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//
// Copyright 2010-2011 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/multi_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::multi_usrp::sptr usrp,
double rx_rate_sps,
double duration_secs
){
const size_t max_samps_per_packet = usrp->get_device()->get_max_recv_samps_per_packet();
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(max_samps_per_packet);
//flush the buffers in the recv path
while(usrp->get_device()->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;
usrp->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
do {
size_t num_rx_samps = usrp->get_device()->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 << "Error code: " << md.error_code << std::endl;
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;
}
double approx_lost_samps = rx_rate_sps*(md.time_spec - next_expected_time_spec).get_real_secs();
total_lost_samples += std::max(0, boost::math::iround(approx_lost_samps));
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));
usrp->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)/max_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 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>(&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;
}
//verify that rate was specified
if (not vm.count("rate")){
std::cerr << "Please specify the sample rate with --rate" << std::endl;
return ~0;
}
//create a usrp device
std::cout << std::endl;
uhd::device_addrs_t device_addrs = uhd::device::find(args);
if (device_addrs.empty()){
std::cerr << "Could not find any devices for: " << args << std::endl;
return ~0;
}
if (device_addrs.at(0).get("type", "") == "usrp1"){
std::cerr << "*** Warning! ***" << std::endl;
std::cerr << "Benchmark RX results will be inaccurate on USRP1 due to soft-time control.\n" << std::endl;
}
std::cout << boost::format("Creating the usrp device with: %s...") % args << std::endl;
uhd::usrp::multi_usrp::sptr usrp = uhd::usrp::multi_usrp::make(device_addrs.at(0));
std::cout << boost::format("Using Device: %s") % usrp->get_pp_string() << std::endl;
//start the test
usrp->set_rx_rate(rate);
rate = usrp->get_rx_rate();
test_device(usrp, rate, duration);
//finished
std::cout << std::endl << "Done!" << std::endl << std::endl;
return 0;
}
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