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[lwip-devel] [bug #51033] LWIP_ASSERT while doing repetitive transmissio
From: |
preet |
Subject: |
[lwip-devel] [bug #51033] LWIP_ASSERT while doing repetitive transmission |
Date: |
Tue, 16 May 2017 15:26:27 -0400 (EDT) |
User-agent: |
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36 |
Follow-up Comment #5, bug #51033 (project lwip):
1) Reproduced it with Nagle algorithm off and a simple loop to calls send()
function inside the loop.
/*
* Phase 2: concat_p can be concatenated onto last_unsent->p, unless we
* determined that the last ROM pbuf can be extended to include the new
data.
*/
if (concat_p != NULL) {
LWIP_ASSERT("tcp_write: cannot concatenate when pcb->unsent is empty",
(last_unsent != NULL));
pbuf_cat(last_unsent->p, concat_p);
last_unsent->len += concat_p->tot_len;
}
2) The application uses two Ethernets and I do not believe there are any
threading issues
- E0_rx interrupt just posts a counting semahore
- Likewise, E1_rx posts a different E1_cnt_sem
- The two sleeping tasks for each ethernet, namely E0_rx_task and E1_rx_task,
take the semaphore
- Sleeping tasks read their own Ethernet descriptor, pull a pbuf_alloc() and
pass it to the LWIP using the input function pointer of their own interface:
e0_interface.input(pbuf, e0_interface)
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- [lwip-devel] [bug #51033] LWIP_ASSERT while doing repetitive transmission, preet, 2017/05/15
- [lwip-devel] [bug #51033] LWIP_ASSERT while doing repetitive transmission, preet, 2017/05/15
- [lwip-devel] [bug #51033] LWIP_ASSERT while doing repetitive transmission, preet, 2017/05/15
- [lwip-devel] [bug #51033] LWIP_ASSERT while doing repetitive transmission, preet, 2017/05/15
- [lwip-devel] [bug #51033] LWIP_ASSERT while doing repetitive transmission, Simon Goldschmidt, 2017/05/16
- [lwip-devel] [bug #51033] LWIP_ASSERT while doing repetitive transmission,
preet <=
- [lwip-devel] [bug #51033] LWIP_ASSERT while doing repetitive transmission, Simon Goldschmidt, 2017/05/16
- [lwip-devel] [bug #51033] LWIP_ASSERT while doing repetitive transmission, preet, 2017/05/16
- [lwip-devel] [bug #51033] LWIP_ASSERT while doing repetitive transmission, Fayek, 2017/05/17
- [lwip-devel] [bug #51033] LWIP_ASSERT while doing repetitive transmission, preet, 2017/05/17
- [lwip-devel] [bug #51033] LWIP_ASSERT while doing repetitive transmission, Simon Goldschmidt, 2017/05/18