Using the M52235EVB I have performed 2 benchmark tests using our uTasker project.
The first is to test a low power task which controls the switching of the processor to a stop state whenever this is possible.
The second is a UDP echo test of 512 and 1024 byte packets with a buffer copy in the middle. Then depending on the project configuration, the memory copies are performed using the DMA controller and / or tight loops and calculations are performed in SRAM rather than directly in FLASH. The reaction times were measured for various steps in the process and also the code/SRAM implicatiosn of each solution were monitored.
We develop Industrial Terminals and Controllers of various flavours - and at the moment I am doing the final evaluation on the M5223x chip, spesifically around a subset of 802.3 we use in communicationg from the terminals to the Master Controller.
We are using Embedded Forth ( SwiftX from Forth Inc) and I would like to replicate your tests using our version of UDP within Forth kernel.
The silly season is upon us, and I will look into this early in the new year.