On 13-01-21, 13:49, Peter Ujfalusi wrote: > Hi, > > Changes since v1: > - Added Kishon's tested-by to the first two patch > - Moved the variable definitions to the start of their respective functions > - Remove braces where they are not needed > - correct indentation of cases > - additional patch to clean up the ret = 0 initializations in tisci channel configuration > functions, no functional changes. > > Newer members of the KS3 family (after AM654) have support for burst_size > configuration for each DMA channel. > > The HW default value is 64 bytes but on higher throughput channels it can be > increased to 256 bytes (UCHANs) or 128 byes (HCHANs). > > Aligning the buffers and length of the transfer to the burst size also increases > the throughput. > > Numbers gathered on j721e (UCHAN pair): > echo 8000000 > /sys/module/dmatest/parameters/test_buf_size > echo 2000 > /sys/module/dmatest/parameters/timeout > echo 50 > /sys/module/dmatest/parameters/iterations > echo 1 > /sys/module/dmatest/parameters/max_channels > > Prior to this patch: ~1.3 GB/s > After this patch: ~1.8 GB/s > with 1 byte alignment: ~1.7 GB/s Applied, thanks -- ~Vinod
