Hi, So maybe enlarge MEMP_NUM_PBUF 100-150 your have the memory for it ☺
Noam. From: lwip-users [mailto:[email protected]] On Behalf Of Itzik Levi Sent: Tuesday, November 07, 2017 6:15 PM To: Mailing list for lwIP users Subject: Re: [lwip-users] Lwip tcp-stack reliability issue when using non-reliable network? Hi Noam, Thanks. Just increased both MEMP_NUM_PBUF to 50, MEM_NUM_TCP_PCB TO 15. I'm not sure if its harder to reproduce(longer time to run) - maybe. but it still happens.. On Tue, Nov 7, 2017 at 5:36 PM, Noam Weissman <[email protected]<mailto:[email protected]>> wrote: Hi, Check that you have MEMP_NUM_PBUF 50 or more that MEMP_NUM_TCP_PCB is 15 or more The above may help, I think. Noam. From: lwip-users [mailto:lwip-users-bounces+noam<mailto:lwip-users-bounces%2Bnoam>[email protected]<mailto:[email protected]>] On Behalf Of Itzik Levi Sent: Tuesday, November 07, 2017 5:29 PM To: Mailing list for lwIP users Subject: Re: [lwip-users] Lwip tcp-stack reliability issue when using non-reliable network? Unfortunately, enabling Nagle did not do the trick, still got the same result. :( On Tue, Nov 7, 2017 at 4:20 PM, Itzik Levi <[email protected]<mailto:[email protected]>> wrote: Thanks for the reply! Actually, the end goal is to integrate the solution into rfcomm. For now, the "physical layer" is being simulated by a single local host tcp connection(under Android OS). The losses are simulated by simply randomly dropping data in lwip's pppos "output_cb". I'll attempt to re-enable Nagle, see if there is any changes and report back. On Tue, Nov 7, 2017 at 4:09 PM, Gisle Vanem <[email protected]<mailto:[email protected]>> wrote: Itzik Levi wrote: I'll go over your lwipopts and see whether I missed something. In addition, I will attempt to useSO_SNDTIMEO and SO_RCVTIMEO instead of polling in parallel to write and read(I understand by the samples its a more health way of using this api). If you have anymore suggestions, that will be great! I think you wrote earlier than you had disabled "Nagle algorithm". Are you sure that's a good idea? Maybe you're saturating your RF-link with small fragments. Just a thought since it's almost never a good idea to turn off Nagle. -- --gv _______________________________________________ lwip-users mailing list [email protected]<mailto:[email protected]> https://lists.nongnu.org/mailman/listinfo/lwip-users _______________________________________________ lwip-users mailing list [email protected]<mailto:[email protected]> https://lists.nongnu.org/mailman/listinfo/lwip-users
_______________________________________________ lwip-users mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/lwip-users
