From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gary Thomas To: Marco Monguzzi Cc: ecos-discuss@sourceware.cygnus.com, Grant Edwards Subject: RE: [ECOS] problems with MBUFs (TCP/IP stack) Date: Mon, 10 Jul 2000 10:41:00 -0000 Message-id: References: X-SW-Source: 2000-07/msg00088.html On 10-Jul-2000 Marco Monguzzi wrote: >> I've set up a test script that starts and stops my host-end >> application, and so far have about 500 TCP/IP open/close cycles >> without problems. I haven't been printing MBUF counters, but I >> haven't seen any panics or anything else odd. After I let this >> run for a while longer, I might have to try it with the program >> from the test suite. > > I would appreciate whether you could provide me with you test programs. > I will try them on my target. A bit more on the behavior we observe with > server_test.c: we found that the problem is in the "close connection > sequence" > (close(client); Line 128). One MBUF remains allocated because not all the > needed > "free functions" are called. In detail, close() does not call tcp_close(). > The latter should call the free() for the tcp_template that we think remains > allocated. > Are you sure about this? The 'close(client)' call should end up calling "socket_close()" which in turn calls "tcp_close()". Have you tried tracing through this, e.g. using GDB, to see what happens when you call 'close(client)'?