From: Brett Foster <fosterb@uoguelph.ca>
To: kernel coder <lhrkernelcoder@gmail.com>
Cc: linux-mips@linux-mips.org
Subject: Re: Almost 80% of UDP packets dropped
Date: Sat, 07 Jan 2006 02:38:11 -0500 [thread overview]
Message-ID: <43BF6FE3.7030600@uoguelph.ca> (raw)
In-Reply-To: <f69849430601062302if424acey70e98f86e0de36e6@mail.gmail.com>
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
next prev parent reply other threads:[~2006-01-07 7:35 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-07 7:02 Almost 80% of UDP packets dropped kernel coder
2006-01-07 7:38 ` Brett Foster [this message]
2006-01-07 9:24 ` Kevin D. Kissell
2006-01-07 9:24 ` Kevin D. Kissell
2006-01-07 9:48 ` Alan Cox
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