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srsLTE: expanded RLC stress test with the addition of multiple PDU per TTI in reverse order

This commit is contained in:
Xavier Arteaga 2020-01-22 16:27:45 +01:00 committed by Xavier Arteaga
parent 5ae3afd2b8
commit d3537fc340
1 changed files with 106 additions and 42 deletions
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148
lib/test/upper/rlc_stress_test.cc
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@ -78,6 +78,7 @@ typedef struct {
uint32_t test_duration_sec;
float pdu_drop_rate;
float pdu_cut_rate;
float pdu_duplicate_rate;
uint32_t sdu_gen_delay_usec;
uint32_t pdu_tx_delay_usec;
bool reestablish;
@ -88,6 +89,7 @@ typedef struct {
bool random_opp;
bool zero_seed;
bool pedantic_sdu_check;
uint32_t nof_pdu_tti;
} stress_test_args_t;
void parse_args(stress_test_args_t* args, int argc, char* argv[])
@ -103,22 +105,24 @@ void parse_args(stress_test_args_t* args, int argc, char* argv[])
// Command line or config file options
bpo::options_description common("Configuration options");
common.add_options()
("rat", bpo::value<std::string>(&args->rat)->default_value("LTE"), "The RLC version to use (LTE/NR)")
("mode", bpo::value<std::string>(&args->mode)->default_value("AM"), "Whether to test RLC acknowledged or unacknowledged mode (AM/UM)")
("duration", bpo::value<uint32_t>(&args->test_duration_sec)->default_value(5), "Duration (sec)")
("sdu_size", bpo::value<uint32_t>(&args->sdu_size)->default_value(1500), "Size of SDUs")
("avg_opp_size", bpo::value<uint32_t>(&args->avg_opp_size)->default_value(1505), "Size of the MAC opportunity (if not random)")
("random_opp", bpo::value<bool>(&args->random_opp)->default_value(true), "Whether to generate random MAC opportunities")
("sdu_gen_delay", bpo::value<uint32_t>(&args->sdu_gen_delay_usec)->default_value(0), "SDU generation delay (usec)")
("pdu_tx_delay", bpo::value<uint32_t>(&args->pdu_tx_delay_usec)->default_value(0), "Delay in MAC for transfering PDU from tx'ing RLC to rx'ing RLC (usec)")
("pdu_drop_rate", bpo::value<float>(&args->pdu_drop_rate)->default_value(0.1), "Rate at which RLC PDUs are dropped")
("pdu_cut_rate", bpo::value<float>(&args->pdu_cut_rate)->default_value(0.0), "Rate at which RLC PDUs are chopped in length")
("reestablish", bpo::value<bool>(&args->reestablish)->default_value(false), "Mimic RLC reestablish during execution")
("loglevel", bpo::value<uint32_t>(&args->log_level)->default_value(srslte::LOG_LEVEL_DEBUG), "Log level (1=Error,2=Warning,3=Info,4=Debug)")
("singletx", bpo::value<bool>(&args->single_tx)->default_value(false), "If set to true, only one node is generating data")
("pcap", bpo::value<bool>(&args->write_pcap)->default_value(false), "Whether to write all RLC PDU to PCAP file")
("zeroseed", bpo::value<bool>(&args->zero_seed)->default_value(false), "Whether to initialize random seed to zero")
("pedantic", bpo::value<bool>(&args->pedantic_sdu_check)->default_value(false), "Whether to check SDU length and exit on error");
("rat", bpo::value<std::string>(&args->rat)->default_value("LTE"), "The RLC version to use (LTE/NR)")
("mode", bpo::value<std::string>(&args->mode)->default_value("AM"), "Whether to test RLC acknowledged or unacknowledged mode (AM/UM)")
("duration", bpo::value<uint32_t>(&args->test_duration_sec)->default_value(5), "Duration (sec)")
("sdu_size", bpo::value<uint32_t>(&args->sdu_size)->default_value(1500), "Size of SDUs")
("avg_opp_size", bpo::value<uint32_t>(&args->avg_opp_size)->default_value(1505), "Size of the MAC opportunity (if not random)")
("random_opp", bpo::value<bool>(&args->random_opp)->default_value(true), "Whether to generate random MAC opportunities")
("sdu_gen_delay", bpo::value<uint32_t>(&args->sdu_gen_delay_usec)->default_value(0), "SDU generation delay (usec)")
("pdu_tx_delay", bpo::value<uint32_t>(&args->pdu_tx_delay_usec)->default_value(0), "Delay in MAC for transfering PDU from tx'ing RLC to rx'ing RLC (usec)")
("pdu_drop_rate", bpo::value<float>(&args->pdu_drop_rate)->default_value(0.1), "Rate at which RLC PDUs are dropped")
("pdu_cut_rate", bpo::value<float>(&args->pdu_cut_rate)->default_value(0.0), "Rate at which RLC PDUs are chopped in length")
("pdu_duplicate_rate", bpo::value<float>(&args->pdu_duplicate_rate)->default_value(0.0), "Rate at which RLC PDUs are duplicated")
("reestablish", bpo::value<bool>(&args->reestablish)->default_value(false), "Mimic RLC reestablish during execution")
("loglevel", bpo::value<uint32_t>(&args->log_level)->default_value(srslte::LOG_LEVEL_DEBUG), "Log level (1=Error,2=Warning,3=Info,4=Debug)")
("singletx", bpo::value<bool>(&args->single_tx)->default_value(false), "If set to true, only one node is generating data")
("pcap", bpo::value<bool>(&args->write_pcap)->default_value(false), "Whether to write all RLC PDU to PCAP file")
("zeroseed", bpo::value<bool>(&args->zero_seed)->default_value(false), "Whether to initialize random seed to zero")
("pedantic", bpo::value<bool>(&args->pedantic_sdu_check)->default_value(false), "Whether to check SDU length and exit on error")
("nof_pdu_tti", bpo::value<uint32_t>(&args->nof_pdu_tti)->default_value(1), "Number of PDUs processed in a TTI");
// clang-format on
// these options are allowed on the command line
@ -161,7 +165,8 @@ public:
timers(timers_),
log("MAC "),
thread("MAC_DUMMY"),
real_dist(0.0, 1.0)
real_dist(0.0, 1.0),
mt19937(1234)
{
log.set_level(static_cast<LOG_LEVEL_ENUM>(args.log_level));
log.set_hex_limit(LOG_HEX_LIMIT);
@ -174,37 +179,72 @@ public:
}
private:
void run_tti(rlc_interface_mac* tx_rlc, rlc_interface_mac* rx_rlc, bool is_dl)
void run_tx_tti(rlc_interface_mac* tx_rlc, rlc_interface_mac* rx_rlc, std::vector<unique_byte_buffer_t>& pdu_list)
{
byte_buffer_pool* pool = byte_buffer_pool::get_instance();
unique_byte_buffer_t pdu = srslte::allocate_unique_buffer(*pool, __PRETTY_FUNCTION__, true);
if (!pdu) {
printf("Fatal Error: Could not allocate PDU in mac_reader::run_thread\n");
exit(-1);
// Generate A number of MAC PDUs
for (uint32_t i = 0; i < args.nof_pdu_tti; i++) {
// Get PDU pool
byte_buffer_pool* pool = byte_buffer_pool::get_instance();
// Create PDU unique buffer
unique_byte_buffer_t pdu = srslte::allocate_unique_buffer(*pool, __PRETTY_FUNCTION__, true);
if (!pdu) {
printf("Fatal Error: Could not allocate PDU in mac_reader::run_thread\n");
exit(-1);
}
// Get MAC PDU size
float factor = 1.0f;
if (args.random_opp) {
factor = 0.5f + real_dist(mt19937);
}
int opp_size = static_cast<int>(args.avg_opp_size * factor);
// Request data to transmit
uint32_t buf_state = tx_rlc->get_buffer_state(lcid);
if (buf_state > 0) {
int read = tx_rlc->read_pdu(lcid, pdu->msg, opp_size);
pdu->N_bytes = read;
// Push PDU in the list
pdu_list.push_back(std::move(pdu));
}
}
}
void run_rx_tti(rlc_interface_mac* tx_rlc,
rlc_interface_mac* rx_rlc,
bool is_dl,
std::vector<unique_byte_buffer_t>& pdu_list)
{
// Sleep if necessary
if (args.pdu_tx_delay_usec > 0) {
usleep(args.pdu_tx_delay_usec);
}
float factor = 1.0;
if (args.random_opp) {
factor = 0.5 + real_dist(mt19937);
}
int opp_size = args.avg_opp_size * factor;
uint32_t buf_state = tx_rlc->get_buffer_state(lcid);
if (buf_state > 0) {
int read = tx_rlc->read_pdu(lcid, pdu->msg, opp_size);
pdu->N_bytes = read;
if (args.pdu_tx_delay_usec > 0) {
usleep(args.pdu_tx_delay_usec);
}
if ((real_dist(mt19937) > args.pdu_drop_rate) && read > 0) {
auto it = pdu_list.begin(); // PDU iterator
bool skip_action = false; // Avoid discarding a duplicated or duplicating a discarded
while (it != pdu_list.end()) {
// Get PDU unique buffer
unique_byte_buffer_t& pdu = *it;
// Drop
if (((real_dist(mt19937) > args.pdu_drop_rate) || skip_action) && pdu->N_bytes > 0) {
uint32_t pdu_len = pdu->N_bytes;
if ((real_dist(mt19937) > 0.1) && args.pdu_cut_rate) {
int cut_pdu_len = pdu_len * real_dist(mt19937);
log.info("Cutting MAC PDU len (%d B > %d B)\n", pdu_len, cut_pdu_len);
// Cut
if ((real_dist(mt19937) < args.pdu_cut_rate)) {
int cut_pdu_len = static_cast<int>(pdu_len * real_dist(mt19937));
log.info("Cutting MAC PDU len (%d B -> %d B)\n", pdu_len, cut_pdu_len);
pdu_len = cut_pdu_len;
}
rx_rlc->write_pdu(lcid, pdu->msg, pdu_len);
write_pdu_to_pcap(is_dl, 4, pdu->msg, pdu_len);
// Write PDU in RX
rx_rlc->write_pdu(lcid, pdu->msg, pdu_len);
// Write PCAP
write_pdu_to_pcap(is_dl, 4, pdu->msg, pdu_len);
if (is_dl) {
pcap->write_dl_am_ccch(pdu->msg, pdu_len);
} else {
@ -212,11 +252,35 @@ private:
}
} else {
log.warning_hex(pdu->msg, pdu->N_bytes, "Dropping RLC PDU (%d B)\n", pdu->N_bytes);
skip_action = true; // Avoid drop duplicating this PDU
}
// Duplicate
if (real_dist(mt19937) > args.pdu_duplicate_rate || skip_action) {
it++;
skip_action = false; // Allow action on the next PDU
} else {
log.warning_hex(pdu->msg, pdu->N_bytes, "Duplicating RLC PDU (%d B)\n", pdu->N_bytes);
skip_action = true; // Avoid drop of this PDU
}
}
}
void run_thread()
void run_tti(rlc_interface_mac* tx_rlc, rlc_interface_mac* rx_rlc, bool is_dl)
{
std::vector<unique_byte_buffer_t> pdu_list;
// Run Tx
run_tx_tti(tx_rlc, rx_rlc, pdu_list);
// Reverse PDUs
std::reverse(pdu_list.begin(), pdu_list.end());
// Run Rx
run_rx_tti(tx_rlc, rx_rlc, is_dl, pdu_list);
}
void run_thread() override
{
while (run_enable) {
// Downlink direction first (RLC1->RLC2)