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srsRAN_4G/srsenb/test/mac/sched_benchmark.cc

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/**
*
* \section COPYRIGHT
*
* Copyright 2013-2020 Software Radio Systems Limited
*
* By using this file, you agree to the terms and conditions set
* forth in the LICENSE file which can be found at the top level of
* the distribution.
*
*/
#include "sched_test_common.h"
#include "srsenb/hdr/stack/mac/sched.h"
#include "srslte/adt/accumulators.h"
#include <chrono>
namespace srsenb {
struct run_params {
uint32_t nof_prbs;
uint32_t nof_ues;
uint32_t nof_ttis;
uint32_t cqi;
const char* sched_policy;
};
struct run_params_range {
std::vector<uint32_t> nof_prbs = {6, 15, 25, 50, 75, 100};
std::vector<uint32_t> nof_ues = {1, 2, 5};
uint32_t nof_ttis = 10000;
std::vector<uint32_t> cqi = {5, 10, 15};
std::vector<const char*> sched_policy = {"time_rr", "time_pf"};
size_t nof_runs() const { return nof_prbs.size() * nof_ues.size() * cqi.size() * sched_policy.size(); }
run_params get_params(size_t idx) const
{
run_params r = {};
r.nof_ttis = nof_ttis;
r.nof_prbs = nof_prbs[idx % nof_prbs.size()];
idx /= nof_prbs.size();
r.nof_ues = nof_ues[idx % nof_ues.size()];
idx /= nof_ues.size();
r.cqi = cqi[idx % cqi.size()];
idx /= cqi.size();
r.sched_policy = sched_policy.at(idx);
return r;
}
};
class sched_tester : public sched_sim_base
{
static std::vector<sched_interface::cell_cfg_t> get_cell_cfg(srslte::span<const sched_cell_params_t> cell_params)
{
std::vector<sched_interface::cell_cfg_t> cell_cfg_list;
for (const auto& c : cell_params) {
cell_cfg_list.push_back(c.cfg);
}
return cell_cfg_list;
}
public:
explicit sched_tester(sched* sched_obj_,
const sched_interface::sched_args_t& sched_args,
const std::vector<sched_interface::cell_cfg_t>& cell_cfg_list) :
sched_sim_base(sched_obj_, sched_args, cell_cfg_list),
sched_ptr(sched_obj_),
dl_result(cell_cfg_list.size()),
ul_result(cell_cfg_list.size())
{}
srslog::basic_logger& mac_logger = srslog::fetch_basic_logger("MAC");
sched* sched_ptr;
uint32_t dl_bytes_per_tti = 100000;
uint32_t ul_bytes_per_tti = 100000;
run_params current_run_params = {};
std::vector<sched_interface::dl_sched_res_t> dl_result;
std::vector<sched_interface::ul_sched_res_t> ul_result;
struct throughput_stats {
srslte::rolling_average<float> mean_dl_tbs, mean_ul_tbs, avg_dl_mcs, avg_ul_mcs;
srslte::rolling_average<float> avg_latency;
};
throughput_stats total_stats;
int advance_tti()
{
tti_point tti_rx = get_tti_rx().is_valid() ? get_tti_rx() + 1 : tti_point(0);
mac_logger.set_context(tti_rx.to_uint());
new_tti(tti_rx);
for (uint32_t cc = 0; cc < get_cell_params().size(); ++cc) {
std::chrono::time_point<std::chrono::steady_clock> tp = std::chrono::steady_clock::now();
TESTASSERT(sched_ptr->dl_sched(to_tx_dl(tti_rx).to_uint(), cc, dl_result[cc]) == SRSLTE_SUCCESS);
TESTASSERT(sched_ptr->ul_sched(to_tx_ul(tti_rx).to_uint(), cc, ul_result[cc]) == SRSLTE_SUCCESS);
std::chrono::time_point<std::chrono::steady_clock> tp2 = std::chrono::steady_clock::now();
std::chrono::nanoseconds tdur = std::chrono::duration_cast<std::chrono::nanoseconds>(tp2 - tp);
total_stats.avg_latency.push(tdur.count());
}
sf_output_res_t sf_out{get_cell_params(), tti_rx, ul_result, dl_result};
update(sf_out);
process_stats(sf_out);
return SRSLTE_SUCCESS;
}
void set_external_tti_events(const sim_ue_ctxt_t& ue_ctxt, ue_tti_events& pending_events) override
{
// do nothing
if (ue_ctxt.conres_rx) {
sched_ptr->ul_bsr(ue_ctxt.rnti, 1, dl_bytes_per_tti);
sched_ptr->dl_rlc_buffer_state(ue_ctxt.rnti, 3, ul_bytes_per_tti, 0);
if (get_tti_rx().to_uint() % 5 == 0) {
for (auto& cc : pending_events.cc_list) {
cc.dl_cqi = current_run_params.cqi;
cc.ul_snr = 40;
}
}
}
}
void process_stats(sf_output_res_t& sf_out)
{
for (uint32_t cc = 0; cc < get_cell_params().size(); ++cc) {
uint32_t dl_tbs = 0, ul_tbs = 0, dl_mcs = 0, ul_mcs = 0;
for (const auto& data : sf_out.dl_cc_result[cc].data) {
dl_tbs += data.tbs[0];
dl_tbs += data.tbs[1];
dl_mcs = std::max(dl_mcs, data.dci.tb[0].mcs_idx);
}
total_stats.mean_dl_tbs.push(dl_tbs);
if (not sf_out.dl_cc_result[cc].data.empty()) {
total_stats.avg_dl_mcs.push(dl_mcs);
}
for (const auto& pusch : sf_out.ul_cc_result[cc].pusch) {
ul_tbs += pusch.tbs;
ul_mcs = std::max(ul_mcs, pusch.dci.tb.mcs_idx);
}
total_stats.mean_ul_tbs.push(ul_tbs);
if (not sf_out.ul_cc_result[cc].pusch.empty()) {
total_stats.avg_ul_mcs.push(ul_mcs);
}
}
}
};
struct run_data {
run_params params;
float avg_dl_throughput;
float avg_ul_throughput;
float avg_dl_mcs;
float avg_ul_mcs;
std::chrono::microseconds avg_latency;
};
int run_benchmark_scenario(run_params params, std::vector<run_data>& run_results)
{
std::vector<sched_interface::cell_cfg_t> cell_list(1, generate_default_cell_cfg(params.nof_prbs));
sched_interface::ue_cfg_t ue_cfg_default = generate_default_ue_cfg();
sched_interface::sched_args_t sched_args = {};
sched_args.sched_policy = params.sched_policy;
sched sched_obj;
rrc_dummy rrc{};
sched_obj.init(&rrc, sched_args);
sched_tester tester(&sched_obj, sched_args, cell_list);
tester.total_stats = {};
tester.current_run_params = params;
for (uint32_t ue_idx = 0; ue_idx < params.nof_ues; ++ue_idx) {
uint16_t rnti = 0x46 + ue_idx;
// Add user (first need to advance to a PRACH TTI)
while (not srslte_prach_tti_opportunity_config_fdd(
tester.get_cell_params()[ue_cfg_default.supported_cc_list[0].enb_cc_idx].cfg.prach_config,
tester.get_tti_rx().to_uint(),
-1)) {
TESTASSERT(tester.advance_tti() == SRSLTE_SUCCESS);
}
TESTASSERT(tester.add_user(rnti, ue_cfg_default, 16) == SRSLTE_SUCCESS);
TESTASSERT(tester.advance_tti() == SRSLTE_SUCCESS);
}
// Ignore stats of the first TTIs until all UEs DRB1 are created
auto ue_db_ctxt = tester.get_enb_ctxt().ue_db;
while (not std::all_of(ue_db_ctxt.begin(), ue_db_ctxt.end(), [](std::pair<uint16_t, const sim_ue_ctxt_t*> p) {
return p.second->conres_rx;
})) {
tester.advance_tti();
ue_db_ctxt = tester.get_enb_ctxt().ue_db;
}
tester.total_stats = {};
// Run benchmark
for (uint32_t count = 0; count < params.nof_ttis; ++count) {
tester.advance_tti();
}
run_data run_result = {};
run_result.params = params;
run_result.avg_dl_throughput = tester.total_stats.mean_dl_tbs.value() * 8.0F / 1e-3F;
run_result.avg_ul_throughput = tester.total_stats.mean_ul_tbs.value() * 8.0F / 1e-3F;
run_result.avg_dl_mcs = tester.total_stats.avg_dl_mcs.value();
run_result.avg_ul_mcs = tester.total_stats.avg_ul_mcs.value();
run_result.avg_latency = std::chrono::microseconds(static_cast<int>(tester.total_stats.avg_latency.value() / 1000));
run_results.push_back(run_result);
return SRSLTE_SUCCESS;
}
run_data expected_run_result(run_params params)
{
assert(params.cqi == 15 && "only cqi=15 supported for now");
run_data ret{};
int tbs_idx = srslte_ra_tbs_idx_from_mcs(28, false, false);
int tbs = srslte_ra_tbs_from_idx(tbs_idx, params.nof_prbs);
ret.avg_dl_throughput = static_cast<float>(tbs) * 1e3F; // bps
tbs_idx = srslte_ra_tbs_idx_from_mcs(24, false, true);
uint32_t nof_pusch_prbs = params.nof_prbs - (params.nof_prbs == 6 ? 2 : 4);
tbs = srslte_ra_tbs_from_idx(tbs_idx, nof_pusch_prbs);
ret.avg_ul_throughput = static_cast<float>(tbs) * 1e3F; // bps
ret.avg_dl_mcs = 27;
ret.avg_ul_mcs = 22;
switch (params.nof_prbs) {
case 6:
ret.avg_dl_mcs = 25;
ret.avg_dl_throughput *= 0.68;
ret.avg_ul_throughput *= 0.75;
break;
case 15:
ret.avg_dl_throughput *= 0.95;
ret.avg_ul_throughput *= 0.7;
break;
default:
ret.avg_dl_throughput *= 0.97;
ret.avg_ul_throughput *= 0.85;
break;
}
return ret;
}
void print_benchmark_results(const std::vector<run_data>& run_results)
{
srslog::flush();
fmt::print("run | Nprb | cqi | sched pol | Nue | DL/UL [Mbps] | DL/UL mcs | DL/UL OH [%] | latency "
"[usec]\n");
fmt::print("---------------------------------------------------------------------------------------"
"------\n");
for (uint32_t i = 0; i < run_results.size(); ++i) {
const run_data& r = run_results[i];
int tbs_idx = srslte_ra_tbs_idx_from_mcs(28, false, false);
int tbs = srslte_ra_tbs_from_idx(tbs_idx, r.params.nof_prbs);
float dl_rate_overhead = 1.0F - r.avg_dl_throughput / (static_cast<float>(tbs) * 1e3F);
tbs_idx = srslte_ra_tbs_idx_from_mcs(24, false, true);
uint32_t nof_pusch_prbs = r.params.nof_prbs - (r.params.nof_prbs == 6 ? 2 : 4);
tbs = srslte_ra_tbs_from_idx(tbs_idx, nof_pusch_prbs);
float ul_rate_overhead = 1.0F - r.avg_ul_throughput / (static_cast<float>(tbs) * 1e3F);
fmt::print("{:>3d}{:>6d}{:>6d}{:>12}{:>6d}{:>9.2}/{:>4.2}{:>9.1f}/{:>4.1f}{:9.1f}/{:>4.1f}{:12d}\n",
i,
r.params.nof_prbs,
r.params.cqi,
r.params.sched_policy,
r.params.nof_ues,
r.avg_dl_throughput / 1e6,
r.avg_ul_throughput / 1e6,
r.avg_dl_mcs,
r.avg_ul_mcs,
dl_rate_overhead * 100,
ul_rate_overhead * 100,
r.avg_latency.count());
}
}
int run_rate_test()
{
fmt::print("\n====== Scheduler Rate Test ======\n\n");
run_params_range run_param_list{};
srslog::basic_logger& mac_logger = srslog::fetch_basic_logger("MAC");
run_param_list.nof_ues = {1};
run_param_list.cqi = {15};
std::vector<run_data> run_results;
size_t nof_runs = run_param_list.nof_runs();
for (size_t r = 0; r < nof_runs; ++r) {
run_params runparams = run_param_list.get_params(r);
mac_logger.info("\n=== New run {} ===\n", r);
TESTASSERT(run_benchmark_scenario(runparams, run_results) == SRSLTE_SUCCESS);
}
print_benchmark_results(run_results);
bool success = true;
for (auto& run : run_results) {
run_data expected = expected_run_result(run.params);
if (run.avg_dl_mcs < expected.avg_dl_mcs) {
fmt::print(
"Nprb={:>2d}: DL mcs below expected ({} < {})\n", run.params.nof_prbs, run.avg_dl_mcs, expected.avg_dl_mcs);
success = false;
}
if (run.avg_dl_throughput < expected.avg_dl_throughput) {
fmt::print("Nprb={:>2d}: DL rate below expected ({:.2} < {:.2}) Mbps\n",
run.params.nof_prbs,
run.avg_dl_throughput / 1e6,
expected.avg_dl_throughput / 1e6);
success = false;
}
if (run.avg_ul_mcs < expected.avg_ul_mcs) {
fmt::print(
"Nprb={:>2d}: UL mcs below expected ({} < {})\n", run.params.nof_prbs, run.avg_ul_mcs, expected.avg_ul_mcs);
success = false;
}
if (run.avg_ul_throughput < expected.avg_ul_throughput) {
fmt::print("Nprb={:>2d}: UL rate below expected ({:.2} < {:.2}) Mbps\n",
run.params.nof_prbs,
run.avg_ul_throughput / 1e6,
expected.avg_ul_throughput / 1e6);
success = false;
}
}
return success ? SRSLTE_SUCCESS : SRSLTE_ERROR;
}
int run_all()
{
run_params_range run_param_list{};
srslog::basic_logger& mac_logger = srslog::fetch_basic_logger("MAC");
fmt::print("Running all param combinations\n");
std::vector<run_data> run_results;
size_t nof_runs = run_param_list.nof_runs();
for (size_t r = 0; r < nof_runs; ++r) {
run_params runparams = run_param_list.get_params(r);
mac_logger.info("\n### New run {} ###\n", r);
TESTASSERT(run_benchmark_scenario(runparams, run_results) == SRSLTE_SUCCESS);
}
print_benchmark_results(run_results);
return SRSLTE_SUCCESS;
}
int run_benchmark()
{
run_params_range run_param_list{};
srslog::basic_logger& mac_logger = srslog::fetch_basic_logger("MAC");
run_param_list.nof_ttis = 1000000;
run_param_list.nof_prbs = {100};
run_param_list.cqi = {15};
run_param_list.nof_ues = {5};
run_param_list.sched_policy = {"time_pf"};
std::vector<run_data> run_results;
size_t nof_runs = run_param_list.nof_runs();
fmt::print("Running Benchmark\n");
for (size_t r = 0; r < nof_runs; ++r) {
run_params runparams = run_param_list.get_params(r);
mac_logger.info("\n### New run {} ###\n", r);
TESTASSERT(run_benchmark_scenario(runparams, run_results) == SRSLTE_SUCCESS);
}
print_benchmark_results(run_results);
return SRSLTE_SUCCESS;
}
} // namespace srsenb
int main(int argc, char* argv[])
{
// Setup the log spy to intercept error and warning log entries.
if (!srslog::install_custom_sink(
srslte::log_sink_spy::name(),
std::unique_ptr<srslte::log_sink_spy>(new srslte::log_sink_spy(srslog::get_default_log_formatter())))) {
return SRSLTE_ERROR;
}
auto* spy = static_cast<srslte::log_sink_spy*>(srslog::find_sink(srslte::log_sink_spy::name()));
if (spy == nullptr) {
return SRSLTE_ERROR;
}
auto& mac_log = srslog::fetch_basic_logger("MAC");
mac_log.set_level(srslog::basic_levels::warning);
auto& test_log = srslog::fetch_basic_logger("TEST", *spy, false);
test_log.set_level(srslog::basic_levels::warning);
// Start the log backend.
srslog::init();
bool run_benchmark = false;
if (argc == 1 or strcmp(argv[1], "test") == 0) {
TESTASSERT(srsenb::run_rate_test() == SRSLTE_SUCCESS);
} else if (strcmp(argv[1], "benchmark") == 0) {
TESTASSERT(srsenb::run_benchmark() == SRSLTE_SUCCESS);
} else {
TESTASSERT(srsenb::run_all() == SRSLTE_SUCCESS);
}
return 0;
}
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