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From: | Francisco Expósito |
Subject: | [lwip-users] Degrading performance and etharp proterr |
Date: | Tue, 12 Apr 2016 10:20:01 +0200 |
Hi everyone, I’ve implemented a websocket client that runs on a STM32F4 with FreeRTOS and lwIP 1.4.1. The client is supposed to send the machine status to the server each 5 seconds (plain text message). I let the client run for 2.5 days and the result is the following: - After 2 hours running smoothly, the client starts experiencing delays. For example: it doesn’t send anything during 15 seconds and all of a sudden it sends 3 status messages in a 1 second period. - Things get worse until server raises a timeout and disconnects the client because it is not able to send anything in a 30 second period. - The client is able to reconnect, but (since delays persist) it is disconnected again by the server. I’ve got a ~ 12 hour period of connection/delay/disconnection. - After this period of instability, I’ve got a ~ 12 hour period during which everything runs smoothly (status messages are delivered each 5 seconds). - And so on so forth. I logged everything: OS tasks memory and CPU consumption and LWIP stats. Everything seems to be fine: - OS tasks don’t run out of memory and CPU consumption is under control. - All lwIP memory indicators are below the “available” marker and they have no errors triggered. - lwIP sys indicators remain below the maximum level and no errors are triggered. - The only thing that points to an error is the ETHARP log: o XMIT remains stable at 5. o RECV counter increases until 65.461 and then drops to 0 (I assume it is a 16 bit counter). o CACHEHIT increases linearly. o PROTERR gets regularly incremented until a final value of 28. Any clues anyone? Thank you very much! Fran |
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