Ex. 4: DMA / TL-UL host implementation

Group: rvlab01

1. Source texts

See Appendix

2. Wave views

memcpy_hard

The cursors show where the write request completes.

\newpage

memcpy_soft

The transfer of one word happens between the two cursors.

3. Benchmarking results

operation	software [cycles]	hardware [cycles]	ratio
memset of 1kB in SRAM	2836	584	4.856
memset of 1kB in DDR3	2976	1813	1.641
memcpy of 1kB SRAM to SRAM	3347	1095	3.057
memcpy of 1kB DDR3 to SRAM	3428	2201	1.557

Appendix:

• student_dma.sv

• dma/memcpy.c

• dma/main.c