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Merge remote-tracking branch 'origin/tx_symbol_processing' into integration_2026_w15 (!3489)

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Thread-pool support for TX symbol processing.

This MR adds thread-pool support for TX symbol processing. It allows modulation
/mapping/layer-precoding to run in parallel and offers a speedup of around 3
compared to single-thread execution. This is particularly important for large
bandwidths and 4 or more TX antenna ports where the precoding operation is quite
computationally-intensive.

Please see the description of !3489 for the performance comparison results and
the nr_dlsim timing measurements.
This commit is contained in:
Jaroslava Fiedlerova
2026-04-09 18:11:03 +02:00
parent 83ffa53ccc 03350ab21b
commit 8583689349
8 changed files with 300 additions and 137 deletions
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openair1/SIMULATION/NR_PHY/dlsim.c
+8
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@@ -382,6 +382,8 @@ int main(int argc, char **argv)
uint8_t dlsch_threads = 0;
int chest_type[2] = {0};
uint8_t max_ldpc_iterations = 5;
// number of PDSCH symbols per thread = 0 means do not use thread pool
int num_pdsch_symbols_per_thread = 0;
if ((uniqCfg = load_configmodule(argc, argv, CONFIG_ENABLECMDLINEONLY)) == 0) {
exit_fun("[NR_DLSIM] Error, configuration module init failed\n");
}
@@ -583,6 +585,10 @@ int main(int argc, char **argv)
gNBthreads[sizeof(gNBthreads)-1]=0;
break;
case 'Y':
num_pdsch_symbols_per_thread = atoi(optarg);
break;
case 'Z' :
filename_csv = strdup(optarg);
AssertFatal(filename_csv != NULL, "strdup() error: errno %d\n", errno);
@@ -657,6 +663,7 @@ int main(int argc, char **argv)
printf("-T Enable PTRS, arguments list L_PTRS{0,1,2} K_PTRS{2,4}, e.g. -T 2 0 2 \n");
printf("-U Change DMRS Config, arguments list DMRS TYPE{0=A,1=B} DMRS AddPos{0:2} DMRS ConfType{1:2}, e.g. -U 3 0 2 1 \n");
printf("-X gNB thread pool configuration, n => no threads\n");
printf("-Y Number of symbols processed per PDSCH generation thread\n");
printf("-Z Output filename (.csv format) for stats\n");
exit (-1);
break;
@@ -715,6 +722,7 @@ int main(int argc, char **argv)
AssertFatal((gNB->if_inst = NR_IF_Module_init(0)) != NULL, "Cannot register interface");
gNB->if_inst->NR_PHY_config_req = nr_phy_config_request;
gNB->num_pdsch_symbols_per_thread = num_pdsch_symbols_per_thread;
NR_ServingCellConfigCommon_t *scc = calloc(1,sizeof(*scc));;
prepare_scc(scc);