Ext Flash w/ QSPI seems like it is not benefitting as much from the cache for some reason.
I am using STM32F7508-DK and using Ext Flash connected to QSPI. It is mapped to 0x90000000~ region which is by default covered with cache, but for some reason, it seems like it is not benefitting as much compared to on-chip SRAM or SDRAM connected wi...