X300: Change Ethernet buffering

Ethernet buffering is now done so that most of the buffering is done in
the socket buffers and multiple frames are only used to support the
receive side offload of the socket I/O.  Eliminates dropped packets at
high full duplex rates.

1 files changed, 0 insertions, 16 deletions

diff --git a/host/lib/usrp/x300/x300_io_impl.cpp b/host/lib/usrp/x300/x300_io_impl.cpp
index af5aa7c9e..d833b3715 100644
--- a/host/lib/usrp/x300/x300_io_impl.cpp
+++ b/host/lib/usrp/x300/x300_io_impl.cpp
@@ -17,22 +17,6 @@ using namespace uhd::usrp;
 device_addr_t x300_impl::get_rx_hints(size_t mb_index)
 {
     device_addr_t rx_hints = _mb[mb_index].recv_args;
-    // (default to a large recv buff)
-    if (not rx_hints.has_key("recv_buff_size"))
-    {
-        if (_mb[mb_index].xport_path != "nirio") {
-            //For the ethernet transport, the buffer has to be set before creating
-            //the transport because it is independent of the frame size and # frames
-            //For nirio, the buffer size is not configurable by the user
-            #if defined(UHD_PLATFORM_MACOS) || defined(UHD_PLATFORM_BSD)
-                //limit buffer resize on macos or it will error
-                rx_hints["recv_buff_size"] = std::to_string(X300_RX_SW_BUFF_SIZE_ETH_MACOS);
-            #elif defined(UHD_PLATFORM_LINUX) || defined(UHD_PLATFORM_WIN32)
-                //set to half-a-second of buffering at max rate
-                rx_hints["recv_buff_size"] = std::to_string(X300_RX_SW_BUFF_SIZE_ETH);
-            #endif
-        }
-    }
     return rx_hints;
 }