lkml.org 
[lkml]   [1998]   [Jun]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectTCP bug?
Date
hello all,

I'm new to this list so please don't flame me, if I'm asking an old
question (yes, I searched the archiv but didn't found the answer).

When using TCP sockets on Linux, the following problem occurs:
If I try to send a packet of Data that's a little bit larger than the
MTU of the ethernet-card, the connection slows down rapidly. This
problem does not occur, if I try to send more than 2xMTU Bytes of Data.


For example: The MTU is 1500 Byte => 1460 Byte user-data can be carried.
If I try to send in a loop 100x1461 Byte it needs up to 100 seconds!
If I try to send 100x2921 Bytes (2x1460 + 1) it needs 1 second!
This numbers are related to the MTU.

tcpdump showed, that the ack packets in the first case need 0.5 seconds!

I tried this with kernel 2.0.30 and 2.0.32.

Please could you tell me, if it's a known bug and if a patch is
available?

thanks in advance

Oliver Wolters

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu

\
 
 \ /
  Last update: 2005-03-22 13:42    [W:0.029 / U:0.596 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site