Re: UDP Rate
Re: UDP Rate
- Subject: Re: UDP Rate
- From: Justin Walker <email@hidden>
- Date: Sat, 21 Feb 2004 13:48:39 -0800
Another comment, below:
On Friday, February 20, 2004, at 11:48 PM, Zack Morris wrote:
3. If the packet send success goes over 90% I turn up the speed, if
it goes
below 75%, I turn it down. Are these reasonable numbers? I am afraid
maybe
modems never go above 80% for instance.
As I indicated in my previous response, I don't know what success means
here. Note that, since UDP won't tell you if packets get dropped at
any point prior to transmission, you can't really measure success
directly. Also, this is affected by media speed. If you are blasting
packets from your app, the system will do its best to handle them, but
it is limited by media speed. Thus, if your rate of packet blast is
constant, you will find you are dropping more packets *inside the
system* for slower links. Each driver will only queue so many packets,
and each link can only handle so many per square second, so it should
be clear that the slower the link, the worse it gets if you aren't
applying some application layer protocol to meter packets out of your
app.
Regards,
Justin
--
Justin C. Walker, Curmudgeon-At-Large *
Institute for General Semantics | Some people have a mental
| horizon of radius zero, and
| call it their point of view.
| -- David Hilbert
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| References: | |
| | >UDP Rate (From: Zack Morris <email@hidden>) |