diff options
Diffstat (limited to 'host/lib')
| -rw-r--r-- | host/lib/transport/super_send_packet_handler.hpp | 102 |
1 files changed, 77 insertions, 25 deletions
diff --git a/host/lib/transport/super_send_packet_handler.hpp b/host/lib/transport/super_send_packet_handler.hpp index 02cfad80f..8f943effb 100644 --- a/host/lib/transport/super_send_packet_handler.hpp +++ b/host/lib/transport/super_send_packet_handler.hpp @@ -23,6 +23,8 @@ #include <uhd/convert.hpp> #include <uhd/stream.hpp> #include <uhd/utils/msg.hpp> +#include <uhd/utils/tasks.hpp> +#include <uhd/utils/atomic.hpp> #include <uhd/utils/byteswap.hpp> #include <uhd/types/metadata.hpp> #include <uhd/transport/vrt_if_packet.hpp> @@ -58,12 +60,23 @@ public: this->resize(size); } + ~send_packet_handler(void){ + _task_handlers.clear(); + } + //! Resize the number of transport channels void resize(const size_t size){ if (this->size() == size) return; + _task_handlers.clear(); _props.resize(size); static const boost::uint64_t zero = 0; _zero_buffs.resize(size, &zero); + _task_barrier_entry.resize(size); + _task_barrier_exit.resize(size); + _task_handlers.resize(size); + for (size_t i = 1/*skip 0*/; i < size; i++){ + _task_handlers[i] = task::make(boost::bind(&send_packet_handler::converter_thread_task, this, i)); + }; } //! Get the channel width of this handler @@ -104,7 +117,7 @@ public: //! Set the conversion routine for all channels void set_converter(const uhd::convert::id_type &id){ - _io_buffs.resize(id.num_inputs); + _num_inputs = id.num_inputs; _converter = uhd::convert::get_converter(id)(); this->set_scale_factor(32767.); //update after setting converter _bytes_per_otw_item = uhd::convert::get_bytes_per_item(id.output_format); @@ -205,9 +218,10 @@ private: get_buff_type get_buff; bool has_sid; boost::uint32_t sid; + managed_send_buffer::sptr buff; }; std::vector<xport_chan_props_type> _props; - std::vector<const void *> _io_buffs; //used in conversion + size_t _num_inputs; size_t _bytes_per_otw_item; //used in conversion size_t _bytes_per_cpu_item; //used in conversion uhd::convert::converter::sptr _converter; //used in conversion @@ -226,39 +240,77 @@ private: const size_t buffer_offset_bytes = 0 ){ //load the rest of the if_packet_info in here - if_packet_info.num_payload_bytes = nsamps_per_buff*_io_buffs.size()*_bytes_per_otw_item; + if_packet_info.num_payload_bytes = nsamps_per_buff*_num_inputs*_bytes_per_otw_item; if_packet_info.num_payload_words32 = (if_packet_info.num_payload_bytes + 3/*round up*/)/sizeof(boost::uint32_t); if_packet_info.packet_count = _next_packet_seq; - size_t buff_index = 0; + //get a buffer for each channel or timeout BOOST_FOREACH(xport_chan_props_type &props, _props){ - managed_send_buffer::sptr buff = props.get_buff(timeout); - if (buff.get() == NULL) return 0; //timeout - - //fill a vector with pointers to the io buffers - BOOST_FOREACH(const void *&io_buff, _io_buffs){ - io_buff = reinterpret_cast<const char *>(buffs[buff_index++]) + buffer_offset_bytes; - } - boost::uint32_t *otw_mem = buff->cast<boost::uint32_t *>() + _header_offset_words32; - - //pack metadata into a vrt header - if_packet_info.has_sid = props.has_sid; - if_packet_info.sid = props.sid; - _vrt_packer(otw_mem, if_packet_info); - otw_mem += if_packet_info.num_header_words32; + if (not props.buff) props.buff = props.get_buff(timeout); + if (not props.buff) return 0; //timeout + } - //copy-convert the samples into the send buffer - _converter->conv(_io_buffs, otw_mem, nsamps_per_buff); + //setup the data to share with converter threads + _convert_nsamps = nsamps_per_buff; + _convert_buffs = &buffs; + _convert_buffer_offset_bytes = buffer_offset_bytes; + _convert_if_packet_info = &if_packet_info; - //commit the samples to the zero-copy interface - size_t num_bytes_total = (_header_offset_words32+if_packet_info.num_packet_words32)*sizeof(boost::uint32_t); - buff->commit(num_bytes_total); - buff.reset(); //effectively a release + //perform N channels of conversion + converter_thread_task(0); - } _next_packet_seq++; //increment sequence after commits return nsamps_per_buff; } + + /******************************************************************* + * Perform one thread's work of the conversion task. + * The entry and exit use a dual synchronization barrier, + * to wait for data to become ready and block until completion. + ******************************************************************/ + UHD_INLINE void converter_thread_task(const size_t index) + { + _task_barrier_entry.wait(); + + //shortcut references to local data structures + managed_send_buffer::sptr &buff = _props[index].buff; + vrt::if_packet_info_t if_packet_info = *_convert_if_packet_info; + const tx_streamer::buffs_type &buffs = *_convert_buffs; + + //fill IO buffs with pointers into the output buffer + const void *io_buffs[4/*max interleave*/]; + for (size_t i = 0; i < _num_inputs; i++){ + const char *b = reinterpret_cast<const char *>(buffs[index*_num_inputs + i]); + io_buffs[i] = b + _convert_buffer_offset_bytes; + } + const ref_vector<const void *> in_buffs(io_buffs, _num_inputs); + + //pack metadata into a vrt header + boost::uint32_t *otw_mem = buff->cast<boost::uint32_t *>() + _header_offset_words32; + if_packet_info.has_sid = _props[index].has_sid; + if_packet_info.sid = _props[index].sid; + _vrt_packer(otw_mem, if_packet_info); + otw_mem += if_packet_info.num_header_words32; + + //perform the conversion operation + _converter->conv(in_buffs, otw_mem, _convert_nsamps); + + //commit the samples to the zero-copy interface + const size_t num_vita_words32 = _header_offset_words32+if_packet_info.num_packet_words32; + buff->commit(num_vita_words32*sizeof(boost::uint32_t)); + buff.reset(); //effectively a release + + _task_barrier_exit.wait(); + } + + //! Shared variables for the worker threads + reusable_barrier _task_barrier_entry, _task_barrier_exit; + std::vector<task::sptr> _task_handlers; + size_t _convert_nsamps; + const tx_streamer::buffs_type *_convert_buffs; + size_t _convert_buffer_offset_bytes; + vrt::if_packet_info_t *_convert_if_packet_info; + }; class send_packet_streamer : public send_packet_handler, public tx_streamer{ |