Re: Almost 80% of UDP packets dropped

[Brett Foster <fosterb@uoguelph.ca>]

kernel coder wrote:

>hi,
>    I was trying to measure the UDP reception speed on my borad which
>has MIPS 4kc processor with 133 MHZ speed.I was transfering 10mb file
>from intel pentium 4 machine to MIPS board,but the recieved file was
>only 900kB.
>  
>
UDP was not designed with reliability in mind -- it really isn't meant 
for sending a 10 meg file without a packet loss.

>When i further investigated the problem ,i came to know that the user
>application was not getting enough opportunities to get data from
>socket queue which caused almost 80% of packets to be dropped as
>socket queue had no free space.
>  
>
(Among other sources) I'm pretty sure this behaviour was discussed in:
Unix Network Programming, Vol. 1: The Sockets Networking API, Third Edition
(Something like page 257.)

I don't know if there is anything else going on with the kernel but...

Brett