We do damtest on TX2 to do mem2mem copy.
https://devtalk.nvidia.com/default/topic/1049545/jetson-tx2/how-to-using-gpc-dma-mem2mem-function/
Our test command is:
sudo insmod dmatest channel=dma1chan9 timeout=2000 iterations=1 run=1 test_buf_size=737280 verbose=1 noverify=1
Result is:
[ 1542.192028] dma1chan9-copy0: summary 1 tests, 0 failures 299 iops 215568 KB/s (0)
Seems the mem2mem performance doesn’t meet our expect.
Can we apply dma burst feature for mem2mem, and how?
What is the max mem2mem dma performance we can catch?