On Thu, 03 Feb 2005 06:21:46 +0100
Christian Schmid <webmaster@xxxxxxxxxxxxxx> wrote:
> Actually, thats my problem. Single streams are too slow! Before I had buffers
> up to 500 KB. This was
> very nice to CPU because I only needed to "push" more data once in 5 seconds.
> I am doing this every
> second now... *sigh* well maybe you might just want to add a /proc file in
> order to configure this
> btw: Another problem I am experiencing is that downloads suddenly break in
> speed from 360 kb/sec to
> 8-12 kb/sec. 5 seconds later they stall completely. But the interesting part
> is, that the send-queue
> is completely full (checked with a grep in netstat). This looks like as if
> the receiver is just too
> slow. But this is not the case. That makes it rather funny. The receiver is
> waiting with an empty
> pipe but linux doesn't send. What could this be?
Are you using a board that support TCP Segmentation Offload. The problem may
well be that
before we were not doing congestion control properly with TSO. A pre-2.6.8
host with TSO was violating
all sorts of RFC's and unfairly monopolizing bandwidth.
Stephen Hemminger <shemminger@xxxxxxxx>