From: Matt Mackall <mpm@selenic.com>
To: Lee Revell <rlrevell@joe-job.com>
Cc: jackit-devel <jackit-devel@lists.sourceforge.net>,
Ingo Molnar <mingo@elte.hu>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: Statistical methods for latency profiling
Date: Sat, 31 Jul 2004 21:55:38 -0500 [thread overview]
Message-ID: <20040801025538.GY5414@waste.org> (raw)
In-Reply-To: <1091251357.1677.116.camel@mindpipe>
On Sat, Jul 31, 2004 at 01:22:37AM -0400, Lee Revell wrote:
> Hey,
>
> Recently Ingo Molnar asked in one of the voluntary-preempt threads for
> the minimum and average scheduling delay reported by jackd. JACK does
> not currently maintain these statistics.
>
> I realized that the distribution of maximum latencies reported on each
> process cycle is fairly normally distributed.
This is not at all what I would expect. Instead, I'd expect to see
something like a gamma distribution, where we have everything
clustered down close to zero, but with a very long tail in the
positive direction falling off exponentially and obviously a hard
limit on the other side..
--
Mathematics is the supreme nostalgia of our time.
next prev parent reply other threads:[~2004-08-01 2:56 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-31 5:22 Lee Revell
2004-08-01 2:55 ` Matt Mackall [this message]
2004-08-01 3:24 ` [Jackit-devel] " Lee Revell
2004-08-01 5:59 ` Lee Revell
2004-08-01 11:21 ` Ingo Molnar
2004-08-01 11:53 ` Lee Revell
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