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Re: [lwip-users] TCP Dup ACKs and TCP Window full

From: address@hidden
Subject: Re: [lwip-users] TCP Dup ACKs and TCP Window full
Date: Tue, 10 Apr 2018 21:40:21 +0200
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0

On 10.04.2018 16:53, Adrian Figueroa wrote:
[..]I think, this problem is not caused by Lwip itself but probably a configuration error or some buffer that runs full. Maybe even a speed issue of the processor.
I think it's a processor speed issue. Lost packets could be an lwIP configuration issue (have a look at 'lwip_stats.mem' and 'lwip_stats.memp' to check the 'err' counters). But 'TCP window full' just means the PC sends faster than the device can handle.

I managed to run iPerf with ~100 mbit/s on an STM32 (with STM HAL drivers fixed/improved by myself), but I don't remember the CPU speed... It could also be a driver issue, but I think the ChibiOS drivers are better than the STM HAL ones..


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