I face a performance problem on Embest SABRE Lite board. I suspected a memory bandwidth limitation so I ran bw_mem from lmbench suite.
I have also a Boundary Devices SABRE Lite board. Here are the results with bw_mem -P 1 -N 4 128M what
The tests clearly show memory bandwidth is significantly lower for all use cases.
I have noticed the memory controller settings are different by displaying the register contents with U-Boot. However, both boards have the same Hynix DDR chip Hynix H5TQ2G63DFR with same speed grade H9C.
Does someone have an idea about this?