Hi Michael Michael Tuexen wrote:
Hi Vlad, we are currently testing the receive behaviour of Linux (and other systems). We are using Fedora 9, kernel 2.6.25-14. The receiver application just opens a 1-to-many style socket and sleeps forever, not reading any messages. The sender (on a different machine), sends a lot of messages of the same size, all on stream 0, ordered. When setting the receive buffer space (using the SO_RCVBUF socket option) to 10000 we oberserve the following: - When sending messages of size 1000 bytes, the receiver SACK the first, announces 9000 bytes windows, SACKs the second announces 8000 bytes and so on. Look fine. The a_rwnd goes down to 0 and discards messages. Everything is fine. - When sending messages of size 100 bytes, the receiver SACKs the first messages and reduces the a_rwnd accordingly. Then it looks like the receive buffer grows, because messages are accepted and the a_rwnd does not shrink. Is this intended?
No. The a_rwnd should go down to 0 as before.
We also figured out that after about 670947 messages of size 100 bytes the association is aborted. Is this intended?
This is also not intended. We'll take a look. Thanks -vlad
- Sending messages of size 10 bytes is similar to 100 byes. Best regards Michael
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