/***********************************************************************
* RX Hammer
**********************************************************************/
void rx_hammer(uhd::usrp::multi_usrp::sptr usrp, const std::string &rx_cpu, uhd::rx_streamer::sptr rx_stream){
uhd::set_thread_priority_safe();
//print pre-test summary
std::cout << boost::format(
"Testing receive rate %f Msps"
) % (usrp->get_rx_rate()/1e6) << std::endl;
//setup variables and allocate buffer
uhd::rx_metadata_t md;
const size_t max_samps_per_packet = rx_stream->get_max_num_samps();
std::vector<char> buff(max_samps_per_packet*uhd::convert::get_bytes_per_item(rx_cpu));
std::vector<void *> buffs;
for (size_t ch = 0; ch < rx_stream->get_num_channels(); ch++)
buffs.push_back(&buff.front()); //same buffer for each channel
bool had_an_overflow = false;
uhd::time_spec_t last_time;
const double rate = usrp->get_rx_rate();
double timeout = 1;
uhd::stream_cmd_t cmd(uhd::stream_cmd_t::STREAM_MODE_NUM_SAMPS_AND_DONE);
cmd.time_spec = usrp->get_time_now() + uhd::time_spec_t(0.05);
cmd.stream_now = (buffs.size() == 1);
srand( time(NULL) );
while (not boost::this_thread::interruption_requested()){
cmd.num_samps = rand() % 100000;
rx_stream->issue_stream_cmd(cmd);
num_rx_samps += rx_stream->recv(buffs, max_samps_per_packet, md, timeout, true);
//handle the error codes
switch(md.error_code){
case uhd::rx_metadata_t::ERROR_CODE_NONE:
if (had_an_overflow){
had_an_overflow = false;
num_dropped_samps += boost::math::iround((md.time_spec - last_time).get_real_secs()*rate);
}
break;
case uhd::rx_metadata_t::ERROR_CODE_OVERFLOW:
had_an_overflow = true;
last_time = md.time_spec;
if (!md.out_of_sequence)
num_overflows++;
break;
default:
std::cerr << "Receiver error: " << md.strerror() << std::endl;
std::cerr << "Unexpected error on recv, continuing..." << std::endl;
break;
}
}
}
/*!
* Test the broken chain message:
* Issue a stream command with num samps and more.
* We expect to get an inline broken chain message.
*/
bool test_broken_chain_message(UHD_UNUSED(uhd::usrp::multi_usrp::sptr usrp), uhd::rx_streamer::sptr rx_stream, uhd::tx_streamer::sptr){
std::cout << "Test broken chain message... " << std::flush;
uhd::stream_cmd_t stream_cmd(uhd::stream_cmd_t::STREAM_MODE_NUM_SAMPS_AND_MORE);
stream_cmd.stream_now = true;
stream_cmd.num_samps = rx_stream->get_max_num_samps();
rx_stream->issue_stream_cmd(stream_cmd);
std::vector<std::complex<float> > buff(rx_stream->get_max_num_samps());
uhd::rx_metadata_t md;
rx_stream->recv( //once for the requested samples
&buff.front(), buff.size(), md
);
rx_stream->recv( //again for the inline message
&buff.front(), buff.size(), md
);
switch(md.error_code){
case uhd::rx_metadata_t::ERROR_CODE_BROKEN_CHAIN:
std::cout << boost::format(
"success:\n"
" Got error code broken chain message.\n"
) << std::endl;
return true;
case uhd::rx_metadata_t::ERROR_CODE_TIMEOUT:
std::cout << boost::format(
"failed:\n"
" Inline message recv timed out.\n"
) << std::endl;
return false;
default:
std::cout << boost::format(
"failed:\n"
" Got unexpected error code 0x%x.\n"
) % md.error_code << std::endl;
return false;
}
}
/*!
* Test the late command message:
* Issue a stream command with a time that is in the past.
* We expect to get an inline late command message.
*/
bool test_late_command_message(uhd::usrp::multi_usrp::sptr usrp, uhd::rx_streamer::sptr rx_stream, uhd::tx_streamer::sptr){
std::cout << "Test late command message... " << std::flush;
usrp->set_time_now(uhd::time_spec_t(200.0)); //set time
uhd::stream_cmd_t stream_cmd(uhd::stream_cmd_t::STREAM_MODE_NUM_SAMPS_AND_DONE);
stream_cmd.num_samps = rx_stream->get_max_num_samps();
stream_cmd.stream_now = false;
stream_cmd.time_spec = uhd::time_spec_t(100.0); //time in the past
rx_stream->issue_stream_cmd(stream_cmd);
std::vector<std::complex<float> > buff(rx_stream->get_max_num_samps());
uhd::rx_metadata_t md;
const size_t nsamps = rx_stream->recv(
&buff.front(), buff.size(), md
);
switch(md.error_code){
case uhd::rx_metadata_t::ERROR_CODE_LATE_COMMAND:
std::cout << boost::format(
"success:\n"
" Got error code late command message.\n"
) << std::endl;
return true;
case uhd::rx_metadata_t::ERROR_CODE_TIMEOUT:
std::cout << boost::format(
"failed:\n"
" Inline message recv timed out.\n"
) << std::endl;
return false;
default:
std::cout << boost::format(
"failed:\n"
" Got unexpected error code 0x%x, nsamps %u.\n"
) % md.error_code % nsamps << std::endl;
return false;
}
}
void recv_to_file(uhd::rx_streamer::sptr rx_stream,
const std::string& file,
const size_t samps_per_buff,
const double rx_rate,
const unsigned long long num_requested_samples,
double time_requested = 0.0,
bool bw_summary = false,
bool stats = false,
bool enable_size_map = false,
bool continue_on_bad_packet = false)
{
unsigned long long num_total_samps = 0;
uhd::rx_metadata_t md;
std::vector<samp_type> buff(samps_per_buff);
std::ofstream outfile;
if (not file.empty()) {
outfile.open(file.c_str(), std::ofstream::binary);
}
bool overflow_message = true;
// setup streaming
uhd::stream_cmd_t stream_cmd((num_requested_samples == 0)
? uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS
: uhd::stream_cmd_t::STREAM_MODE_NUM_SAMPS_AND_DONE);
stream_cmd.num_samps = size_t(num_requested_samples);
stream_cmd.stream_now = true;
stream_cmd.time_spec = uhd::time_spec_t();
std::cout << "Issuing stream cmd" << std::endl;
rx_stream->issue_stream_cmd(stream_cmd);
const auto start_time = std::chrono::steady_clock::now();
const auto stop_time =
start_time + std::chrono::milliseconds(int64_t(1000 * time_requested));
// Track time and samps between updating the BW summary
auto last_update = start_time;
unsigned long long last_update_samps = 0;
typedef std::map<size_t, size_t> SizeMap;
SizeMap mapSizes;
// Run this loop until either time expired (if a duration was given), until
// the requested number of samples were collected (if such a number was
// given), or until Ctrl-C was pressed.
while (not stop_signal_called
and (num_requested_samples != num_total_samps or num_requested_samples == 0)
and (time_requested == 0.0 or std::chrono::steady_clock::now() <= stop_time)) {
const auto now = std::chrono::steady_clock::now();
size_t num_rx_samps =
rx_stream->recv(&buff.front(), buff.size(), md, 3.0, enable_size_map);
if (md.error_code == uhd::rx_metadata_t::ERROR_CODE_TIMEOUT) {
std::cout << boost::format("Timeout while streaming") << std::endl;
break;
}
if (md.error_code == uhd::rx_metadata_t::ERROR_CODE_OVERFLOW) {
if (overflow_message) {
overflow_message = false;
std::cerr
<< boost::format(
"Got an overflow indication. Please consider the following:\n"
" Your write medium must sustain a rate of %fMB/s.\n"
" Dropped samples will not be written to the file.\n"
" Please modify this example for your purposes.\n"
" This message will not appear again.\n")
% (rx_rate * sizeof(samp_type) / 1e6);
}
continue;
}
if (md.error_code != uhd::rx_metadata_t::ERROR_CODE_NONE) {
std::string error = str(boost::format("Receiver error: %s") % md.strerror());
if (continue_on_bad_packet) {
std::cerr << error << std::endl;
continue;
} else
throw std::runtime_error(error);
}
if (enable_size_map) {
SizeMap::iterator it = mapSizes.find(num_rx_samps);
if (it == mapSizes.end())
mapSizes[num_rx_samps] = 0;
mapSizes[num_rx_samps] += 1;
}
num_total_samps += num_rx_samps;
if (outfile.is_open()) {
outfile.write((const char*)&buff.front(), num_rx_samps * sizeof(samp_type));
}
if (bw_summary) {
last_update_samps += num_rx_samps;
const auto time_since_last_update = now - last_update;
if (time_since_last_update > std::chrono::seconds(UPDATE_INTERVAL)) {
const double time_since_last_update_s =
std::chrono::duration<double>(time_since_last_update).count();
const double rate = double(last_update_samps) / time_since_last_update_s;
std::cout << "\t" << (rate / 1e6) << " MSps" << std::endl;
last_update_samps = 0;
last_update = now;
}
}
}
const auto actual_stop_time = std::chrono::steady_clock::now();
stream_cmd.stream_mode = uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS;
std::cout << "Issuing stop stream cmd" << std::endl;
rx_stream->issue_stream_cmd(stream_cmd);
// Run recv until nothing is left
int num_post_samps = 0;
do {
num_post_samps = rx_stream->recv(&buff.front(), buff.size(), md, 3.0);
} while (num_post_samps and md.error_code == uhd::rx_metadata_t::ERROR_CODE_NONE);
if (outfile.is_open())
outfile.close();
if (stats) {
std::cout << std::endl;
const double actual_duration_seconds =
std::chrono::duration<float>(actual_stop_time - start_time).count();
std::cout << boost::format("Received %d samples in %f seconds") % num_total_samps
% actual_duration_seconds
<< std::endl;
const double rate = (double)num_total_samps / actual_duration_seconds;
std::cout << (rate / 1e6) << " MSps" << std::endl;
if (enable_size_map) {
std::cout << std::endl;
std::cout << "Packet size map (bytes: count)" << std::endl;
for (SizeMap::iterator it = mapSizes.begin(); it != mapSizes.end(); it++)
std::cout << it->first << ":\t" << it->second << std::endl;
}
}
}
/***********************************************************************
* Benchmark RX Rate
**********************************************************************/
void benchmark_rx_rate(
uhd::usrp::multi_usrp::sptr usrp,
const std::string &rx_cpu,
uhd::rx_streamer::sptr rx_stream,
bool random_nsamps,
const boost::posix_time::ptime &start_time,
std::atomic<bool>& burst_timer_elapsed
) {
uhd::set_thread_priority_safe();
//print pre-test summary
std::cout << boost::format(
"[%s] Testing receive rate %f Msps on %u channels"
) % NOW() % (usrp->get_rx_rate()/1e6) % rx_stream->get_num_channels() << std::endl;
//setup variables and allocate buffer
uhd::rx_metadata_t md;
const size_t max_samps_per_packet = rx_stream->get_max_num_samps();
std::vector<char> buff(max_samps_per_packet*uhd::convert::get_bytes_per_item(rx_cpu));
std::vector<void *> buffs;
for (size_t ch = 0; ch < rx_stream->get_num_channels(); ch++)
buffs.push_back(&buff.front()); //same buffer for each channel
bool had_an_overflow = false;
uhd::time_spec_t last_time;
const double rate = usrp->get_rx_rate();
uhd::stream_cmd_t cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
cmd.time_spec = usrp->get_time_now() + uhd::time_spec_t(INIT_DELAY);
cmd.stream_now = (buffs.size() == 1);
rx_stream->issue_stream_cmd(cmd);
const float burst_pkt_time =
std::max<float>(0.100f, (2 * max_samps_per_packet/rate));
float recv_timeout = burst_pkt_time + INIT_DELAY;
bool stop_called = false;
while (true) {
//if (burst_timer_elapsed.load(boost::memory_order_relaxed) and not stop_called) {
if (burst_timer_elapsed and not stop_called) {
rx_stream->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
stop_called = true;
}
if (random_nsamps) {
cmd.num_samps = rand() % max_samps_per_packet;
rx_stream->issue_stream_cmd(cmd);
}
try {
num_rx_samps += rx_stream->recv(buffs, max_samps_per_packet, md, recv_timeout)*rx_stream->get_num_channels();
recv_timeout = burst_pkt_time;
}
catch (uhd::io_error &e) {
std::cerr << "[" << NOW() << "] Caught an IO exception. " << std::endl;
std::cerr << e.what() << std::endl;
return;
}
//handle the error codes
switch(md.error_code){
case uhd::rx_metadata_t::ERROR_CODE_NONE:
if (had_an_overflow) {
had_an_overflow = false;
const long dropped_samps =
(md.time_spec - last_time).to_ticks(rate);
if (dropped_samps < 0) {
std::cerr
<< "[" << NOW() << "] Timestamp after overrun recovery "
"ahead of error timestamp! Unable to calculate "
"number of dropped samples."
"(Delta: " << dropped_samps << " ticks)\n";
}
num_dropped_samps += std::max<long>(1, dropped_samps);
}
if ((burst_timer_elapsed or stop_called) and md.end_of_burst) {
return;
}
break;
// ERROR_CODE_OVERFLOW can indicate overflow or sequence error
case uhd::rx_metadata_t::ERROR_CODE_OVERFLOW:
last_time = md.time_spec;
had_an_overflow = true;
// check out_of_sequence flag to see if it was a sequence error or overflow
if (!md.out_of_sequence) {
num_overruns++;
} else {
num_seqrx_errors++;
std::cerr << "[" << NOW() << "] Detected Rx sequence error." << std::endl;
}
break;
case uhd::rx_metadata_t::ERROR_CODE_LATE_COMMAND:
std::cerr << "[" << NOW() << "] Receiver error: " << md.strerror() << ", restart streaming..."<< std::endl;
num_late_commands++;
// Radio core will be in the idle state. Issue stream command to restart streaming.
cmd.time_spec = usrp->get_time_now() + uhd::time_spec_t(0.05);
cmd.stream_now = (buffs.size() == 1);
rx_stream->issue_stream_cmd(cmd);
break;
case uhd::rx_metadata_t::ERROR_CODE_TIMEOUT:
if (burst_timer_elapsed) {
return;
}
std::cerr << "[" << NOW() << "] Receiver error: " << md.strerror() << ", continuing..." << std::endl;
num_timeouts_rx++;
break;
// Otherwise, it's an error
default:
std::cerr << "[" << NOW() << "] Receiver error: " << md.strerror() << std::endl;
std::cerr << "[" << NOW() << "] Unexpected error on recv, continuing..." << std::endl;
break;
}
}
}