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Ethernet throughput using LWIP + FreeRTOS

Question asked by Mayoor Patil on Mar 3, 2020
Latest reply on Mar 18, 2020 by xiangjun.rong

I am testing the ethernet throughput of NxP LPC54018 MCU on OM40003 development board and observing poor throughput.


Environment details:
Tool: MCUXpresso v 11.0.0 build Id 2516


Project details:
Selected MCU LPC54018
Target board not selected
Selected Device package: LPC54018JET180
Operating System: Amazon-FreeRTOS (10.2.0)
Drivers: lpc_enet (2.1.3) in addition to other auto select drivers.
CMSIS Drivers: None
Utilities: None
Middleware: LwIP TCPIP Networking Stack (2.1.2)
Board Components: phylan8720a(1.0.0)
Abstraction Layer: None
Software ComponentsL None
Library Type(and hosting variant): Redlib(none)


With the above settings of the project and referring SDK example project "lpcxpresso54018_lwip_ping_freertos" I created application which sends ICMP ping echo to a target IP address using lwip_sendto( ) API in while loop.

The time taken for lwip_sendto() to execute and come out for next call in loop is more than 20 milliseconds as can be seen from wireshark logs in the screenshot and also when I measured using timer.


Any suggestions on what settings are required for achieving best througput?


With Regards