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From: "Paul E. McKenney" <paulmck@us.ibm.com>
To: Karim Yaghmour <karim@opersys.com>
Cc: Kristian Benoit <kbenoit@opersys.com>,
	linux-kernel@vger.kernel.org, bhuey@lnxw.com, andrea@suse.de,
	tglx@linutronix.de, mingo@elte.hu, pmarques@grupopie.com,
	bruce@andrew.cmu.edu, nickpiggin@yahoo.com.au, ak@muc.de,
	sdietrich@mvista.com, dwalker@mvista.com, hch@infradead.org,
	akpm@osdl.org, rpm@xenomai.org
Subject: Re: PREEMPT_RT vs I-PIPE: the numbers, part 2
Date: Wed, 22 Jun 2005 14:23:54 -0700	[thread overview]
Message-ID: <20050622212354.GI1296@us.ibm.com> (raw)
In-Reply-To: <42B9B917.9010606@opersys.com>

On Wed, Jun 22, 2005 at 03:16:39PM -0400, Karim Yaghmour wrote:
> 
> Paul E. McKenney wrote:
> > (And, yes, there are other CDFs lacking a 30us bulge that would be
> > consistent with a 55us "blue-moon" bulge -- so I guess I am asking
> > if you have the CDF or the raw latency measurements -- though the
> > data set might be a bit large...  And I would have to think about
> > how one goes about deriving individual-latency CDF(s) given a single
> > dual-latency CDF, assuming that this is even possible...)
> 
> This is a bandwidth issue. The compressed archive containing the
> interrupt latencies of all our test runs is 100MB. I could provide
> a URL _privately_ to a handful of individuals, but beyond that
> someone's going to have to host it.
> 
> Let me know if you want this.

The approach of measuring the target's and the logger's latencies 
separately is a -much- better approach than using strange mathematical
techniques with strange mathematical assumptions.  So please don't
waste any further time on my misguided request for the full data set!

> Of course, now that LRTBF is out there, others can generate their
> own data sets.

True enough!

						Thanx, Paul

  reply	other threads:[~2005-06-22 21:27 UTC|newest]

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-06-20 17:13 PREEMPT_RT vs I-PIPE: the numbers, part 2 Kristian Benoit
2005-06-20 18:31 ` Bill Huey
2005-06-22 16:00   ` Karim Yaghmour
2005-06-22 19:29     ` Bill Huey
2005-06-22 20:05       ` Ingo Molnar
2005-06-22 20:39         ` Karim Yaghmour
2005-06-22 22:04           ` Ingo Molnar
2005-06-22 23:03             ` Lee Revell
2005-06-22 23:52               ` Karim Yaghmour
2005-06-22 23:38             ` Karim Yaghmour
2005-06-22 23:57               ` Andrea Arcangeli
2005-06-23  0:05               ` Daniel Walker
2005-06-23  0:48                 ` Karim Yaghmour
2005-06-23  0:06               ` Ingo Molnar
2005-06-23  0:47                 ` Karim Yaghmour
2005-06-23  0:55                   ` Bill Huey
2005-06-23  1:09                     ` Karim Yaghmour
2005-06-23  1:15                       ` Bill Huey
2005-06-23  1:47                         ` Karim Yaghmour
2005-06-23  0:59                   ` David Lang
2005-06-23  1:22                     ` Karim Yaghmour
2005-06-23  1:42                       ` David Lang
2005-06-23  2:09                         ` Karim Yaghmour
2005-06-23  2:15                           ` David Lang
2005-06-23  1:34                   ` Ingo Molnar
2005-06-23  2:02                     ` Karim Yaghmour
2005-06-23  3:57                       ` Lee Revell
2005-06-23  4:13                         ` Karim Yaghmour
2005-06-22 20:10       ` Karim Yaghmour
2005-06-22 20:15         ` Bill Huey
2005-06-21  1:55 ` Paul E. McKenney
2005-06-21  2:29   ` Karim Yaghmour
2005-06-22  1:19     ` Paul E. McKenney
2005-06-22 15:31       ` Karim Yaghmour
2005-06-22 15:27         ` Kristian Benoit
2005-06-22 16:27         ` Paul E. McKenney
2005-06-22 17:20           ` Kristian Benoit
2005-06-22 17:34             ` Ingo Molnar
2005-06-22 17:40               ` Ingo Molnar
2005-06-22 18:12                 ` Karim Yaghmour
2005-06-22 18:14                   ` Ingo Molnar
2005-06-22 19:04                     ` Karim Yaghmour
2005-06-22 18:50             ` Paul E. McKenney
2005-06-22 19:04               ` Ingo Molnar
2005-06-22 20:17                 ` Karim Yaghmour
2005-06-22 20:22                   ` Ingo Molnar
2005-06-22 21:03                     ` Karim Yaghmour
2005-06-22 21:10                       ` Ingo Molnar
2005-06-22 21:32                         ` Karim Yaghmour
2005-06-22 22:41                       ` Ingo Molnar
2005-06-22 23:02                         ` Karim Yaghmour
2005-06-22 21:20                 ` Paul E. McKenney
2005-06-22 19:08               ` Karim Yaghmour
2005-06-23 14:48             ` Paulo Marques
2005-06-22 17:58           ` Karim Yaghmour
2005-06-22 18:47             ` Paul E. McKenney
2005-06-22 19:16               ` Karim Yaghmour
2005-06-22 21:23                 ` Paul E. McKenney [this message]
2005-06-22 17:17         ` Lee Revell
2005-06-22 17:32           ` Karim Yaghmour
2005-06-29  7:43           ` PREEMPT_RT & threading IRQ 0 Ingo Molnar

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