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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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openair2/GNB_APP/L1_nr_paramdef.h
+6
View File
@@ -28,6 +28,10 @@
#define L1_MAX_LDPC_ITERATIONS "max_ldpc_iterations"
#define L1_RX_THREAD_CORE "L1_rx_thread_core"
#define L1_TX_THREAD_CORE "L1_tx_thread_core"
#define L1_NUM_RX_SYM_PER_THREAD "L1_num_rx_sym_per_thread"
#define HLP_L1_NUM_RX_SYM_PER_THREAD "number of symbols processed per PUSCH generation thread"
#define L1_NUM_TX_SYM_PER_THREAD "L1_num_tx_sym_per_thread"
#define HLP_L1_NUM_TX_SYM_PER_THREAD "number of symbols processed per PDSCH generation thread"
#define HLP_TP_SIZ "thread_pool_size paramter removed, please use --thread-pool"
#define L1_TX_AMP_BACKOFF_dB "tx_amp_backoff_dB"
#define HLP_L1TX_BO "Backoff from full-scale output at the L1 entity(frequency domain), ex. 12 would corresponding to 14-bit input level (6 dB/bit). Default 36 dBFS for OAI RU entity"
@@ -58,6 +62,8 @@
{L1_MAX_LDPC_ITERATIONS, NULL, 0, .uptr=NULL, .defintval=8, TYPE_UINT, 0}, \
{L1_RX_THREAD_CORE, NULL, 0, .iptr=NULL, .defintval=-1, TYPE_INT, 0}, \
{L1_TX_THREAD_CORE, NULL, 0, .iptr=NULL, .defintval=-1, TYPE_INT, 0}, \
{L1_NUM_RX_SYM_PER_THREAD, HLP_L1_NUM_RX_SYM_PER_THREAD, 0, .iptr=NULL, .defintval=1, TYPE_INT, 0}, \
{L1_NUM_TX_SYM_PER_THREAD, HLP_L1_NUM_TX_SYM_PER_THREAD, 0, .iptr=NULL, .defintval=0, TYPE_INT, 0}, \
{L1_TX_AMP_BACKOFF_dB, HLP_L1TX_BO,0, .uptr=NULL, .defintval=36, TYPE_UINT, 0}, \
{L1_PHASE_COMP, HLP_L1_PHASE_COMP,PARAMFLAG_BOOL, .uptr=NULL,.defintval=1, TYPE_UINT, 0}, \
{L1_NUM_ANTENNAS_PER_THREAD, HLP_NUM_ARX,0, .uptr=NULL, .defintval=1, TYPE_UINT, 0}, \
openair2/GNB_APP/gnb_config.c
+3
View File
@@ -841,6 +841,9 @@ void RCconfig_NR_L1(void)
gNB->L1_rx_thread_core = *gpd(params, np, L1_RX_THREAD_CORE)->iptr;
gNB->L1_tx_thread_core = *gpd(params, np, L1_TX_THREAD_CORE)->iptr;
LOG_I(NR_PHY, "thread cores for L1_RX %d L1_TX %d\n", gNB->L1_rx_thread_core, gNB->L1_tx_thread_core);
// PUSCH symbols per thread need to be calculated by how many threads we have
gNB->num_pusch_symbols_per_thread = *gpd(params, np, L1_NUM_RX_SYM_PER_THREAD)->iptr;
gNB->num_pdsch_symbols_per_thread = *gpd(params, np, L1_NUM_TX_SYM_PER_THREAD)->iptr;
gNB->TX_AMP = min(32767.0 / pow(10.0, .05 * (double)(*gpd(params, np, L1_TX_AMP_BACKOFF_dB)->uptr)), INT16_MAX);
LOG_I(NR_PHY, "TX_AMP = %d (-%d dBFS)\n", gNB->TX_AMP, *gpd(params, np, L1_TX_AMP_BACKOFF_dB)->uptr);
AssertFatal(gNB->TX_AMP > 300, "TX_AMP is too small, must be larger than 300 (is %d)\n", gNB->TX_AMP);