Search found 355 matches

by elhobbs
Mon Jul 06, 2009 3:15 pm
Forum: DS/DSi Development
Topic: receive hangs; was TCP send() performance and eventual hangs
Replies: 41
Views: 91039

Re: TCP send() performance and eventual hangs

while(tmb->next) tmb=tmb->next; dswifi is maintaining a linked list of packets that have been received. this code is trying to find the end of the list - which is where new packets are added. it would appear that this list is becoming corrupt when packets are being received very close together. dsw...
by elhobbs
Sat Jul 04, 2009 5:27 pm
Forum: DS/DSi Development
Topic: receive hangs; was TCP send() performance and eventual hangs
Replies: 41
Views: 91039

Re: TCP send() performance and eventual hangs

it is to support hardware exceptions - accessing invalid memory addresses, stack overflow, etc.

can you post your source code and binary somewhere? I would be interested in taking a look.
by elhobbs
Sat Jul 04, 2009 2:32 am
Forum: DS/DSi Development
Topic: receive hangs; was TCP send() performance and eventual hangs
Replies: 41
Views: 91039

Re: TCP send() performance and eventual hangs

do you have an exception handler in place? this will install the default one: defaultExceptionHandler(); it uses iprintf to display. make sure that you are using the latest version of libnds and dswifi. when libnds switched ipc to use fifo it introduced a lot of instability to the dswifi module. it ...
by elhobbs
Fri Jul 03, 2009 3:29 am
Forum: DS/DSi Development
Topic: receive hangs; was TCP send() performance and eventual hangs
Replies: 41
Views: 91039

Re: TCP send() performance and eventual hangs

if you are able to utilize the full 2 mbit bandwidth than this is only ~4 packets a frame. so, probably 2-3 packets per frame is going to be the best you can hope for - most likely less if there is a lot of other network traffic.
by elhobbs
Thu Jul 02, 2009 1:42 pm
Forum: DS/DSi Development
Topic: receive hangs; was TCP send() performance and eventual hangs
Replies: 41
Views: 91039

Re: TCP send() performance and eventual hangs

I suspect when send returns less than 1420 that the internal send buffers are full and that you are exceeding the transmission rate on the ds. it is only 2Mbit/s - though I think people typically see 1Mbit/s at best. you could try waiting a frame or two if the send is smaller than 1420. I think I re...