On 14-11-20, 11:55, Sugar Zhang wrote: > Actually, burst size is equal to '1 << desc->rqcfg.brst_size'. > we should use burst size, not desc->rqcfg.brst_size. > > dma memcpy performance on Rockchip RV1126 > @ 1512MHz A7, 1056MHz LPDDR3, 200MHz DMA: > > dmatest: > > /# echo dma0chan0 > /sys/module/dmatest/parameters/channel > /# echo 4194304 > /sys/module/dmatest/parameters/test_buf_size > /# echo 8 > /sys/module/dmatest/parameters/iterations > /# echo y > /sys/module/dmatest/parameters/norandom > /# echo y > /sys/module/dmatest/parameters/verbose > /# echo 1 > /sys/module/dmatest/parameters/run > > dmatest: dma0chan0-copy0: result #1: 'test passed' with src_off=0x0 dst_off=0x0 len=0x400000 > dmatest: dma0chan0-copy0: result #2: 'test passed' with src_off=0x0 dst_off=0x0 len=0x400000 > dmatest: dma0chan0-copy0: result #3: 'test passed' with src_off=0x0 dst_off=0x0 len=0x400000 > dmatest: dma0chan0-copy0: result #4: 'test passed' with src_off=0x0 dst_off=0x0 len=0x400000 > dmatest: dma0chan0-copy0: result #5: 'test passed' with src_off=0x0 dst_off=0x0 len=0x400000 > dmatest: dma0chan0-copy0: result #6: 'test passed' with src_off=0x0 dst_off=0x0 len=0x400000 > dmatest: dma0chan0-copy0: result #7: 'test passed' with src_off=0x0 dst_off=0x0 len=0x400000 > dmatest: dma0chan0-copy0: result #8: 'test passed' with src_off=0x0 dst_off=0x0 len=0x400000 > > Before: > > dmatest: dma0chan0-copy0: summary 8 tests, 0 failures 48 iops 200338 KB/s (0) > > After this patch: > > dmatest: dma0chan0-copy0: summary 8 tests, 0 failures 179 iops 734873 KB/s (0) > > After this patch and increase dma clk to 400MHz: > > dmatest: dma0chan0-copy0: summary 8 tests, 0 failures 259 iops 1062929 KB/s (0) Applied, thanks -- ~Vinod
