> On 10 Jul, 2021, at 2:01 am, Leonard Kleinrock wrote:
>
> No question that non-stationarity and instability are what we often see in
> networks. And, non-stationarity and instability are both topics that lead to
> very complex analytical problems in queueing theory. You can find some
>
"Holland, Jake via Bloat" writes:
> Hi David,
>
> That’s an interesting point, and I think you’re right that packet
> arrival is poorly modeled as a Poisson process, because in practice
> packet transmissions are very rarely unrelated to other packet
> transmissions.
>
> But now you’ve got me
David,
No question that non-stationarity and instability are what we often see in
networks. And, non-stationarity and instability are both topics that lead to
very complex analytical problems in queueing theory. You can find some results
on the transient analysis in the queueing theory
Hi David,
That’s an interesting point, and I think you’re right that packet arrival is
poorly modeled as a Poisson process, because in practice packet transmissions
are very rarely unrelated to other packet transmissions.
But now you’ve got me wondering what the right approach is. Do you have
A bit off topic per the control and queueing theory discussion; a four
second latency is going to fail our regression automation rigs. Way too
many WiFi users, particularly for games, require sub few hundreds of
milliseconds and sometimes even much lower. A TCP connect() getting behind
a 4 second
Len - I admit I made a mistake in challenging Little's Law as being based on
Poisson processes. It is more general. But it tells you an "average" in its
base form, and latency averages are not useful for end user applications.
However, Little's Law does assume something that is not actually
For those who might be interested in Little's law
there is a nice paper by John Little on the occasion
of the 50th anniversary of the result.
https://www.informs.org/Blogs/Operations-Research-Forum/Little-s-Law-as-Viewed-on-its-50th-Anniversary
David,
I totally appreciate your attention to when and when not analytical modeling
works. Let me clarify a few things from your note.
First, Little's law (also known as Little’s lemma or, as I use in my book,
Little’s result) does not assume Poisson arrivals - it is good for any arrival
Thank you, David!
On Thu, Jul 08, 2021 at 04:14:00PM -0400, David P. Reed wrote:
>
> Keep It Simple, Stupid.
>
> That's a classic architectural principle that still applies. Unfortunately
> folks who only think hardware want to add features to hardware, but don't
> study the actual real
