Re: [lwip-users] lwIP with FreeRTOS memory problem

[Noam Weissman]

Hi,

Regarding my lwipopts ... we use a telnet server and as a result send small 
chunks of data.

Originally MSS was 1500 bytes and that cause the system to be very slow when 
combined with HTTP etc.

The compromise that I made is to set MSS to its default 536 bytes. This slowed 
down HTTP communication but 
In all it is not so significant. In all I find this a general compromise that 
works fine.


BR,
Noam.

-----Original Message-----
From: lwip-users [mailto:address@hidden On Behalf Of pekez
Sent: Tuesday, November 29, 2016 1:29 PM
To: Mailing list for lwIP users
Subject: Re: [lwip-users] lwIP with FreeRTOS memory problem

All right people, but since my main goal is to know the exact amount of memory 
the lwIP uses, could I just find that out without setting MEMP_MEM_MALLOC to 1, 
since it seems that it requires some changes in the kernel itself, as Richard 
and Simon explained. I am still not daring to make such changes since I am not 
really experienced, and especially if I can avoid that (at least for now).

So, I have returned MEMP_MEM_MALLOC to 0, and generated with Xilinx SDK a .map 
file (it's in attachments). Can we say that lwIP for sure won't take more 
memory then what we can see in that file, ram_heap plus sum of everything that 
makes memp_memory (which includes entire pbuf_pool
(PBUF_POOL_BUFSIZE*PBUF_POOL_SIZE) as well)? Is there anyway I can verify that 
with mentioned iperf application, for example, to add some enormous array which 
will fill the rest of RAM, and try to write to it, and see whether that will 
make some influence on lwIP?

Noam, I had a look at your lwipopts.h, and I must say that your suggestions 
have helped when it comes to lwIP performance, especially the MEMP_NUM_PBUF 
define.

The Best,
Nenad