In lwipopts.h #define MEMP_MEM_MALLOC (4096)
What happens if you increase that? On Sat, 20 Apr 2024 at 10:54 AM, Amit Rahman <amit.amit.rah...@gmail.com> wrote: > Hi all, > > I am working on a project using an STM32 Nucleo H563ZI board with lwIP and > FreeRTOS, and I am facing some issues with the stability of the network > stack. > > After running for a certain period (around 2-3 minutes), the board seems > to crash or freeze, and I am looking for guidance on how to troubleshoot > and resolve this problem. > > > Here's a summary of my setup and findings: > > 1. Development environment: > - STM32 Nucleo H563ZI board > - lwIP and FreeRTOS integration > - Ethernet communication with a local router and computer > - Static IP configuration, firewalls disabled > 2. Observations: > - The board runs normally for about 2-3 minutes before crashing or > freezing. > - When sending ping requests from the computer, the board responds > to about 30 pings before crashing, with an average round-trip time of > 10.774 ms, Ethernet looptime of about 10ms > - Without ping requests, the board sends out around 45 messages > before crashing. > - The crash seems to occur during packet processing or memory > management. > 3. Debugging findings: > - In the serial monitor, after the crash, I noticed the following > message: "pbuf_add_header: failed as 0x2002d244 < 0x2002d260 (not enough > space for new header size)" > - The debugger call stack gets stuck in a specific function > callstack where I suspect the assert fails. > - [image: image.png] > - Where the call stack is: > > tcip_try_callback (which is trying to call back pbuf_free_ooseq_callback) > pbuf_pool_is_empty > pbug_alloc > > - The pbuf length keeps increasing, as seen in the serial monitor > logs: "ip4_input: p->len 84 p->tot_len 84" etc etc > - > - Relevant code: > - I have attached the relevant source files, including: > - udp.c > - ethernetif.c > - lwipopts.h > - lwipopts_freertos.h > > My guess is that upon receipt in ARP probe response from my computer to > the board and/or the repeated ping requests from my computer, the stack > eventually runs out of memory, and the pbuf chain length keeps increasing, > however the issue with deallocating pbufs somewhere its not apparent to me. > > > I suspect that there might be a misconfiguration in the lwIP setup or > memory management, but I am unsure how to proceed with debugging and > resolving the issue. > > I would greatly appreciate any guidance or suggestions on the following: > > I had mostly based my code on the UDP echoserver example > https://github.com/STMicroelectronics/stm32h5-classic-coremw-apps/blob/main/Projects/NUCLEO-H563ZI/Applications/LwIP/LwIP_UDP_Echo_Server/Core/Src/main.c > > Unfortunately, I don't seem to see what I'm missing. > > Thank you in advance for your assistance. I look forward to your insights > and recommendations. > _______________________________________________ > lwip-users mailing list > lwip-users@nongnu.org > https://lists.nongnu.org/mailman/listinfo/lwip-users >
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