Thanks Simon. The FreeRTOS tic is running at 1mSec.
Test setup is laptop and Nucleo on my desk with hub, so round-trip
should be fast, no?
What other timers could be involved?
Where should I look for LwIP <-> low-level timer setup/use?
Possibly ST's implementation is sub-optimal.
Thanks for the help,
Best Regards, Dave
On 2/28/2019 1:09 PM, [email protected] wrote:
Am 28.02.2019 um 17:42 schrieb Dave Nadler:
I naively expected that after receiving the" duplicate ack"
signalling a packet dropped,
LwIP would immediately re-transmit the dropped packet.
No, TCP fast retransmission starts after 3 dupacks only.
Instead there is a 1.5 second pause (see Wireshark trace below).
Why is that?
Yeah, that's a little strange. I would have expected ~250ms for the
RTO retransmission,
but then again, it depends on your roundtrip time.
But it could well be 1.5 seconds because your timers are not coming at
the expected interval?
Regards,
Simon
_______________________________________________
lwip-users mailing list
[email protected]
https://lists.nongnu.org/mailman/listinfo/lwip-users
--
Dave Nadler, USA East Coast voice (978) 263-0097, [email protected], Skype
Dave.Nadler1
_______________________________________________
lwip-users mailing list
[email protected]
https://lists.nongnu.org/mailman/listinfo/lwip-users
