diff options
Diffstat (limited to 'host/lib')
| -rw-r--r-- | host/lib/transport/udp_wsa_zero_copy.cpp | 79 |
1 files changed, 77 insertions, 2 deletions
diff --git a/host/lib/transport/udp_wsa_zero_copy.cpp b/host/lib/transport/udp_wsa_zero_copy.cpp index 031d26374..23ccf7975 100644 --- a/host/lib/transport/udp_wsa_zero_copy.cpp +++ b/host/lib/transport/udp_wsa_zero_copy.cpp @@ -276,6 +276,34 @@ public: size_t get_num_send_frames(void) const {return _num_send_frames;} size_t get_send_frame_size(void) const {return _send_frame_size;} + //! Read back the socket's buffer space reserved for receives + size_t get_recv_buff_size(void) { + int recv_buff_size = 0; + getsockopt( + _sock_fd, + SOL_SOCKET, + SO_RCVBUF, + (const char *)&recv_buff_size, + sizeof(recv_buff_size) + ); + + return (size_t) recv_buff_size; + } + + //! Read back the socket's buffer space reserved for sends + size_t get_send_buff_size(void) { + int send_buff_size = 0; + getsockopt( + _sock_fd, + SOL_SOCKET, + SO_SNDBUF, + (const char *)&send_buff_size, + sizeof(send_buff_size) + ); + + return (size_t) send_buff_size; + } + private: //memory management -> buffers and fifos const size_t _recv_frame_size, _num_recv_frames; @@ -292,6 +320,25 @@ private: /*********************************************************************** * UDP zero copy make function **********************************************************************/ +void check_usr_buff_size( + size_t actual_buff_size, + size_t user_buff_size, // Set this to zero for no user-defined preference + const std::string tx_rx +){ + UHD_LOG << boost::format( + "Target %s sock buff size: %d bytes\n" + "Actual %s sock buff size: %d bytes" + ) % tx_rx % user_buff_size % tx_rx % actual_buff_size << std::endl; + if ((user_buff_size != 0.0) and (actual_buff_size < user_buff_size)) UHD_MSG(warning) << boost::format( + "The %s buffer could not be resized sufficiently.\n" + "Target sock buff size: %d bytes.\n" + "Actual sock buff size: %d bytes.\n" + "See the transport application notes on buffer resizing.\n%s" + ) % tx_rx % user_buff_size % actual_buff_size; +} + + + udp_zero_copy::sptr udp_zero_copy::make( const std::string &addr, const std::string &port, @@ -306,6 +353,34 @@ udp_zero_copy::sptr udp_zero_copy::make( xport_params.num_recv_frames = size_t(hints.cast<double>("num_recv_frames", default_buff_args.num_recv_frames)); xport_params.send_frame_size = size_t(hints.cast<double>("send_frame_size", default_buff_args.send_frame_size)); xport_params.num_send_frames = size_t(hints.cast<double>("num_send_frames", default_buff_args.num_send_frames)); - - return sptr(new udp_zero_copy_wsa_impl(addr, port, xport_params, hints)); + + //extract buffer size hints from the device addr and check if they match up + size_t usr_recv_buff_size = size_t(hints.cast<double>("recv_buff_size", 0.0)); + size_t usr_send_buff_size = size_t(hints.cast<double>("send_buff_size", 0.0)); + if (hints.has_key("recv_buff_size")) { + if (usr_recv_buff_size < xport_params.recv_frame_size * xport_params.num_recv_frames) { + throw uhd::value_error((boost::format( + "recv_buff_size must be equal to or greater than (num_recv_frames * recv_frame_size) where num_recv_frames=%d, recv_frame_size=%d") + % xport_params.num_recv_frames % xport_params.recv_frame_size).str()); + } + } + if (hints.has_key("send_buff_size")) { + if (usr_send_buff_size < xport_params.send_frame_size * xport_params.num_send_frames) { + throw uhd::value_error((boost::format( + "send_buff_size must be equal to or greater than (num_send_frames * send_frame_size) where num_send_frames=%d, send_frame_size=%d") + % xport_params.num_send_frames % xport_params.send_frame_size).str()); + } + } + + udp_zero_copy_wsa_impl::sptr udp_trans( + new udp_zero_copy_wsa_impl(addr, port, xport_params, hints) + ); + + // Read back the actual socket buffer sizes + buff_params_out.recv_buff_size = udp_trans->get_recv_buff_size(); + buff_params_out.send_buff_size = udp_trans->get_send_buff_size(); + check_usr_buff_size(buff_params_out.recv_buff_size, usr_recv_buff_size, "recv"); + check_usr_buff_size(buff_params_out.send_buff_size, usr_send_buff_size, "send"); + + return udp_trans; } |