diff options
Diffstat (limited to 'host/lib/usrp/x300/x300_impl.hpp')
| -rw-r--r-- | host/lib/usrp/x300/x300_impl.hpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/host/lib/usrp/x300/x300_impl.hpp b/host/lib/usrp/x300/x300_impl.hpp index 80f3e8faa..27f20fbd9 100644 --- a/host/lib/usrp/x300/x300_impl.hpp +++ b/host/lib/usrp/x300/x300_impl.hpp @@ -63,7 +63,11 @@ static const size_t X300_RX_SW_BUFF_SIZE_ETH_MACOS = 0x100000; //1Mib static const double X300_RX_SW_BUFF_FULL_FACTOR = 0.90; //Buffer should ideally be 90% full. static const size_t X300_RX_FC_REQUEST_FREQ = 32; //per flow-control window -static const size_t X300_PCIE_DATA_FRAME_SIZE = 8192; //bytes +//The FIFO closest to the DMA controller is 1023 elements deep for RX and 1029 elements deep for TX +//where an element is 8 bytes. For best throughput ensure that the data frame fits in these buffers. +//Also ensure that the kernel has enough frames to hold buffered TX and RX data +static const size_t X300_PCIE_RX_DATA_FRAME_SIZE = 8184; //bytes +static const size_t X300_PCIE_TX_DATA_FRAME_SIZE = 8192; //bytes static const size_t X300_PCIE_DATA_NUM_FRAMES = 2048; static const size_t X300_PCIE_MSG_FRAME_SIZE = 256; //bytes static const size_t X300_PCIE_MSG_NUM_FRAMES = 32; |