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-rw-r--r--host/examples/benchmark_rx_rate.cpp160
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diff --git a/host/examples/benchmark_rx_rate.cpp b/host/examples/benchmark_rx_rate.cpp
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+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include <uhd/utils/thread_priority.hpp>
+#include <uhd/utils/safe_main.hpp>
+#include <uhd/usrp/single_usrp.hpp>
+#include <boost/math/special_functions/round.hpp>
+#include <boost/program_options.hpp>
+#include <boost/format.hpp>
+#include <iostream>
+#include <complex>
+
+namespace po = boost::program_options;
+
+static inline void test_device(
+ uhd::usrp::single_usrp::sptr sdev,
+ double rx_rate_sps,
+ double duration_secs
+){
+ uhd::device::sptr dev = sdev->get_device();
+ std::cout << boost::format("Testing receive rate %f Msps (%f second run)") % (rx_rate_sps/1e6) % duration_secs << std::endl;
+
+ //allocate recv buffer and metatdata
+ uhd::rx_metadata_t md;
+ std::vector<std::complex<float> > buff(dev->get_max_recv_samps_per_packet());
+
+ //flush the buffers in the recv path
+ while(dev->recv(
+ &buff.front(), buff.size(), md,
+ uhd::io_type_t::COMPLEX_FLOAT32,
+ uhd::device::RECV_MODE_ONE_PACKET
+ )){
+ /* NOP */
+ };
+
+ //declare status variables
+ bool got_first_packet = false;
+ size_t total_recv_packets = 0;
+ size_t total_lost_samples = 0;
+ size_t total_recv_samples = 0;
+ uhd::time_spec_t initial_time_spec;
+ uhd::time_spec_t next_expected_time_spec;
+
+ sdev->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
+ do {
+ size_t num_rx_samps = dev->recv(
+ &buff.front(), buff.size(), md,
+ uhd::io_type_t::COMPLEX_FLOAT32,
+ uhd::device::RECV_MODE_ONE_PACKET
+ );
+
+ //handle the error codes
+ switch(md.error_code){
+ case uhd::rx_metadata_t::ERROR_CODE_NONE:
+ case uhd::rx_metadata_t::ERROR_CODE_OVERFLOW:
+ break;
+
+ default:
+ std::cerr << "Unexpected error on recv, exit test..." << std::endl;
+ return;
+ }
+
+ if (not md.has_time_spec){
+ std::cerr << "Metadata missing time spec, exit test..." << std::endl;
+ return;
+ }
+
+ total_recv_samples += num_rx_samps;
+ total_recv_packets++;
+
+ if (not got_first_packet){
+ initial_time_spec = md.time_spec;
+ next_expected_time_spec = initial_time_spec;
+ got_first_packet = true;
+ }
+
+ total_lost_samples += boost::math::iround(rx_rate_sps*(md.time_spec - next_expected_time_spec).get_real_secs());
+ next_expected_time_spec = md.time_spec + uhd::time_spec_t(0, num_rx_samps, rx_rate_sps);
+
+ } while((next_expected_time_spec - initial_time_spec) < uhd::time_spec_t(duration_secs));
+ sdev->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
+
+ //print a summary
+ std::cout << std::endl; //go to newline, recv may spew SXSYSZ...
+ std::cout << boost::format(" Received packets: %d") % total_recv_packets << std::endl;
+ std::cout << boost::format(" Received samples: %d") % total_recv_samples << std::endl;
+ std::cout << boost::format(" Lost samples: %d") % total_lost_samples << std::endl;
+ size_t packets_lost = boost::math::iround(double(total_lost_samples)/dev->get_max_recv_samps_per_packet());
+ std::cout << boost::format(" Lost packets: %d (approximate)") % packets_lost << std::endl;
+ double actual_rx_rate_sps = (total_recv_samples*rx_rate_sps)/(total_recv_samples+total_lost_samples);
+ std::cout << boost::format(" Sustained receive rate: %f Msps") % (actual_rx_rate_sps/1e6) << std::endl;
+ std::cout << std::endl << std::endl;
+}
+
+int UHD_SAFE_MAIN(int argc, char *argv[]){
+ uhd::set_thread_priority_safe();
+
+ //variables to be set by po
+ std::string args;
+ double duration;
+ double only_rate;
+
+ //setup the program options
+ po::options_description desc("Allowed options");
+ desc.add_options()
+ ("help", "help message")
+ ("args", po::value<std::string>(&args)->default_value(""), "single uhd device address args")
+ ("duration", po::value<double>(&duration)->default_value(10.0), "duration for each test in seconds")
+ ("rate", po::value<double>(&only_rate), "specify to perform a single test as this rate (sps)")
+ ;
+ po::variables_map vm;
+ po::store(po::parse_command_line(argc, argv, desc), vm);
+ po::notify(vm);
+
+ //print the help message
+ if (vm.count("help")){
+ std::cout << boost::format("UHD Benchmark RX Rate %s") % desc << std::endl;
+ return ~0;
+ }
+
+ //create a usrp device
+ std::cout << std::endl;
+ std::cout << boost::format("Creating the usrp device with: %s...") % args << std::endl;
+ uhd::usrp::single_usrp::sptr sdev = uhd::usrp::single_usrp::make(args);
+ std::cout << boost::format("Using Device: %s") % sdev->get_pp_string() << std::endl;
+
+ if (not vm.count("rate")){
+ sdev->set_rx_rate(500e3); //initial rate
+ while(true){
+ double rate = sdev->get_rx_rate();
+ test_device(sdev, rate, duration);
+ sdev->set_rx_rate(rate*2); //double the rate
+ if (sdev->get_rx_rate() == rate) break;
+ }
+ }
+ else{
+ sdev->set_rx_rate(only_rate);
+ double rate = sdev->get_rx_rate();
+ test_device(sdev, rate, duration);
+ }
+
+ //finished
+ std::cout << std::endl << "Done!" << std::endl << std::endl;
+
+ return 0;
+}