Hi,
As a continuation to my earlier mail. I just remembered something so I added it
here.
Several years ago when I started working with LwIP I had a similar problems to
the one you raised.
System was working ok but out of the blue it crashed.
I got a project that someone else started and continued from there…
From examining the lwipopts and opts files and doing some debugging I found
that my options were not properly set.
Especially the following:
//#define MEMP_NUM_TCP_SEG 20
#define MEMP_NUM_TCP_SEG TCP_SND_QUEUELEN // 20 // This was previosly
20 and cause a MEM_ERR it was changed
// to BE THE SAME SIZE AS
TCP_SND_QUEUELEN
Originally MEMP_NUM_TCP_SEG was a fixed number and was defined separately from
TCP_SND_QUEUELEN.
I found the hard way that I am getting MEM_ERR because of the above. I did not
had sufficient MEMP_NUM_TCP_SEG
defined. After changing the above to what it is now those issues were solved.
Also see the following error (from LwIP init.c):
“
#error "lwip_sanity_check: WARNING: MEMP_NUM_TCP_SEG should be at least as big
as TCP_SND_QUEUELEN. If you know what you
are doing, define
LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error."
The opts.h file defines MEMP_NUM_TCP_SEG as a fixed value and that causes an
error that I am probably not the only one
That encountered.
Hope that helped.
BR,
Noam.
From: lwip-users [mailto:[email protected]] On
Behalf Of Noam Weissman
Sent: Monday, November 28, 2016 1:14 PM
To: Mailing list for lwIP users
Subject: Re: [lwip-users] lwIP with FreeRTOS memory problem
Hi,
I am not sure with my reply as this area is not so documented.
What I can see in your lwipopts that you use tons of memory for the LwIP heap
but
other defines are way to small
For example:
#define MEMP_NUM_PBUF 16 <<< ?
#define MEMP_NUM_UDP_PCB 4
#define MEMP_NUM_TCP_PCB 32
#define MEMP_NUM_TCP_PCB_LISTEN 8
I am using a micro (STM32F4 and F2) with limited memory and never had to use
more than 20K RAM.
LwIP own opts.h file has macro’s in it and there is a reason for that. Some
values have relations with other values.
I have attached my own lwipopts.h for your reference. Use it and hopefully it
will help you.
Do understand that I have set up RAW API and Socket API as well. I use mostly
RAW API but as
I am using PolarSSL I need the Socket API as well.
Good luck,
Noam.
From: lwip-users [mailto:[email protected]] On
Behalf Of pekez
Sent: Monday, November 28, 2016 12:18 PM
To: Mailing list for lwIP users
Subject: [lwip-users] lwIP with FreeRTOS memory problem
Hello people,
I've been trying to figure out how lwIP uses memory and it's really important
to know exact (or maximum) amount of memory that lwIP uses. I am using lwIP
v1.4.1 with FreeRTOS v8.2.3 on ZYNQ custom board. Right now, I am working with
application examples provided by Xilinx
(XAPP1026<https://www.xilinx.com/support/documentation/application_notes/xapp1026.pdf>).
On ZYNQ board, I am running iperf<https://en.wikipedia.org/wiki/Iperf> server,
and on PC iperf client.
When both MEMP_MEM_MALLOC and MEM_LIBC_MALLOC are 0 then everything works
completely expected. However, when I set MEMP_MEM_MALLOC to 1 (according to RAM
usage article from lwIP wiki<http://lwip.wikia.com/wiki/Lwipopts.h>), so that
every piece of dynamically allocated memory comes from heap of MEM_SIZE size,
application always crashes, no matter how big or small MEM_SIZE is (I have a
lot of RAM, so I tried to put MEM_SIZE to even more then 20 MB!). Application
crashes because two of FreeRTOS asserts fail, I get these two prints: "Assert
failed in file queue.c, line 1224" and "Assert failed in file port.c, line
424". According to call trace (which I provided in attachments), it crashes
when XEmacPs_IntrHandler (I am using Xilinx layer 2 drivers) tries to allocate
memory for pbuf.
Is this problem even related to lwIP or maybe to FreeRTOS or Xilinx drivers,
what do you think? I am also providing the entire lwipopts.h, so that you can
see whether some other options need to be changed in order to make application
work with MEMP_MEM_MALLOC set to 1.
Thanks in advance.
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