo Molnar
2004-11-24 10:16 ` [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm2-V0.7.30-10 Ingo Molnar
2004-12-03 20:58 ` [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm2-V0.7.32-0 Ingo Molnar
2004-12-07 13:29 ` [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm3-V0.7.32-4 Ingo Molnar
2004-12-07 14:11 ` [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm3-V0.7.32-6 Ingo Molnar
2004-12-08 4:31 ` K.R. Foley
2004-12-08 8:34 ` Ingo Molnar
2004-12-08 16:07 ` K.R. Foley
2004-12-08 16:18 ` Lee Revell
2004-12-08 16:52 ` K.R. Foley
2004-12-08 16:58 ` Lee Revell
2004-12-09 9:02 ` Ingo Molnar
2004-12-09 2:45 ` K.R. Foley
2004-12-09 12:11 ` Ingo Molnar
2004-12-09 14:50 ` K.R. Foley
2004-12-08 17:13 ` Steven Rostedt
2004-12-08 18:14 ` Rui Nuno Capela
2004-12-08 19:03 ` Steven Rostedt
2004-12-08 21:39 ` Rui Nuno Capela
2004-12-08 22:11 ` Steven Rostedt
2004-12-09 9:32 ` Ingo Molnar
2004-12-09 13:36 ` Steven Rostedt
2004-12-09 9:06 ` Ingo Molnar
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