Re: [lwip-users] Raw TCP Client - wait for ACK after each packet causes slowdown

[Adrian Figueroa]

Thank you for your answer!

Yes, I tried hard, but it is still not clear to me.

I understand that there is a window after which an ACK is required to continue 
sending packets. So, I set:

#define TCP_WND 8576
#define TCP_SND_BUF 2144

While

#define TCP_MSS 536

Four packets should fit in the send buffer and the TCP_WND is high enough.

Please note that my client shall only send data packets. I do not care about 
receiving.

It still waits for ACK after each transmitted packet. Does something else come 
to your mind?

As for TCP_WND_UPDATE_THRESHOLD, this is only relevant for receiving, as far as 
I understood.

Thanks,
Adrian

-----Ursprüngliche Nachricht-----
Von: lwip-users [mailto:address@hidden Im Auftrag von Sergio R. Caprile
Gesendet: Monday, June 26, 2017 8:28 PM
An: address@hidden
Betreff: Re: [lwip-users] Raw TCP Client - wait for ACK after each packet 
causes slowdown

Have you read the docs ? the wiki ?
you can pump into the buffer as much as it fits into the buffer.
TCP can send as much as its window allows, and will certainly need ACKs to keep 
sending thereafter.
http://lwip.wikia.com/wiki/Raw/TCP
--
Sergio R. Caprile, Human Being, Bs.As., Argentina
         http://www.scaprile.ldir.com.ar/

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