maki/openairinterface5g
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge remote-tracking branch 'origin/precoder_optimization' into integration_2025_w42 (!3623)

Browse Source 
Optimization of PDSCH precoding operation

x86/aarch64 optimizations for precoding, more complete timing reporting in
nr_dlsim. Timing report in nr_dlsim now shows the total PDSCH generation time
and is broken down into Layer mapping, resource mapping and precoding.
The optimizations for x86 are basically reorganizing loops (for AVX512,AVX2,
NEON but not SSE2) to minimize repetitive instructions when formatting of the
precoder weights, and creation of inline functions for complex multiply-add.
AVX512 optimization was added. requiring AVX512BW. Detection of up to 4 PRBs
with common PMI for efficiency with AVX512 (was 2 in develop for AVX2).
For aarch64, native coding of the precoder to avoid inefficient SIMDe
translations for this operation.
nr_dlsim now uses default precoding indices depending on the scenario instead
of 0 which doesn't do precoding at all.

See merge request description for nr_dlsim test results.
This commit is contained in:
Jaroslava Fiedlerova
2025-10-13 11:39:57 +02:00
parent 92bc0aee0e 0dcea09e87
commit 769885c05a
14 changed files with 422 additions and 227 deletions
Download Patch File Download Diff File Expand all files Collapse all files
openair2/LAYER2/NR_MAC_gNB/config.c
+6 -8
View File
@@ -136,8 +136,7 @@ int precoding_weigths_generation(nfapi_nr_pm_list_t *mat,
nfapi_nr_pm_weights_t *weights = &mat->pmi_pdu[pmiq].weights[j_col][i_rows];
res_code = sqrt(1 / (double)L) * v_lm[llc][mmc][i_rows];
c16_t precoder_weight = convert_precoder_weight(res_code);
weights->precoder_weight_Re = precoder_weight.r;
weights->precoder_weight_Im = precoder_weight.i;
*weights = precoder_weight;
LOG_D(PHY,
"%d Layer Precoding Matrix[pmi %d][antPort %d][layerIdx %d]= %f+j %f -> Fixed Point %d+j %d \n",
L,
@@ -146,15 +145,14 @@ int precoding_weigths_generation(nfapi_nr_pm_list_t *mat,
j_col,
creal(res_code),
cimag(res_code),
weights->precoder_weight_Re,
weights->precoder_weight_Im);
weights->r,
weights->i);
}
for (int i_rows = N1 * N2; i_rows < 2 * N1 * N2; i_rows++) {
nfapi_nr_pm_weights_t *weights = &mat->pmi_pdu[pmiq].weights[j_col][i_rows];
res_code = sqrt(1 / (double)L) * (phase_sign)*theta_n[nn] * v_lm[llc][mmc][i_rows - N1 * N2];
c16_t precoder_weight = convert_precoder_weight(res_code);
weights->precoder_weight_Re = precoder_weight.r;
weights->precoder_weight_Im = precoder_weight.i;
*weights = precoder_weight;
LOG_D(PHY,
"%d Layer Precoding Matrix[pmi %d][antPort %d][layerIdx %d]= %f+j %f -> Fixed Point %d+j %d \n",
L,
@@ -163,8 +161,8 @@ int precoding_weigths_generation(nfapi_nr_pm_list_t *mat,
j_col,
creal(res_code),
cimag(res_code),
weights->precoder_weight_Re,
weights->precoder_weight_Im);
weights->r,
weights->i);
}
}
pmiq++;
openair2/LAYER2/PDCP_v10.1.0/pdcp.c
+1 -2
View File
@@ -231,8 +231,7 @@ bool pdcp_data_req(protocol_ctxt_t *ctxt_pP,
hashtable_rc_t h_rc;
uint8_t rb_offset= (srb_flagP == 0) ? DTCH -1 : 0;
uint16_t pdcp_uid=0;
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PDCP_DATA_REQ,VCD_FUNCTION_IN);
CHECK_CTXT_ARGS(ctxt_pP);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PDCP_DATA_REQ, VCD_FUNCTION_IN);
#if T_TRACER
if (ctxt_pP->enb_flag != ENB_FLAG_NO)
openair2/LAYER2/RLC/rlc.h
-16
View File
@@ -262,22 +262,6 @@ void rlc_data_ind(const protocol_ctxt_t *const,
const sdu_size_t,
uint8_t *const);
/*! \fn void rlc_data_conf (const protocol_ctxt_t* const ctxtP, const srb_flag_t srb_flagP, const rb_id_t rb_idP, const mui_t muiP, const rlc_tx_status_t statusP)
* \brief Interface with higher layers, confirm to upper layer the transmission status for a SDU stamped with a MUI, scheduled for transmission.
* \param[in] ctxtP Running context.
* \param[in] srb_flagP Flag to indicate SRB (1) or DRB (0)
* \param[in] rb_idP Radio bearer identifier.
* \param[in] muiP Message Unit identifier.
* \param[in] statusP Status of the transmission (RLC_SDU_CONFIRM_YES, RLC_SDU_CONFIRM_NO).
*/
void rlc_data_conf(
const protocol_ctxt_t *const,
const srb_flag_t,
const rb_id_t,
const mui_t,
const rlc_tx_status_t );
/*! \fn rlc_op_status_t rlc_stat_req (
const protocol_ctxt_t* const ctxtP,
const srb_flag_t srb_flagP,